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Computer shuts down 2 seconds after turning on

N

nottek

Junior Member
I have built a computer with all new components. It boots up fine until I install a cdrom drive. The fans whir then 2 seconds later the computer shuts off. Same result for 2 different drives. If, however, I turn on the computer with the power to the drive in question unplugged then wait 20 seconds I can plug in the power to the new drive and the computer will stay on and the drive will work just fine. I just can't start the computer with the power to the new drive plugged in. Any ideas?
 
I'd guess there's a short or bad connection in the mobo drive connector or cable. The power supply detects the overload and shuts down. If you wait until S/W had time to initialize the board's chips, their behavior changes enough to prevent the overload.

RMA the board.

(try a different cable first).
 
I would wonder if your PSU was at the edge of its capacity. Isn't it the case that when you boot, both your DVD drives spin-up (noisely) for a couple of seconds? That's a simultaneous max-power-load from both DVD's, if so. You could test this by dropping other power-loads to see if that allows both DVD's and a successful boot: disconnect all (non-cpu) fans and pull any unnecessary (for boot) cards [such as sound, NIC, SLI'd GPU, TV-capture, etc.]. If reducing the power-load from other devices let's the system boot w/ 2 DVD's, buying a newer/more-capable PSU is an obvious solution.

You haven't specified the cabling method: on an IDE cable, there's a slight chance the cable could have some defect: swap with another cable just to check it. This is pretty unlikely.

Once upon a time, BIOS's had the option of sequenced powering-up HD drives. That might also have included CD/DVD drives, but I never needed it. The purpose was to avoid the simultaneous power-demand of all the drives starting at once. I haven't looked into this of late, but it might still an obscure BIOS option. [Since I -haven't- noticed it for several years, I doubt it still exists, however.]

Good luck!
 
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