BenQ MX764 manuale d’uso

We l c o m e MX763/MX764 Digital P roj ecto r Us e r M a n u a l[...]

Table of contents 2 Ta b l e o f c o n t e n t s Important safety instructions .. ....................... 3 Introduction . ....................... 7 Projector features .................................. 7 Shipping contents .................................. 8 Projector exterior view .......................... 9 Controls and functions ..............[...]

Important safety inst ructions 3 Important safet y instructions Y our pr ojector is des igned and test ed to meet the latest standar ds for sa fety of information technology equipment. H owev er , t o ensure safe use of this product, it is important that yo u follow the instructions mentioned in this manual and marked on the product. Safety Instru [...]

Important safety inst ructions 4 Safety Instruction s (Continued) 7. The lamp becomes extremely hot during operati on. Allow the projector to cool fo r appro ximately 45 minut es prior to removi ng the lamp asse mbly for replac ement. 8. Do not operate lamps beyond the rated lamp life. Excessive operation of lamps beyond the rated life could cause [...]

Important safety inst ructions 5 Safety Instructions (Continued) 13. Do not place this project or in any of the followin g environments. - Space that is poorly ventilated or confined. Allo w at least 50 cm clearance from walls and free flow of air around the projector . - Locations wher e temperatures ma y become ex cessively high, such as the insi[...]

Important safety inst ructions 6 Safety Instructions (Continued) 17. Do not step on the projector or place any objects upon it. Besides probable physical damage to th e projector , doing so may result in ac cidents and possible injur y . 18. Do not place liquids near o r on the projector . Liquids spilled in to the projector may cause it to fail. I[...]

Introduc tion 7 In trod uction Pr ojector features The projector integ rates hig h-perfor mance optical eng ine projection and a user-fri endly design to deliv er high reliability and ease of use. The projector off ers the following features. • Netw ork Se ttings allowing management of pr ojector status from a c omputer using a web browser • Mi[...]

Introduction 8 Shipping contents Carefully unpack and verify that you hav e all of the items shown b elow . If any of these items are missing, please contact your place of purchase. St an da rd acce ss or i es The supplied accessories will be suit able for your region, and may differ from those illustrate d. *The warranty card is only supplie d in [...]

Introduc tion 9 Proj e cto r ex te r io r v ie w 1. Ext ernal contr o l panel (See "Controls and functions" on page 10 for details.) 2. Lamp co ver 3. V ent (heated air e xhaust) 4. Lens co ver 5. F ocus rin g and Z oom ring 6. V ent (cool air intak e) 7. Front IR remote sensor 8. Pr ojection lens 9. A C powe r jack 10. K ensington anti-t[...]

Introduction 10 Contro ls and func ti ons Pro j e c to r 9. TEMP erature warning light Lights up red if the projector's temperat ure becomes too high. 10. LAMP indicator light Indicates the status of the lamp . Lig hts up or flashes when the lamp has devel oped a problem. 11. AUTO A utomatically det ermines the best picture timings for the dis[...]

Introduc tion 11 R emote contr ol 1. ON/OFF T oggles the pr ojector betw een standby mode and on. 2. Source selection buttons (COMPUTE R -1, COMPUTER -2, VIDEO , S-VIDEO) Selects an input source for display . 3. MENU/EXIT T ur ns on the On-Screen D isplay (OSD) menu. Goes back to previous OSD menu, exits and sav e s menu settings. 4. BLANK U sed to[...]

Introduction 12 17. ZOOM+/ZOOM- Magnifi es or reduces the projecte d image size. 18. VOLUME+/VOL UME- Adjusts the sound level. 19. MUTE T oggles projecto r audio between on and off. 20. ASPECT Selects t he displa y aspect ratio . 21. MIC/VOL +/ - Adjusts the micro phone sound level. 22. CAPT URE Captures the projected picture and sa ve it as your s[...]

Introduc tion 13 Re mote cont rol effective ran ge Infra-R ed (IR) r emote c ontrol sen sors are loca ted on the fr ont and the top of t he project or . The remot e control must be held at an angle within 30 degrees perpendicular t o the projector's IR r emote control sensors to function correctly . The distance between the remote control and [...]

Positioning your project or 14 P ositioning your pr ojec tor Choosing a location Y our projector is desi gned to be in stalled i n one of four possible installation locations: Y our room lay out or personal prefer ence will dictate which installation location you select. T ake into consider ation the size and p osition of your screen, the location [...]

