I tried a lot of things. None of them worked. Over the weekend I threw the computer in the back of a car and took it to Bill Tian at PC Shop near Keele and St. Clair (and a high recommendation for him to all). Told him it didn't get to POST no matter what I did, and to figure it out and replace whatever needed to be replaced. He called me before I got out of the parking lot. The computer booted up just fine. We rebooted it: just fine. I took it home. I've booted it up seven times now, some cold some warm. It boots up with nary a hitch. All I can guess is that the car ride shook something loose or shook out a short. Anyway, I still have no idea what went wrong, but now it seems to have gone right again. Saves the repair/replace fee, at least. When I was trying to diagnose the problem I had the computer standing up, on its side, leaning at an angle, and with (at various times) swapping out the memory, the graphics card, the CMOS battery, the hard drives... everything but the power/MB/CPU. Nothing. Thanks to all for the suggestions. On 1/19/24 16:07, Peter King via talk wrote:
I had a Lenovo Legion T5 that went very bad on me (short story: do not buy this computer!), and while getting a replacement case/motherboard/CPU all set up, hauled out an older computer with which to get work done while the replacement gets up to speed. Well, now this older machine is acting up. For a while it would not boot unless mouse, keyboard, and monitor were all attached. It runs an AMIbios from 2009, and a bit of googling showed that back in the day that did happen as a "feature" of consumer computers (rather than servers). So each time I needed to reboot I just plugged in all that stuff, rebooted, and then unplugged it all again, and the old computer ran just fine. That worked around a dozen times.
Today I set out to reboot the old computer to get some work done, plugged everything in, and ... nothing. Never even got to the BIOS screen. No luck with multiple attempts. Changed the HDMI cable, still nothing. Took off the side panel and saw that when I turn on the power to the system, the CPU fan and the case fans come on, but it doesn't look like anything else does.
It could be the graphics card, or the power supply, or the CMOS battery, or something else.
Any suggestions for what to try next?
-- Peter King peter.king@utoronto.ca Department of Philosophy 170 St. George Street #521 The University of Toronto (416)-946-3170 ofc Toronto, ON M5R 2M8 CANADA
http://individual.utoronto.ca/pking/
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-- Peter King peter.king@utoronto.ca Department of Philosophy 170 St. George Street #521 The University of Toronto (416)-946-3170 ofc Toronto, ON M5R 2M8 CANADA http://individual.utoronto.ca/pking/ ========================================================================= GPG keyID 0x7587EC42 (2B14 A355 46BC 2A16 D0BC 36F5 1FE6 D32A 7587 EC42) gpg --keyserver pgp.mit.edu --recv-keys 7587EC42