reboot power issue

Custom / CUSTOM
January 2, 2012 at 01:43:00
Specs: Vista Home, athlon fx 4400/ 2gb
laptop (compaq 8510p) works great except for when I have to reboot :(
It does post and sometimes makes it to the windows logo then it reboots. My first troubleshooting step was to see if it was the power supply, but it does the same thing with the battery. All though if I have it plugged in with the battery and unplug it, it does stop the constant reboot, till I hit the power button that is. I have to let it set anywhere between 10-20 secs and then maybe it boots up. Once it makes it to windows it seems to be ok. What could my problem be? I do have some thermal compound I'm gonna regunk the gfx & cpu and see if it's a cooling problem perhaps.

Truth can become lie, but if lies become truth we're in trouble.


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#1
January 2, 2012 at 04:50:11
Have you got the most recent bios? i think it is f.15 you might have f.14. have you added any ram? or changed the processor? if it was an over heating problem it would just turn off completely and not reboot. i was having a problem like yours but i had an old bios and i upgraded the processor. but when i updated the bios and the processor driver. it starts and reboots fine within 40 seconds which is great for a compaq c740.

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#2
January 2, 2012 at 06:33:06
"I do have some thermal compound I'm gonna regunk the gfx & cpu and see if it's a cooling problem perhaps"

Why would you suspect overheating, have you checked the temps & they're too high? Or is that strictly a guess? Have you ever taken a laptop apart? It's no where near as easy as working on a desktop. And your use of the word "gunk" bothers me. Hopefully you realize the amount of paste that you should be using varies depending on the CPU. Some require just a tiny dab, some use a vertical line, some use a horizontal line. And the paste should NOT be spread. Apply the paste incorrectly & your problems will get even worse. That being said, paste does NOT wear out & if it was applied correctly in the 1st place, never has to be re-done. If you do have an overheating problem, it's because of dirt/dust buildup in the cooling vents. Try a blast of compressed air.


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#3
January 3, 2012 at 22:26:16
To the bios question yes I have the latest installed. I don't know what else the problem could be. I even tried resoldering the powerjack contacts(just reheated them so they look shiny) with no success but the problem does seem like a power issue it isn't the battery or power adapter and I'm doubtful it was a cold solder. I'm really stumped.

As far as heat problems the thermal paste looked dried the last time I checked, I was under the impression you have to reapply it if you've taken the heatsinks out which I have. The vents are clean.

I suspected it was a heat issue cause once I let the computer "rest" a bit like say a min or two It will more than likely boot normally. There has been occasions where it just does the same thing. This problem is really random.

Truth can become lie, but if lies become truth we're in trouble.


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#4
January 5, 2012 at 18:17:13
Your next step should be what riider said and clear any dust from the cooling vents, it would be better to take the fan away and clear it.

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