Positioning your project or 15 O btaining a preferr ed projected image siz e The distanc e from the pr ojector lens t o the screen, the z oom setting, and the video format each factor s in the project ed image size. Pr oje ction dimensions Ref er to "Dim ensions" on page 75 for the center of lens dimensions of this projector before calcul[...]

Positioning your project or 16 Shifting the pr ojection lens The lens shift contr ol pro vides flexibility for inst alling y our projecto r . It allows th e projector to be positioned off the center of the screen. The lens shift is expressed as a percentag e of the projected imag e height or width. It is measured as an o ffset from the p rojected i[...]

Connection 17 Connection When connecting a signa l source to the projector , be sure to: 1. T urn all equipmen t off befor e making an y con nections. 2. U se the correct signal cables for eac h sourc e. 3. Ensur e the cables ar e firmly inserted. • In the connections shown below , some cables may not be included with the project or (see "Sh[...]

Connection 18 • Many notebooks do not turn on their external video ports when connected to a projector. Usually a key combo li ke FN + F3 or CRT/LCD key turns the exter nal display on/off. Locate a function key labeled CRT/LCD or a function key wi th a monitor symbol on the notebook. Press FN and the labeled function key simu ltaneously . Refer t[...]

Connection 19 Pla y ing sound through the pr ojector Y ou can mak e use of the pr ojector (mix ed mono) speak er in your presentation s, and also connect se parate amp lified sp eakers to the AUDIO OUT sock et of the project or . If you ha ve a separate sound system, y ou wi ll most likely want to c onnect the audio output of your V ideo sou rce de[...]

Connection 20 • Y ou mi ght get fe edback noise from the microphone w hen you are too close to the speaker of the projector. M ove the m icrophone awa y from the speak er of the pr ojector . The g reater volume you require, the g reater distance you need to b e away from the speaker to prevent the noise.[...]

Operation 21 Operation Star ting up the projecto r 1. Plug the po wer cor d into the pr ojector and int o a power outlet. T urn on th e power outlet s witch (where fitted) . Check that the PO WER indicat or light on the projector lights orange after pow er has been applied. Please use the original accessori es (e.g. power cord) only with the device[...]

Operat ion 22 A d justing the project ed image A djusting the pr ojection angle The projector is equi pped 4 adjuster feet. T hese adjusters change the image heig ht and projection angle. T o adjust the pr ojector: Screw the r ear adjuster f eet to fine-tune the horizont al angle. T o retract the fe et, screw the adjuster feet in a reverse direc ti[...]

Operation 23 Correcting k e yst one K e ystonin g refers to the situation where the pr ojected image is notic eably wider at either the top or bottom. It occurs when the projector is not p erpend icular to the screen. T o corr ect this, beside s adjusting the height of the pr ojector , if yo u want the pr ojector to automatically c orrect image k e[...]

Operat ion 24 Us i n g t h e m e n u s The pr ojector is eq uipped with On-Scree n Display (O SD) menus fo r making various adjustments and settings. Below is the overview of the OSD menu. The following example descr ibes how to set the OSD language. 1. Pr ess MENU/EXIT on the projector or remo te cont rol to t ur n t he OS D m enu on . 3. P ress t[...]

Operation 25 Securing the projecto r U sing a securit y cable loc k The pr ojector has to be installed in a safe place to prev ent theft. Otherwise, purc hase a lock, such as the K ensington l ock, to secure the projector. Y ou can locate a K ensington loc k slot on the projector . A Ken si n g to n se c u r i t y ca b l e l o c k i s u su a l l y [...]

Operat ion 26 If y ou forget the passwor d If the password functio n is activated, you will be asked to ent er the six-digit passwor d every time you turn on the projector . If you enter the wrong password, the password error message as pictured to the r ight is displayed lasting for 3 seconds, and the INPUT P ASSW ORD message follows. Y ou can ret[...]

Operation 27 Disabling the passwor d function T o disable password pr otection, go back to the SYSTEM S ETUP: Advanced > Security Settings > Change Security Settings menu after opening the OSD menu system. Press MODE/ENTER. The mess age “INPUT P ASSW ORD” is displayed. Ent er the curr ent password. i. If the password is correct, the OSD m[...]

