12/27/2017 (Wed) 19:26:04
I should have also stated that reaching the heatsink to apply new thermal paste is a major pain in the ass when it comes to Thinkpads (If you don't already know, you need to remove the entire motherboard. This applies to the X60 and X200 laptops I have, I have no idea if this applies to other models...).>Would guess it's not been a problem until now because you don't put your laptop under stress or leave it on for extended periods.
It was most likely a software-related problem, the fan didn't turn on at the time, but works perfectly, but my Thinkpad has been the subject of a strange problem recently, the laptop AC adapter connection turns off and on like a linear "beeping" and a clearly audible high pitched whine emanates from the motherboard, specifically below the CPU where there is an abundance of capacitors...>While you're at it I would dust your vents to prevent air flow blockage also.
It gets done daily, the keyboard requires a total of four screws to be removed, and fastest measured time I have gotten it done was in eight seconds.