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Screen backlight flashes once then no backlight

Hi,

I have a ActivPanel that seems to be acting up. After powering off and powering back on the display flashes its backlight once then turns off. After looking through the backlight with a flashlight I can see the pixels are working.

Any pointers would be significantly appreciated. Any advise is great advise. I am leaning towards a power supply failure but none of the caps appear bad.

I am happy to provide pictures if anyone requests.

Thank you!

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@compjinxmagic explain this "After looking through the backlight with a flashlight I can see the pixels are working" a bit better. Not sure what you mean working pixels etc. If you mean you can see shapes, forms, etc. when you shine a light at your panel, then this issue is a backlight issue. Most likely not from the power board but from the backlight array.

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Hey @oldturkey03!

When I say the above I mean I can see an image showing. I had the power supply board sent off to a repair shop but they are claiming it is working as normal. I am a bit stumped.

Not sure how to proceed.

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@compjinxmagic absolutely possible. From my own experiences, this sounds, looks and smells like ;-)bad led backlights.

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@oldturkey03 Thanks, unfortunately I made the mistake of shorting a 5v rail to a 12v so I fried the board. *facepalm*. Looking into buying a new one or sending this one off for repairs.

After taking more measurements with the multimeter before I messed up I saw the voltage was dropping when the backlight was supposed to be powered; only receiving 5v to the rail that starts @ 12v when first powered.

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Corey Meyer will be eternally grateful.
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