There is a BIOS hack which is required - as far as I can recall, it's been a while - for T20 to accept and work properly with anything above 750Mhz...
Some very old threads on Bill Morrow's ThinkPad Forum address this issue... Good luck. Cheers, George -----Original Message----- From: Mike Brazil <[email protected]> To: thinkpad <[email protected]> Sent: Thu, Dec 29, 2011 6:07 pm Subject: [Thinkpad] T20 won't boot XP with a 1 GHz PIII I found this list in a Google search, and I hope it's still active. I've got a Thinkpad T20 that I hadn't used for several years. I decided to upgrade it as much as possible for some specific applications that it should be able to handle, but I'm having a problem with one of the upgrades. It had a 700 MHz PIII CPU, so I picked up a 1 GHz SL53S PIII and a fan from a T22 on ebay. When I installed the CPU and the fan, it seemed to be working properly, as the POST completed ok, including the memory test (all 512 MB). The only anomaly during the POST is that it shows the 1 GHz chip as an 800 MHz chip. It's obviously recognizing a faster chip, since it showed the old one correctly as a 700 MHz chip. However, Windows XP, which was running ok on the 700 MHz chip, hangs during the boot on the 1 GHz chip. It gets as far as the activity indicator that's shown during the boot, but after a few seconds, it hangs. It does this at exactly the same time every time I try to boot XP, and I don't think it's got anything to do with temperature, as it's got the T22 fan, and I thoroughly cleaned both the chip and the fan before applying Arctic Silver and installing the fan. Also, if I try to reboot it after XP hangs during the boot, it goes through the POST ok again, and XP starts to boot again and hangs at the same point. If it were running too hot, I'd expect to see problems with the POST and would expect XP to either hang sooner or not begin to boot at all. I've got the latest BIOS update installed (1.22) along with all the latest software and driver updates available from Lenovo. I'm kind of at a loss at this point, as I can't think of anything else to try. I've read that the T20 will work fine with a 1 GHz chip as long as you use a fan from a T21 or T22, but that doesn't seem to be the case for this one. Is there anything I'm overlooking, like a BIOS setting or something along those lines to get it to properly recognize the 1 GHz chip and for XP to boot properly? -- Mike Brazil [email protected] _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad _______________________________________________ Thinkpad mailing list [email protected] http://stderr.org/cgi-bin/mailman/listinfo/thinkpad