Operat ion 28 S w itching input signal The projector can be connected to multiple devices at the same time. However , it can only display one full screen at a time. When starting up, the pr ojector automatically searches for the avai lable signals. Be su re t he Quick Auto Search function in the SOURCE menu is On if you want the proj ec tor to a ut[...]

Operation 29 Magnifyi ng and searching for details If y ou need to find the details on th e project ed picture, magnify the picture . U se the directio n arrow k eys for na vigating the pictur e. • U si ng the rem ote con tro l 1. Press ZOOM+/ZOOM- t o display the Zoom bar . Press ZOOM+ to magnif y the center of the pictur e. Press the key re pea[...]

Operat ion 30 About the aspect ratio • In the pictures below , the black portions are inactive areas and the white portions are active areas. • OSD menus can be displayed on those unused black areas. 1. Auto : Scales an image pr oportionally to fit the projector's native resolution in its horizontal or v ertical w idth. This is suitable fo[...]

Operation 31 Optimizing the i mage Us i n g W a l l C o l o r In the situation where you ar e projecting onto a color ed surface such as a painted wall which may not be whit e, the W all Color featur e can help corr ect the projecte d picture ’ s colors to prev ent possible co lor differe nce between the source and project ed pictures. T o use th[...]

Operat ion 32 8. The confirmation message “ Setting Sa ved ” is display ed. Fine-tuning the image quality in user modes Ac cording to the detected sig nal ty pe, there are some user-definable functi ons available when User 1 or User 2 is se lected. Based on your needs, you can make adj ustments to these functions by highligh ting them and press[...]

Operation 33 In most installatio n situations, color mana gement will not be necessary , such as in classroom, meeting room, or lounge room situations where ligh ts remain on, or where building exte rnal windows allow da ylight into the room. Only in permanent installations with controlled li ghting levels such as boardr ooms, lecture theaters, o r[...]

Operat ion 34 8. Make sure you hav e made al l of the des ired adjust ments. 9. Press MENU/EXIT to e xit and sav e the settings. Setting the presentation timer Presentation timer can indicate the presentat i on time on the scr een to help y ou achieve better tim e management when giv ing presentations. Follow these steps to utilize this function: 1[...]

Operation 35 R emote paging operations Connect the pr ojector to your PC o r notebook with a USB cable prior to using the paging function. See "Connection" on page 17 for details. Y ou can operate y our display softwar e program (on a co nnected PC) which responds t o page up/do wn commands (lik e Microsof t P owerP oint) by pressing PAGE[...]

Operat ion 36 Locking contr ol keys With the control keys on the projector locked, you can prevent your pr ojector settings from being cha nged accidentally (by chi ldren, for example). When the Panel Key Lo ck is on, no contr ol keys on the project or w ill operate e xc ept POWER . 1. Go to the SYSTEM S ETUP: Basic > Panel Key Lock menu, and se[...]

Operation 37 4. If the acti on is succ essful, y ou see the messag e ' Captured Su cceeded ' on the screen. The captured pict ure is sav ed as My S c r e e n . 5. T o view the captured pictur e displayed as the startup screen, set My S c re e n in the SYSTEM SETUP: Basic > Splash Scr een menu and restart the project or . • Using the [...]

Operat ion 38 Contr olling the proj ecto r through a LAN en v ironment Y ou can manage and control the projector from one or more r emote computers when the y are pr operly connected t o the same local area network. Cable connection If y ou are in a DHCP environment: 1. T ake a RJ45 cable and connect one end t o the RJ45 LAN input jack of the pr oj[...]

Operation 39 W ireless connection T o connect to th e projector w irelessly , you have to plug a BenQ wirele ss dongle (op tional) to the USB T ype A connector on the pr ojector , an d then only a f ew OSD configuration st eps are required. 1. Make sure the projector is tur ned on. 2. Do one of the following: •P r e s s NETWORK SETTING o n t he r[...]

Operat ion 40 4. Click Search in the SSID r ow to list all the availa ble wireless access points. Click the desired SSID in the Searc h result list and click A pply . 5. Disconnect the RJ45 cable from the computer . 6. Select the same SS ID from y our comput er . 7. Open QPresenter and search for the cor rect projector and click Connec t. • See &[...]

