Solved Compaq Presario f700 screen issues

Compaq / Presario f700
December 2, 2011 at 16:21:20
Specs: Windows Vista, 2.00ghz / 2 gb
On my wife's laptop, a compaq presario f700, the screen is what we would call temperamental. It works sometimes at boot up, but very rarely. Usually, if we're not just leaving it in hibernate (it seems to come back from hibernate fine), we have to boot it up 10-20 times before the screen is anything but black. Even when the screen is black, it works fine with an external monitor, and it's on one right now because I accidentally shut it off and didn't feel like going through the 10-20 boot ups to fix it. I recently did a factory reinstall, for unrelated reasons but with the hope that perhaps it would fix the problem. We saw no change. She claims that it started happening a few months after she bought it, and that HP tech support told her that it wasn't their problem and not covered by the warranty. The case has some damage from being dropped, but she says that happened after the fact. It does, despite being an HP, work perfectly fine sometimes - if it weren't for that, I would just dismiss it as a hardware problem. I've gone to update the drivers multiple times, with it saying each time that the drivers are up to date. My only thought at this point is that something is only partially plugged in,but I don't have the know-how to check that. Boot-ups when the screen works seem to have nothing to do with the angle of the screen, and it only gets "blacked out" again when it's shut down. Any help anyone could offer would be greatly appreciated!

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#1
December 5, 2011 at 15:41:31
Re: "The case has some damage from being dropped, but she says that happened after the fact"

The laptop was dropped? It's a bad LCD panel (or possibly video cable connection) then, especially if the video output is OK on an external monitor.

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#2
December 6, 2011 at 00:06:16
But would it be able to work perfectly fine sometimes if that were the case? I'm on it right now with no problem. It's bright, and there are no dead pixels. I just know that if I turn it off, it won't be again. I'm more or less trying to gather possible solutions so that one of my friends who isn't clueless can attempt to fix it, but he just had a son, so he's a little short on time. The video cable connection that you mention being bad seems a more likely candidate. Being that the damage occurred before I ever laid hands on the laptop, I can't be sure about the timing of the drop. I definitely appreciate the insight.

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#3
December 6, 2011 at 08:17:39
✔ Best Answer
I have an old Dell Latitude C600 that has an intermittent issue with the LCD panel, sometimes I have to TAP the back of the LCD with both hands on either side of the LCD in order to get it to work ----- it's a bad connection somewhere, but I haven't had to rip it apart yet because the tapping temporarily cures the garbled screen (like the old Tube type Televisions - haha).

In your case, if the external video is good ALL the time, you've troubleshooted it to the LCD and that culprits could be:

- LCD panel
- Video connection cable (there's two in the LCD)
- Bad / going bad inverter.
- Bad / going bad LCD bulb (although this is probably NOT the issue - when a bulb goes, the screen is usually dark).

http://www.insidemylaptop.com/remov...

MOOOOooove! OH and you're welcome!


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Related Solutions

#4
December 6, 2011 at 11:30:52
the next time it does it shine a torch at the top of the screen pointing down, if you can barely see the screen and the icons etc, then it is the intverter board not the screen, hope this helps.

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