laptop cpu failure after too much thermal compound is applied?
Posted on 2009-05-14
Hi I have a friend and he brought me his laptop for repair. It said "OS NOT FOUND". I removed the hard drive and found liquid damage.
Its an older laptop, a compaq presario 900.
I suspected more liquid got inside, but after removing the circuit board, I saw the only place liquid hit was the hard drive- no other components were effected. So I put it back together and installed a new drive. Douring disasembly the only problem I noted was some of the plugs were hard to remove (the lcd plugs) due to the computer being real old, and the plastic connectors were real stuck together. I managed to get them appart though.
I powered it up after I connected the keyboard just to test it- I noticed the cpu fan did not go on at all. I saw a tiny bit of smoke and I unplugged the power chord. I realized I put alittle too much thermal component on the cpu area, and alittle got under the clear foil covering the chips arround the cpu, causing the smoke.
Now I put the proper ammount on, and press power. The lights go on, but no fan. It takes the fan about 5 seconds to go on. The fan spins, and it keeps the cpu area cool- but no lcd anymore. I figured maybe I ripped 1 of the wires when I had a hard time taking it apart, so I plugged a monitor into the back of the laptop and powered it up- if a cable ripped then I should still see a picture on the vga monitor But nothing appears. The light on the monitor doesnt turn green- just stays orange.
From the info I mentioned, does it seam I may have kiled the processor when it heated up? I am 100% positave there is no other area with liquid damage, as I do liquid damage repair on mobile cell phones at my work, so I know what to look for and I am positive nothing else is liquid damaged.
PS the processor is an amd athlon xp 1600