Operation 41 Contr olling the projector r emo tely thr oug h a web bro wser Once you hav e the correct IP ad dress for the pr ojector and the pr ojector is on or in standby mode, you can use any computer that is on the same local area network to control the project or . • If you are using Microsof t Internet Explorer , make sure it is version 7.0[...]

Operat ion 42 4. The V irtual K eypad page displays a virtual keypad with which you ca n contr ol the project or as if using the ph ysical keypad on the pr ojector . See "P rojector" on page 10 for how to operate it. 5. The Display Setting page provides some select ive OSD menu items necessary for contr olling the p rojector or ad justing[...]

Operation 43 6. The Picture Setting page pro vides all the OSD menu items in the PICTURE menu for adjusting th e projected pictures . See "2. PICTURE menu " on page 60 for how to use them. 7. The Information pag e displays the inform ation about the projector stat us, network status.[...]

Operat ion 44 8. The Conference Control page allows you to contr ol the display location in the same IP address when there are multiple users connecting to the projector . 9. The Crestron (eControl) page displays the Crestron eControl user interface. The eControl page provides a va riet y of vir tual keys to control the projector or adjust the proj[...]

Operation 45 The tools page allo ws you to manag e the pr ojector , configur e the LAN control settings and secure access of remote network operat ion on this projector . i. Y ou can name the projector , keep trac k of its location and th e person in charge of it. ii. Y ou can adjust the Network Settings . iii. Once set, access to the remote ne two[...]

Operat ion 46 10. T o hav e acces s to the A dmin page, y ou need to enter a passw ord. The page provides more netw ork settings. The default password is “0000” . If you want to c hange the password, enter th e Basic p age. The Basic page allo ws you to change the passw ord and set the maxim um number of connected computers. The number of conne[...]

Operation 47 The W ired LAN page allows y ou to adjust the Wir ed LAN settings. The W ireless LAN page allows you to adjust the Wireless LAN settings. The maximum length for SSID is 16 byt es. Please use different SSID when more than two projectors are connecting through w ireless LAN.[...]

Operat ion 48 The Mail p age allows y ou to send alert e-mail to y our ITS administrator . Y ou can first try the Mail T est functi on to check if the Alert Mail works. 11. These quick buttons are always provided on the we b page for you to operate the projector . U sing the web contr ol lock This func tion is desi gned to prevent un authorize d pe[...]

Operation 49 2. If the passwor d is correct, the OSD menu returns to the Security Settings page. Pr ess to h ighl ight Web Co ntrol Lock and press / to select On or Off . Displaying images through QPr esenter Downloading and installing QPr esenter QPresenter is an application running on th e ho s t PC . It h elp s co nn ect your com put er to an av[...]

Operat ion 50 2. The Sp ecial Feature page provides some advanced fun ctions to manage the projected images. • T o display a full screen, clic k Full Screen. • T o display a partial screen, click Selectable. A squar e appears on your scr een. Y ou can adju st its siz e and place it where you want t o project. • T o pause projec tion, click P [...]

Operation 51 • The QPr esenter only ac cepts up to 8 characters consi sting of English capitalized letters and digits 0-9 for t he name, full 6 digits consisting of 1 to 4 for the password. • T o change the Q Presenter interface language, click the down ar row to r eveal a drop- down list and select a desired lang uage. Click A pply . • T o a[...]

Operat ion 52 U sing the br oadcasting function When it comes t o 1:N LAN D isplay , there are two ways t o do this funct ion: 1. By T C P/IP (support up t o 8 projectors, original design) 2. By M ulticast (support up to 255 projectors, this new d esign) Y ou can select channel 1, 2, 3, 4, 5, 6... 25 with showing the correspondent IP (gr ay out). T[...]

Operation 53 Pr esenting from a USB Reader This feature displays a slide show of images stored on a USB flash drive connected to the project or . It can elimina te the need for a comput er sourc e. Supported image formats: • A square box will be displayed on the filename for unidentified characters. • Thai filename is not supported. • Files i[...]

Operat ion 54 U sing the USB Camer a 1. Plug the USB came ra to the pr ojector’ s USB T ype A port. For supported USB camera list, visit http://www .ideasonboar d.org/uvc/#footnote-1. 2. Open the Projector Network Display System and log in. 3. Go to the Basi c page and cli ck Conne ct in the USB Camera ro w. I mages captur ed by the USB camera wi[...]

