Skip to main content
Welcome guest. | Register | Login | Post

Computer wouldn't start up unless unplugged and plugged

3 replies [Last post]
libervisco's picture
Offline
Joined: 2006-05-04

I am wondering if anyone else had any experience with this sort of thing. Today when I was firing up my computer it wouldn't start. The power gets on, but it gets stuck in a loop when loading the hard drive and DVD device. It reminded me of an issue with an old computer where I also suspected an inadequate power supply.

But it is weird how can merely unplugging a computer and then plugging it back in solve the issue (for that particular case)? Could it be that the power supply somehow retains a residual amount of electricity in it which prevents it from starting up properly?

Since this is a power supply that came with the case, for which some say should be replaced because are usually of low quality, would you recommend buying a new one?

Of course, if anyone believes it might be related to something other than a PSU please say.. though I can hardly imagine, this being mostly newer components (motherboard, CPU, memory, DVD, fans, all from 2007 and only HD from 2006 or so).

Thank you

tbuitenh's picture
Offline
Joined: 2005-12-21
A computer is supposed to

A computer is supposed to have two power switches. One switch at the front that isn't really a switch but a button (you might actually call this a standby button), and one tumble switch at the back/power supply, which is equivalent to the plug.

I'm not sure what exactly is switched on and off by pressing the front button, but I suppose it sends a signal to the power supply to power the motherboard on/off, and to switch on or go standby itself. That would mean there's something wrong with your power supply.

You could buy one of those power strips with a switch on it. It will save electricity when the computer is off (everything plugged in it will be really off instead of standby) and if you buy one with a surge protector (don't confuse with overload protector) it will save you a lot of money if something ever goes wrong in the power grid (eg lightning strikes). It would be a cheap solution to your problem, but I expect you'll need to buy a new PSU soon anyway.

libervisco's picture
Offline
Joined: 2006-05-04
Well, I talked about this

Well, I talked about this issue on #hardware on freenode too and after some digging I was referred to others who seem to have had a similar issue, apparently called "cold boot", with this motherboard. The BIOS upgrade could be resolving it. So one thing that could be happening is just that, an occasional BIOS glitch.

This sort of thing only happened about two times before since I have this computer though (since May, 2007).

So right now I can't blame exclusively the PSU. If it is just a BIOS glitch then flashing it to the latest version could help. And since I've never done it before, and found a really easy way to do it (although involving booting into windows) using an @BIOS utility that came with the motherboard CD, I did it in a matter of minutes, auto-downloading the new BIOS from the net and flashing it directly. I made a backup of the old one though. That's an upgrade from F10 to F12, which apparently has some IO improvements too. Smiling

So we'll see for now. I wont rush with any purchases. It might as well be that the current power supply, claiming it is 400W, is fine. I'll probably get a better quality one at some point, especially if I encounter this issue again, but no need to do it just yet.

About the power switches.. it doesn't have one on the back. The box just has "power" and "reset" buttons on the front.

About surge protection, what I usually do when I see the storm coming is turn it off and completely unplug the whole strip from the wall. But I should consider getting a surge protected one before summer (and lightning storms) hit us. Smiling

Thanks for advice.

tbuitenh's picture
Offline
Joined: 2005-12-21
save power
libervisco wrote:

About surge protection, what I usually do when I see the storm coming is turn it off and completely unplug the whole strip from the wall.

That might not be quick enough, but I have to admit I do the same thing with my laptop. It's only one plug, so I don't really see the point of getting a strip with a switch (to easily save power), except for having surge protection.

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.