T61 Lock-ups

My new T61 laptop is freezing, typically after 5-10 minutes of inactivity, but every once in a while I’m using it. It seems as if I’m actively using it, it won’t freeze up, but soon as I stop, within 5-10 minutes it just hard locks. I’ve used my T61 up to two hours without lock-ups, set it aside, and bam, frozen.

I’ve browsed through the /var/logs/messages file a number of times, but I don’t see anything in the file – just the reboot messages. I spent 3 hours last night running Memtest86, and my memory passed all the tests. I also re-formatted and re-installed Foresight a second time. I can’t figure it out.

I would really hate to have to re-install Vista to see if it happens there too before calling Lenovo’s warranty service.

Anyone have any ideas?

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