Yesterday my Desktop PC (Windows 7 64bit, Intel i7, basic water cool fan) started to shutdown on its own within minutes of start-up. I sarted it and went into BIOS to monitor the temp. I watched CPU temp creep from 40c to 80c in less than a minute and then it would power down shortly after hitting 80c.
The state of the PC before problem: I had not cleaned it in over a year. It experienced a sudden loss of power (breaker blew) a maybe a week before the issue and worked fine until yesterday.
The issue arrived RIGHT after I rearranged my office. I carefully moved the PC to a table and then back to the desk. I did not jostle it or drop it or anything - I only mention the moving of it because I experienced the issue on the first start-up after move.
Steps I have taken:
1. I have cleaned the internal components and fans, etc with condensed air.
2. I have fixed a kink in one of the two hoses in the colling unit. ( I used zip ties to force the kink out of the hose. - I am fairly certain that this kink was around for awhile before the overheating presented itself.)
3. I have removed and applied thermal paste, using Artic Silver 5 and the vertical line method. (I was careful to clean and tint the surface of the cooling unit and the processor)
4. After the above steps were taken the CPU was still starting at around 35-40c and jumping up to 8-c within a minute. So, I have attemped the removal and reapplication of the thermal paste with no results.
I'm wondering what steps I should take next.