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HP Pavillion G7 Strange Issues - Motherboard?

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  • Laptops
  • Hewlett Packard
  • Motherboards
Last response: in Laptop Tech Support
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September 17, 2014 10:35:17 PM

Hey all,

Working on an HP Pavillion G7, and I'm pretty sure the motherboard is gone, but I'm not positive. I've tried the obvious things (removing the battery, letting it lose all charge, reseating the RAM and hard drive, etc.) Here are the symptoms:

- When turned off, immediately comes back on (even if you hold power button down and it shuts off...a few seconds later and back it comes); only way to get it off off is to take the battery out and unplug power.
- Screen tends to start flickering and occasionally display a bar pattern; this is intermittant.
- Sometimes beeps for over a minute when started (it's NOT a beep code...almost like a key is stuck, but none seem stuck; this comes and goes as well).
- In BIOS screen, if something's highlighted like, say, the time, it'll be fine, then start jerkily decreasing (again, like the down key was being pressed, but it's not...and temporarily stops if you do press it, but then starts doing it again).
- Doesn't try to boot to the hard drive; goes to some UEFI browser instead, but that seems bugged/slow.

I did get it to complete a memory test successfully, but other than that I can't get it to do much.

Ideas? Would it be worth investigating anything by taking it totally apart, or is the MB definitely hosed?

THANKS!

More about : pavillion strange issues motherboard

September 19, 2014 2:38:09 PM

Gonna try one bump - hope nobody minds. Thanks!
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a c 252 D Laptop
a b α HP
a b V Motherboard
September 19, 2014 4:44:31 PM

Hi, it will be worth to disassemble the laptop, you have nothing to loose. Start removing the HDD if you have more than one stick of RAM, use only one, remove the DVD and disconnect the keyboard. Look if you have the same problem. Come back with the result, and we try something else for the next step.
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September 19, 2014 9:44:29 PM

Thanks! Love your TARDIS avatar, by the way! I already tried reseating RAM and hard drive, but might as well go the rest of the way. I'll look up a guide to get it apart. Might be next week before I can do this, but will let you know!
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September 30, 2014 11:18:56 PM

Just to update this, taking it apart did yield some success - with the keyboard disconnected, it doesn't behave this way, and an external keyboard works fine. I see nothing physically wrong, so we're gonna try a replacement keyboard and cross our fingers. Thanks again!
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October 2, 2014 10:27:36 PM

Final update - it was indeed the keyboard. Still some OS issues, but I can work with those! Thanks again!
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a c 252 D Laptop
a b α HP
a b V Motherboard
October 2, 2014 11:45:55 PM

I'm glad I could help you, you were on the right track when you said "(again, like the down key was being pressed, but it's not...and temporarily stops if you do press it, but then starts doing it again)", it was the keyboard who was the problem.
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