Operation 55 T o shorten the cooling time, you can also activate the Quick cooling function. See "Quick Cooling" on page 62 fo r details. 3. Once the cooling process finishes, a " Po wer Off Ring To n e " will be heard. The PO WER indicator light is a steady orange and fans stop. Disconnect the power cord from the power outlet. [...]

Operat ion 56 Me n u o p e r a t i o n M enu system Please note th at the on-scree n display (OSD) menus vary acco rding to the signal type selected and t he project or model yo u are using. Main menu Sub-menu Options 1. DISPLAY Wall Color Off / Light Yellow / Pink / Light Green / Blue / Blackboard Aspect Ratio Auto / Real / 4:3 / 16:9 / 16:10 Auto[...]

Operation 57 Main menu Sub-menu Options 4. SYSTEM SETUP: Basic Language Projector Pos ition Front Ta ble / Rear Table / Rear Ceiling / Front Ceiling Menu Settings Menu Display Time 5 sec/10 sec/15 sec/20 sec/25 sec/30 sec Menu Position Center/T op-Left/T op-Right/ Bottom-Right/B ottom-Left Reminder Message On / Off Operati on Settings Direct Power [...]

Operat ion 58 Note that the menu items are available when the projector detec ts at least one valid sig nal. If there is no equipment conne cted to the projector or no signa l detected, limited menu items are acc essible. Main menu Sub-menu Options 5. SYSTEM SETUP: Advanced Baud Ra te 2400/4800/9600/14400/19200/ 38400/57600/1 15200 Test Pattern On [...]

Operation 59 Description of each menu Function Description Wall Color Co rrects the pr ojected pictur e’ s color when th e projectio n surface is n ot white. S ee "U sing W all Color" on page 31 for detai ls. Aspect Ratio Ther e are sev eral options t o set the image's aspect ratio dependin g on your input signal source. See "[...]

Operat ion 60 Function Description Teaching Template Pr ovides sev eral pr eset pattern s for various t eaching purpos es. Choose Blackboard or Whiteboard first by p ressing / and press / to choose the pattern you need. Press MODE/ENTER to display the select ed pattern. Picture Mode Pr e-defined picture modes ar e provided so y ou can optimize y ou[...]

Operation 61 Function Descriptio n Quick Auto Search See "S w itching input signal" on page 28 for d etails. Color Space Conversion See "Changing C olor Space" on page 28 for details. Presentation Timer Reminds the presenter to finish the presentation within a ce r tain time frame. See "Setting the pr esentation timer"[...]

Operat ion 62 Function Description Operation Settings Direct Power On Allows th e project or to turn on au t omatically once the po wer is fed thro ug h the pow er co rd. Signal Power On Sets whether t o turn the pr ojector dir ectly on w ithout pressing the POWER key on the projector or ON on the remote control wh en the pr ojector is in s tandby [...]

Operation 63 Function Description Remote Receiver Allows you to en able all the rem ote rec eivers or one specific r emote receiver on the pr oje ctor . Panel Key Lock Disables or enables all panel key functions except POWER on the projector and keys on the rem ote control. See "Locking control keys" on page 36 for details. Background Col[...]

Operat ion 64 Function Description Baud Rate Selects a baud rate that is identical with your c omputer’ s so that you can connect the pr ojector using a suit a ble RS-232 cable and update or download the project or’ s firmware. This function is int ended for qualifie d ser vice personne l. Test Pattern Selecting On enables the functi on and the[...]

Operation 65 Function Description Network Settings Wired LAN Wireless LAN Remote Desktop Projection Log In Code Broadcasting See "U sing the broadcasting f unction" on page 52 for details. AMX Device Discovery Whe n AMX Device Discovery is On , the projector ca n be dete cted by AMX contr oller . Mac Address Displays the mac address for t[...]

Maintenance 66 M aintenanc e Care of the pr ojector Y our pr ojector needs l ittle mainte nance. The only thing you need to do o n a regular bas is is to keep the lens and case clean. Nev er remov e any parts of the project or ex cept the lamp . Contact y our dealer if other parts need re placing. Cleaning the lens Clean the lens whene ver you noti[...]

Maintenance 67 Lamp information Getting to kno w the lamp hour Whe n the proj ector is in operation, the du ration (in hours) of lam p usage is aut omatically calculated by the built-in timer . See "Setting Lamp Mode as Economic" below for more information on Economic mode. T o obtain the lamp hour information: 1. Press MENU/EXIT and then[...]

