Acer B243W manual W/LED No Backlight

Page 37

W/LED No Backlight

W/LED No Backlight

Check the 24V voltage input

NG

OK

Check the adapter

Check ON/OFF signal

NG

OK

Check Interface board

Check the voltage of IC801 pin2

NG

OK

Change Q805.Q806 or Q807

Check the pin1&15 of IC801 have PWM wave

NG

OK

Replace IC801

Check Q802,Q804,Q808,Q809

Drain wave

OK

NG

Replace Q802,Q804,Q808,Q809

Check the output of PT801~PT812

OK

NG

Change PT801~PT812

Check connecter & lamp

37

Image 37

Contents Acer B243W Service Guide Version Service Guide Version and RevisionRelease Date Revision HistoryDisclaimer CopyrightTrademarks ConventionsWarning For FCC Certified Models PrefaceSpecial Notes On LCD Monitors PrecautionsTable Of Contents Chart of B243W Monitor FeaturesChapter IntroductionStandard Test Conditions Electrical RequirementsLCD Monitor General Specification General Specifications LCD Panel SpecificationMechanical Information Electrical Characteristics Optical Specifications Horizontal Support Timing VESA MODESVertical Monitor Block Diagram Crystal Main Board DiagramSoftware Flow Chart Remark Symbol Main Board LayoutInstallation Height Adjustment Screen Position AdjustmentAttaching/Removing The Base Swivel TiltMonitor Pivot External Controls Operating InstructionsFront panel controls eColor Management OSD How to Adjust a Setting Adjusting the picture Page How To Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature LogoUsing The Right Power Cord Disassembly Procedure Machine Disassembly3. Release the shield inverter and lamp connectors. Fig Page Page This chapter provides troubleshooting information for the B243W Troubleshooting1. No Power 2. No Picture LED is orange 3. White screen Is Key Pad Board connecting normally? Y NG Is Button Switch normally? 4. Key BoardConnect Key Board Replace Button Switch Replace Key Board OSD is unstable or not working NG5. Adapter/Inverter Board No power W/LED No Backlight The following figure shows the connector locations on the monitor Connector InformationD-SUB connector DVI Connector Chapter Exploded Diagram Model B243WFRU Field Replaceable Unit List Picture Part ListAdapter Board Inverter Board Main Board USB Board LVDS Cable Main Board Schematic DiagramPOWER INPUT FOR SCALER POWERCABLE DVICONNECTMCUCONNECTION CABLE NOTREVC MST9200A-LF1M X 16bit =512K X 2Bank AUDIOMUTE For HDCPAUDIO AUDIOSTDBY HILVDS INTERFACE CONNECTCN703 CONNON/OFF Adapter boardT5A 250VAC PSON400V THE PIN ADDED FERRITE BEAD THE SOLUTION FOR EMIIn SVT Add it Improve EMIOVP Over Voltage Protation Inverter boardQ810 C829 POWER CONNECTORPOWERKey POWER KeyEEPROM/Config PowerPower Regulator Upstream