Compaq Presario CQ61 Notebook

February 5, 2011 at 01:53:28
Specs: vista, 4 gigs ram
My daughter been using laptop on bed, result became dusty. Friend cleaned it but forgot to replace thermal past. She has been using it and it would shut down but she didn't tell me, she would wait 10 minutes and start it up again. Would be ok for a while but when she needed to do something that required the system to work hard like play SIMS it shut down. She bought the computer to me when it started to shut down before loading operating system. I was able to get into the bios and do some checks. Hard drive and memory are fine so I am thinking it is the fan or cpu or both. I have now taken the computer apart to check the thermal past and it is the cause of the problem but as a result of her not getting it fixed has it caused more damage. When I was in the bios the fan did not come on. but if I was able to get into the bios then the cpu must be ok 'right' not sure??. My understanding is if the CPU is not working the computer won't go. It will not boot at all. If the fan is faulty it will boot but power down once it over heats??. I don't want to spend more money then I need to (single mum stupid daughter) If I take the fan-heat sink into a repairer they should be able to test it to see if it is faulty? do you think that if I replace the thermal past it should be fine. There is no browning on the power supply to the fan and there is no visual signs of overheating.

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February 5, 2011 at 02:48:01
"do you think that if I replace the thermal past it should be fine. There is no browning on the power supply to the fan and there is no visual signs of overheating. "

Maybe...maybe not. If the CPU did overheat, it may (or may not) have done more damage than just a re-pasting will correct. And there's an "art" about applying thermal paste (the key being to apply only enough to have a thin layer between the CPU and heatsink/fan assembly):

Also, you won't likely see any damage to a CPU by merely looking at the power supply. Just because it may have overheated doesn't mean that the power supply suffered any damage (though a severe overheating issue could possibly damage it---but in that case you'd likely see more evidence on the main-board itself).

"Channeling the spirit of jboy..."

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February 5, 2011 at 04:26:20
Yes it's true if the cpu is bad u won't see anything onscreen. The system shutdown because of the cpu is protecting itself.
Are u sure the cpu heatsink fan is connected?
All u need to do is apply new thermal paste.

We can not fight new wars with old weapons, let he who desires peace prepare for war - PROPHET.

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February 5, 2011 at 04:58:48
Thanks for your fast reply
yes it was connected. I noticed when my daughter was using the computer the fan was working hard, a bit annoyed with myself for not checking then, also when I dismantled the laptop I made sure the power connection was good and solid.

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February 5, 2011 at 05:06:54
Great link Thank you. I suspected the only way of knowing if the cpu is damaged is by going through the process of elimination and error checking, and me being lazy about reassembling and then taking it apart again.

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February 7, 2011 at 00:07:51
Thank you for your help. Perfect result. Past was the problem and all back together again and running much cooler now.

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