Is there a way to troubleshoot the thermal issues without parts?
I have a Lenovo T420 and the thermals of the computer are not exactly accurate. I am wondering if I can try anything before I buy new parts, since I'm closer to comfort then I want to be with the expected part costs to repair the entire system as it is. It would be nice if I could recalibrate the tempreature sensors and seeing what that does, but I can't find a clear way to do it.
As of now, I have tried the following fixes:
- Heatsink removal (dusting purposes)
- New TIM (Artic MX-4)
Neither of these fixed it, so I took the keyboard off to get an average on how hot the heatsink measures vs. what the computer reports, and this is why the readout is highly suspect.
Before I mention the readout from the measurements I took without the keyboard, this is what I get with Aida64:
As far as measurements from the heatsink itself, this is what I get with an IR thermometer:
- Vent: 57.6-67.8c
- Rear vent: 60c
- CPU plate: 61.2-66.6c
- Heatpipe: 35.2-52.4c
I have also measured it with a thermalcouple and did some datalogging from my multimeter, and this is what I got:
Heatpipe area 1:
Heatpipe area 2 (opposite side measurement)