Acer H235H manual No Picture LED is orange

Page 37

2. No Picture (LED is orange)

No picture

The button if under	NG
control

OK

Measure U104 Pin2=1.8V, U103 PIN2=3.3V

OK

X401 oscillate waveform is normal

X401 oscillate waveform is normal

OK

Check reset circuit of

U401 is normal

OK

Replace U401

NG

NG

Replace X401

NG	Check Correspondent
	component

NG

OK

Check HS/VS from

CN402 is normal

NG

OK

Replace U401

Check CN101, U104 and U103

Replace X401

Check Correspondent component

36

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Contents Acer H235H Service Guide Service Guide Version and Revision Disclaimer CopyrightTrademarks ConventionsPreface Special Notes on LCD Monitors PrecautionsTable Of Contents Introduction Chart of H235HScope DescriptionStandard Test Conditions Electrical Requirements of H235HMeasurement systems LCD Monitor General Specification 55.2 41.4 General Specifications LCD Panel Specification of H235HElectrical Characteristics Optical Specifications Page Factory Preset Timing of H235H Monitor Block Diagram Main Board Diagram Power Board Diagram Software Flow Chart Remark Main Board Layout Symbol Description Installation Attaching the Base Screen Position AdjustmentFront panel controls Page How to Adjust a Setting Page Using the Right Power Cord Disassembly Procedure Tool for disassembly is as followsPage Page Page Lvds cable Remove the five screws remarked in red Page Panel No Power No Picture LED is orange OK NG Panel Power CircuitKey Board No power Power BoardNo Backlight Connector Information Pin color display signal cable FRU Field Replaceable Unit List Chapter Exploded Diagram Model H235HDescription TPV Part No Acer Part no `ty Picture Description TPV Part No Acer Part no Part ListCBPCRA6ABQ4 TO252 Main BoardRED TSUMO58GDJ-LF-1 Lvds Wafer Connect Hdmisel Output IC with Heat-sink90G6119-1 KBP208G Power boardXxxx