This unit shuts itself down after a minute or so. If I try to start it back immediately it only runs a few seconds.

I noticed the Heatsink holder (plastic) was broken and not allowing any cooling to the CPU and replaced it.

The unit and fans are all clean.

I changed out the Memory sticks with no change.

I replaced the ac cord with no change.

Any suggestions?

did you put thermal paste between the heatsink and the CPU.

did you put thermal paste between the heatsink and the CPU.

Nope; I didnt have any. I thought about it but hoped it wouldnt make that much difference. I assumed that the heatsink being attached right again might work.

Guess not huh; maybe.

na you should apply some themal paste it makes a difference. unless there is something else wrong with the computer, but the first step would be the termal paste.

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