Acer LCD-S243HL service manual Backlight can’t be turned on

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2. Backlight can’t be turned on

No raster?

Yes

LED orange?

Yes

Backlight can’t be turned on.

Yes

Is there 19V

No

voltage on pin23 of IC501,IC503

Yes

 

Is there high-level voltage

No

on pin1of IC501,IC503?

 

Yes

Are CN511 and CN512 connected rightly?

Yes

No

Is Pin24 of IC501,IC503(VREF) 5V?

Yes

No

Is ok L501,L502?

Yes

Check adapter

Yes

Is R501 OK?

No

No

Is IC501,IC503 ok?

No

Check I/F board

R501open

Connecting the output connector again

IC501,IC503 fail

L501,L502 fail

Check feedback circuit

END

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Contents LCD Monitor Acer S243HL Table of Contents Important Safety Notice Main Features Specifications GeneralEnvironmental conditions Operating Specification AccessoriesOperation Specifications StorageSafety, EMC, Ergonomics and Compatibility Requirements Electrostatic Discharge Requirements Condition SpecReliability Items Condition Spec Protection characteristics Condition Spec DC to DC characteristicsStatus Sync Video Power Backlight Power Supply Items SpecificationWhite balance Mode Chromaticity CoordinateBrightness output WarmInput / Output Signal Specifications Audio Brightness uniformity2HDMI VGA Items Condition Specification Timing tableMode Resolution Pixel Clock MHz Sync KHz Sync Hz Audio output Spec DDC dataFunction Specifications Panel general specifications AUOOptical characteristic of LCD panel Color Auto Menu PowerKeypad Function Factory First Second Third Fourth Control Range Default Value OSD StructureDepend on timing & S/N 意大利语 OSD Translation Main menu Noemea NglishDeutsch Français Español Italiano Message menu NonemeaColor management OSD scenario OSD language Nonemea Nglish Main menu意大利语 荷兰语 芬兰语 Dutch 荷兰语 Finnish 芬兰语2Cabinet Material Dimension3Mechanical Specification 4Base Mechanical InterfaceUnit Package Specification Package1S/N Label Carton labelPage Flat Panel Specification Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Acer Exploded Diagram LCD Exploded drawing All Trouble shooting Backlight can’t be turned on Black Screen Bad Screen White screen No volume with PC Audio Input No volume with Hdmi Input Spare Parts List Schematics and Layouts Acer Acer Acer Acer Acer S243HL Key-pad Layout Acer S243HL 轉接板 Layout Assembly and Disassembly Guard S9 Use a screwdriver to lock the screw S15 Use a screwdriver to lock the screws S20 Use a screwdriver to lock the screws S22 Assemble the chassis assembly with stand S26 Assemble the stand with the base