Acer B243W manual White screen

Page 34

3. White screen

3. White screen

White screen

Measure Q707 base is low level?

NG

X402 oscillate waveform is normal

OK

OK

NG

Replace X402

Check Q705,Q706,Q707 is broken or CN703 solder?

Check U403/U407

NG Check Correspondent	NG
component.

OK

Replace U403/U407

Replace PANEL

34

Image 34

Contents Acer B243W Service Guide Release Date Service Guide Version and RevisionVersion Revision HistoryTrademarks CopyrightDisclaimer ConventionsPreface Warning For FCC Certified ModelsPrecautions Special Notes On LCD MonitorsTable Of Contents Chapter Monitor FeaturesChart of B243W IntroductionElectrical Requirements Standard Test ConditionsLCD Monitor General Specification General Specifications LCD Panel SpecificationMechanical Information Electrical Characteristics Optical Specifications Horizontal Support Timing VESA MODESVertical Monitor Block Diagram Main Board Diagram CrystalSoftware Flow Chart Remark Main Board Layout SymbolInstallation 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 Machine Disassembly Disassembly Procedure3. 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 Connect Key Board Replace Button Switch Replace Key Board 4. Key BoardIs Key Pad Board connecting normally? Y NG Is Button Switch normally? 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 Part List PictureAdapter Board Inverter Board Main Board USB Board LVDS Cable POWER INPUT Schematic DiagramMain Board FOR SCALER POWERCONNECTION DVICONNECTMCUCABLE CABLE NOTMST9200A-LF REVC1M X 16bit =512K X 2Bank AUDIO For HDCPAUDIOMUTE AUDIOSTDBY HICN703 CONNECTLVDS INTERFACE CONNT5A 250VAC Adapter boardON/OFF PSONIn SVT Add it THE PIN ADDED FERRITE BEAD THE SOLUTION FOR EMI400V Improve EMIOVP Over Voltage Protation Inverter boardQ810 C829 POWERKey CONNECTORPOWER POWER KeyPower Regulator PowerEEPROM/Config Upstream