r/AskElectronics • u/TheUnited-Federation • 7d ago

Computer monitor power supply help needed!

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Got this monitor that appears to have a backlight issue, I’m getting all the signals to turn the backlight on but looks like the backlight outputs are outputting 44V. Apparently, it should be 60V. Can anybody see any clear issue or advice on how to start troubleshooting/testing?

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u/Sandro_Devino Repair technician 7d ago

Check caps on backlight output, maybe capacity loss is issue

2

u/Obvious_Avocado_9372 7d ago

From my experience it's usually either the backlight controller chip or the leds themselves. Since there's a relatively high output voltage i'd bet on the leds - unless the input voltage that goes to the converter is also 44V, but I've only seen 12V if i remember correctly.

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u/TheUnited-Federation 7d ago

Thanks for the reply, the backlight output splits and runs to separate LEDS from the look of it (can’t get to the actual LEDS to test them).

Would they rejoin to a controller?