Backlight problem on HP EliteBook 6930p

[mrjoey98]

Hello all,

I took it upon myself to fix a screen issue with an EliteBook 6930p; I brought a new LCD panel, and while I was able to get everything sorted out and in the right place, the first thing I noticed when I turned the computer on was that nothing was on the screen. I saw something turn on, but the screen was totally black. I then switched out the new screen with the old one, and then I realized that for some reason, on both screens, the backlight wasn't turning on. By the way, I did make sure that the backlight was plugged in correctly on both screens.

I don't know what's causing this and I would really appreciate some insight as to what may be making this happen. As you could very well imagine, this is very frustrating as I took hours to do all of this! 😩

Thanks very much in advance!

[iomare · Accepted solution]

Hi,

Did you replace the display inverter? When the backlight is not working it is the first thing you should replace (or check if working) as it provides the power to the backlight. (in modern Led backlights there is no inverter)

The part number is 487431-001 and you can perform an online search with a part number or try your local computer repair shop and see if they have any used ones lying around.

On page 52 of the service manual, you can see the steps to replace the inverter.

http://h10032.www1.hp.com/ctg/Manual/c02514991

Hope it helps,

David

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