Way to test a monitor panel? | Linus Tech Tips | Page 1

neon quest Nov 29, 2022, 1:32 AM

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Hi all. I have an Acer predator x27 that took a little bump when my monitor arm failed. I'm getting a black screen with no backlight and no LCD activity, but the PC is recognizing the displays connected and the internal fan is running. Is there a way for me to just test the panel to see if it's broken? There are no scratches or deformations and I'm hesitant to buy a $500 panel just to troubleshoot. Thanks!

next tapir Nov 29, 2022, 1:33 AM

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Its just black? No signs of a broken panel?

neon quest Nov 29, 2022, 1:33 AM

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No cracks, no scratches, no dents

next tapir Nov 29, 2022, 1:34 AM

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Backlight may have broke

neon quest Nov 29, 2022, 1:34 AM

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And that is part of the panel assembly, so I would need to replace it.

next tapir Nov 29, 2022, 1:34 AM

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put a flashlight directly up to the panel and see if you can make out anything being displayed

neon quest Nov 29, 2022, 1:36 AM

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I can make stuff out

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So it's the backlight

next tapir Nov 29, 2022, 1:36 AM

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Yep, backlight is either broke, or came unplugged

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I would make sure its plugged in fully before shooting the parts cannon at it

neon quest Nov 29, 2022, 1:37 AM

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Got it. I'll reseat all the cables and if no luck then I'll look at a replacement

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I am assuming there's no way to fix the backlight at home if it broke

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As it's part of the panel?

next tapir Nov 29, 2022, 1:39 AM

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Yeah, sadly, Its a part of the panel

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Take the monitor apart carefully and make sure the cables are plugged all the way in

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If they are, then pull the trigger on the parts cannon

neon quest Nov 29, 2022, 1:44 AM

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Yep they are all plugged in tight, and no backlight

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Parts cannon it is. Thanks for all your help!

#Way to test a monitor panel?