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-   -   ASUS UltraBook UX403U no Backlight (https://www.badcaps.net/forum/showthread.php?t=104935)

mferna14 03-28-2022 04:35 PM

ASUS UltraBook UX403U no Backlight
 
Hi, working on ASUS UltraBook UX403U, it boots up fine but there is no Backlight. I can see the dim image in the background but no Backlight. I checked the Lid switch & is working fine. Replaced with known good LCD screens, still the same. I measured voltages, 19v is present on pin 1~3, but do not get the 3.3 volts. Does anyone have the schematics or the boardview so that I may know the pin-outs?? On board it has the 30-pin LVDS connector. Thanks of help


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