Is the PSU, FW, MB or external device the culprit?????

[swedeintheus]

My music prod. PC has been perfect for a couple of years . The whole system (monitors, displays, subs, synths etc) are on a current sensing switch, controlled by the PC, so when I turn the PC on, everything else turns on too (there is a delay built in). When I shut down the PC everything shuts down as well. All this has been fine, but recently it has come down with a peculiar problem. Unless I power off my FireWire interface BEFORE shutting off the PC, the PC will power off, but start itself 10-15 sec. later. I wonder if anyone has a clue if this is likely a problem with: The PSU, or MB, or the FireWire pci card, or the external interface? BTW, if I turn the interface back on seconds after the PC has shut down, the PC will start up again. If I wait for a minute, it wont. Any ideas, anyone?

 

[CountMike]

What is that external interface ?? UPS ?
Try connecting everything conventionally, without it.

 

[swedeintheus]

What is that external interface ?? UPS ?
Try connecting everything conventionally, without it.

The interface is an Alesis Master control. If I disconnect it, the PC works normally. If it is connected, and left on, the PC will restart. But I don't see why that would necessarily make the Alesis the culprit. Isn't the firewire card just as likely? Or?

 

[CountMike]

Oh, it's a mixer. Only way I could think of is that firewire is somehow set to wake computer up and that setting could be in the BIOS. (Wake up by...) It's very simple connection so it wouldn't work at all if it was faulty.

 

[swedeintheus]

Oh, it's a mixer. Only way I could think of is that firewire is somehow set to wake computer up and that setting could be in the BIOS. (Wake up by...) It's very simple connection so it wouldn't work at all if it was faulty.

Hi, and thanks. Yes, it is puzzling, and it started all of a sudden, without any hardware changes. I have disabled all "wake up" settings, but it still does it. Also, I just noticed, one of my USB ports has gotten "flaky" . It has a wireless keyboard rec/trans, and sometimes that doesn't work. Also all of a sudden.