IBM T41 on XP, fresh install. Just started using this machine. If it sits doing nothing for a half hour or hour, the screen will be frozen with no cursor visible, and it does not respond to C/A/D. It will suspend properly if done manually. I thought ram, which can trigger lockups, but memtest ran for 7 hr 40 min with no errors.
The XP is a vanilla install, no IBM stuff on it other than an Ultranav driver and a Thinkpad power management driver. Had a bluescreen today while using it, but hadn't set it not to restart yet so I could not copy the error msg.
I have an identical T41 with the same install that behaves properly, so I do not suspect software. Cleaned the fan blades while changing the wireless card and it spins freely. Haven't looked at the heatpipe radiator yet to see if it's clogged. I wonder about heat being an issue, since this is an older laptop.
Did it feel extra warm when it crashed? Heat could be an issue, but if the HSF died, I would suspect it would crash within a minute or two after powering it on. Do you have a restore cd? Couldn't hurt to load it.
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Only used this laptop a few times since my original post. It will also lock up when used, after 5 minutes or half an hour or more. Will not run for over an hour without locking up or bluescreening. I have noticed that the install is slightly different than the one on another T41 and a T40 I got from the same source, all fresh installs. This slight difference and the fact that it ran memtest for over 7 hours make me wonder about software. Using it one evening with repeated lockups also produced these bluescreens: