> On Tue, 2007-09-11 at 13:19 +0000, gjgowey at tmo.blackberry.net wrote: > > I have one idea that may work. Try seeing if your bios supports a > bios upgrade floppy (it would say so in the owners manual). Now by > bios upgrade floppy I don't mean the usual type that use an os. There > are some that the bios will directly read from without an os being > used. The concept is to recover from failed bios upgrades. The > reason I suggest this is because I think the setting that's keeping > your system off is hiding in your bios' acpi table and I don't think a > bios reset will dump it, but a bios upgrade might. > > My motherboard do support such BIOS upgrades (really nice since it's > OS > independent) but you need to get to the POST before you can ask it to > search for the floppy. > > But it won't power on at all. The CPU FAN doesn't start, the disk > doesn't rotate, the monitor doesn't get any signal. The only thing > that > indicates the slightest sign of life is the LED on the motherboard and > my keyboard if I press Num Lock. > > Is there something on the motherboard I can disconnect to reset the > ACPI > table? Seems to me there is room to suspect a hardware issue instead of acpi. I would confirm power supply connector to mainboard by removing and reinserting until properly seated. Also would confirm two wires from power button on case/chassis are correctly connected to proper pin terminals at edge of mainboard. If still no joy, would swap a known good power supply. If that fails, you might try removing the power switch leads from the pin terminal strip and use a phillips screwdriver blade or other appropriate tool to short the proper pins momentarily to start the beast. I have replaced three bad power switches in the recent few years, so they do fail. Cheers, B.J. CentOS 5.0, Linux 2.6.18-8.1.8.el5 x86_64 12:06:49 up 1 day, 6:14, 2 users, load average: 0.03, 0.05, 0.07 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos/attachments/20070911/8165f706/attachment-0005.html>