Maintenance 68 T iming of r eplacing the lamp When the Lamp indicator lights up r ed or a message appears sugg esting it is time to r eplace the lamp , please install a new lamp o r consult y our dealer . An old l amp may cause a malfunction in th e project or and in some i nstances the lamp may e xplode. Go to http://lamp .b enq.com for a replacem[...]

Maintenance 69 R eplacing the lamp • T o reduce the risk of electrical shock, always turn the projector off and disconnect the power cord before changing the lamp. • T o reduce the risk of severe burns, allow the projector to cool for at least 45 minutes before replacing the lamp. • T o reduce the risk of injuries to fingers and damage to int[...]

Maintenance 70 7. Lift the handle so that it stands up. U se the handle to slo w ly pull the lamp out o f the projector . • Pulling it too quickly may cause the lamp to break and scatter broken glas s in the projector . • Do not place the lamp in locat ions where water might splash on it, children can reach it, or near flammable materials. • [...]

Maintenance 71 14. Connect the powe r and restart the project or . Do not turn the power on w i th the lamp cover removed. Resetting the lamp timer 15. After the startu p logo , open the On-Screen Display (OSD) menu. Go to the SYSTEM SETUP: Advanced > Lamp Settings menu. Press MODE/ENTER . The Lamp Settings page is displa yed. Hi ghlight Reset l[...]

Maintenance 72 Ind ic ato rs Light St atus & Desc ription Power even t s Orange Off Off Stand-by mode. Green Flashing Off Off Pow e r i n g u p. Green Off Off Normal operation. Orange Flashing Off Off • The project or needs 90 sec onds t o cool d own as it was abnormally shut d own without the normal cooling do wn process. • The projector n[...]

Troubleshooting 73 T r oubleshooting The projector does not turn on. No pi c t u r e Blurred image Remot e control d oes not work The password is incorrect Cause Remedy There is no power from the power cord. Plug the power cord into the AC power jack on the projector , and plug the power cord into the power outlet. If the power outlet has a switch,[...]

Specifications 74 Specifications Pr ojector specifications All specifications are subject to change without notice. Optical Re so l u t io n 1024 x 768 X GA Display system 1-CHIP DMD Lens F/Number F = 2.45 Lamp 300 W lamp Electrical Pow e r s u p p ly A C100–240V , 4.88 A, 50-60 Hz (A utomatic) Pow e r c o n s u m p t i o n 488 W (Max); < 0.5 [...]

Specificatio ns 75 Dimensions 339 mm (W ) x 120.5 mm (H) x 252 mm (D) Ceiling mount installation 339 252 120.5 42 50.5 448 397.40 364.40 130 191 237.4 133 87 228 149.50 84 242.04 339 Ceiling Mount screw: M4 x 8 (Max L = 8 mm) Unit: mm[...]

Specifications 76 Ti m i n g ch a r t Supported timing for PC input *Supported timing for non-3D and 3D signal wi th Frame Sequential and Top-Bottom format. ** Supported timing for non-3D and 3D signal w ith Frame Sequential format. *** Supported timing for non-3D and 3D signal wi th Top-Bottom format. Resolution Mode V ertical Frequency (Hz) Horiz[...]

Specificatio ns 77 Supported timing for HDMI (HD CP) input *Supported timing for non-3D and 3D signal wi th Frame Sequential and Top-Bottom format. ** Supported timing for non-3D and 3D signal w ith Frame Sequential format. *** Supported timing for non-3D and 3D signal wi th Top-Bottom format. Resolution Mode V ertical Frequency (Hz) Horizontal Fre[...]

Specifications 78 Displaying a 1080i(1 125i)@60Hz or 1080i(1 125i)@50Hz signal may result in slight image vibration. ** Supported timing for non-3D and 3D signal w ith Frame Sequential format. Supported timing for Component-YP b P r input Displaying a 1080i(1 125i)@60Hz or 1080i(1 125i)@50Hz signal may result in slight image vibration. ** Supported[...]

Warranty and Copyright informatio n 79 W ar r anty and Copyr ig ht information Limited warrant y BenQ warra nts this product against any defects in material and workmanship, under normal usage and storage. Proof of p urcha se date w il l b e re quire d w i th a n y warranty claim. In the event this product is found to be defect ive within the war r[...]