Acer B203W manual No Power, Okng

Page 30

Troubleshooting

Chapter 4

This chapter provides troubleshooting information for the B203W:

1. No Power

No power

Press power key and look if the picture is normal

NG

Please reinsert and make sure the

AC of 100-240 is normal

OKNG

Measure U701 Pin2=3.3V,

NG

OK

Check if X401 oscillate waveforms are normal

NG

Replace X401

OK

Reinsert or check the power section

Measure CN701

OK

Replace U701

Replace U401

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Contents Acer B203W Service Guide Service Guide Version and Revision Version Release Date Revision History TPV modelTrademarks CopyrightDisclaimer ConventionsPreface Precautions Special Notes On LCD MonitorsTable Of Contents Scope Chart of B203WIntroduction DescriptionElectrical Requirements Standard Test ConditionsMeasurement systems LCD Monitor General Specification TTLLCD Panel Specification General Specifications Functional Block DiagramElectrical Characteristics TFT LCD Module－Power Specification Backlight UnitOptical Specifications Support Timing Horizontal VerticalMonitor Block Diagram Main Board Diagram Software Flow Chart Remark Symbol Description Main Board LayoutInstallation Height Adjustment Attaching/Removing The BaseTilt SwivelMonitor Pivot External Controls Front panel controlsEColor Management OSD How to Adjust a Setting Adjusting the picture Page Using The Right Power Cord LogoDisassembly Procedure Page No Power OkngNo Picture LED is orange Panel Power Circuit OK NGKey Board Power Board No power LED No Backlight Connector Information DVI Connector Exploded Diagram Model B203W ChapterPart List Picture DescriptionFFC Cable Main Board To GND From Mvcc to Esdvcc toChange the type of resistor R301 from 0805 to Both 223 and 252 foot-print LAY Power board Feedback Layout CN603 Key board