Hi,
So after a long wait, I finally got the Arctic Silver 5 thermal paste delivered and I applied it to the processor , the graphics chip and 3 other chips that I am not sure what they were (they had detachable heat-sinks and had some old thermal paste on them, so I just replaced it)
However when put the laptop back together, I had the same issue with the red lines on the boot logo and it shutting down abruptly after 3-4 min. However the temperatures in the Hardware monitor was definitely lower than before.
I tried it on once again today, and now the red lines from the boot screen logo have disappeared. But it still shuts down abruptly. One thing I noticed is that on startup the system fan does not come on. However it turns on after some time on its own. Could this be that the fan is bad and needs to be replaced? Or since it eventually does turn on, does it mean that the voltage to the fan is not adequate initially? Any idea how I should proceed debugging this? (Once the fan does come on, it runs at maximum speed with a lot of noise and then after a minute the laptop powers off)
