Thinkpads Forum

Hello,
I have upgraded my T61 8889 with a new cpu t7300>T7700 and 2go>4go for ram.

But now when i start my t61 he shutdown after 2-5min and the sector logo on back of screen is not ligthed in green after shutdown.

I have reinstall old cpu and ram for test but the problem still persist.

someone could help me with this problem.

Did you first clean off the old thermal paste from CPU and cooler?
And did you then apply fresh thermal paste (like Arctic Silver 5) on the CPU?
Sounds like the CPU is overheating.

Yes i have add thermal paste on cpu , but not cleaned the cooler.

The old gunk is probably preventing proper contact.
Clean both CPU and cooler surfaces with Isopropyl alcohol (or Isopropanol).
While you have the cooler off, unlock the CPU, take it out and put it back in exactly the way it was, then lock it again.
Then apply fresh paste again (only on the CPU) in the size of about a rice corn, and spread that out evenly, using e.g. a credit card.
Don't forget to reattach the fan-connector.

It's good
I have clean both and add again on them thermal paste.

your first impression was the correct

thx

Glad to hear you got it going again!

If this system has nVidia graphics you really need to get some software to monitor your temperatures. If you don't get the heatsink perfectly seated you're going to have a dead system board soon. Thinkpad fan control (tpfancontrol.com) will work, the gpu temp should always be lower then the cpu during light use and your temps should be in low 60s at idle and 70s undeer load, perhaps 80s under heavy load, but if it gets near 90, shut down and fix it asap.