I have a M1210 that suffers from frequent crashes - no drive activity,black screen, fan still runs, power light on, occasionally will reboot on it's own. I barely get 5 minutes before a crash.
The temps on the cpu, gpu, ram and chipset never get up to 40c. The fan works on low and high speed, and I usually have it set to run constantly, usually on high. I use 18kfangui to monitor and control.
If I set it on an external fan blowing into the fan vent, It will run for hours with no problem. I browsed to a streaming video news site and let it run for about 4 hours this morning. When I cut the external fan, even with the internal fan running on high and temps still low, it crashed after a few minutes.
I ran the full set of diagnostics on boot, and the full set on the Dell website. No problems found.
Any ideas?