08-26-2013 05:39 PM
My trusty X200 has recently begun to overheat and shutdown when docked and under heavy CPU load. When this happens, it is insanely hot to touch, so presumably it shuts itself down to prevent permanent damage, which is a good thing.
The room is airconditioned to around 23C and the machine is not in direct sun light. All the cooling vents are clear - it has space to breathe.
I ran some checks this morning and found that under full load, when the CPU is clipping 100C (that's 212 Fahrenheits), the fan is spinning at max ~4600 RPM. Is that normal? I thought I remembered it spinning up at 7000+ RPM a couple of years ago, but I can't find any references to what max fan speed should be. It does seem strangely quiet in recent times...wondering if perhaps the fan isn't getting up to speed anymore.
In case it matters I run Linux but don't touch any of the fan speed stuff in tp_smapi - it always runs in auto mode (hardware determines fan speed).
Some output while under load for a couple of minutes (can't figure out how to paste code on this forum):
gdi2k@x200-1304-ob:~$ cat /proc/acpi/ibm/thermal
temperatures: 99 55 -128 77 44 -128 39 -128 59 63 -128 -128 -128 -128 -128 -128
gdi2k@x200-1304-ob:~$ cat /proc/acpi/ibm/fan
Feedback from other X200 owners or Lenovo welcome!
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08-27-2013 02:36 AM
I've never used an X200 before, but given your description, I'd considering carefully opening it up according to the hardware maintenance manual and cleaning the insides, following by cleaning the fan/heatsink and regreasing or even replacing it, if needed.
08-28-2013 09:21 PM - last edited on 08-28-2013 09:26 PM by zoltanthegypsy
Thanks goretsky, it was a bit of a mission (had to remove motherboard and everything) but I did as you suggested, and the fan was surprisingly clogged:
I suspect there was even more grime in the copper fins, but I couldn't see / photograph it well. Anyway, the Dyson took care of it.
All back up and running now and the fan makes a satisying whooshing sound that it wasn't making anymore before I cleaned it, and the temps never breach 85C under full CPU load, so good progress.
I do of course have that obligatory screw that's always left over after laptop re-assemblies - hope it wasn't too important.
Side note: I found some info about Thinkpad fan RPMs and I think I was mistaken in my first post about max RPMs - for the X200 it doesn't seem to exceed ~4600 RPM.
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