Why did this happen?

Hi anyways my PC has been working great recently (it even worked fine last night) but I turned on my PC today after school and it would freeze at the BIOS screen. The keyboard, mouse, and printer didn't even have any power to them. Anyways the DVD drive opened and closed just fine. But it was totally frozen at the BIOS screen. Anyways I unplugged the PC for about 10-20 minutes and turned it back on. Then it unfroze and my keyboard, printer, and mouse worked again. Right now its working perfectly fine.

Do you think it might have been a loose cable in the tower? I plugged it in a lot tighter. Recently, I am not experiencing any freeze ups, slow downs, and its working like I just got it. I had it for 2 years by the way. I can play most games on it perfectly fine as well.

What do you think the problem was? I mean my system is working just fine and never experience any problems whatsoever.

Thanks!

P.S. I am a software nerd but a hardware noob. Thanks so much for your support!

Also I am talking about the power cord to the tower and NOT the plug-in.

do you remember what alarm code you got?

I didn't get a alarm code. No code of any kind was shown. Not even a BSOD.

I had a Gateway from 2000 to 2003 that used to get bios errors very similar to that till it just stopped working. Not sure what brand yours is. Not sure how yours happened. though It could be the signs that something big to go wrong is coming or just some out of the blue freak thing where the BIOS has a minor bug in it that was corrected. Wonder if the BIOS battery is going bad too?

I'll let y'all know if I get it again. Hopefully it was just a glitch.

if it gets stuck at bios you can clear the CMOS and see if that helps its very easy to do
newbie guide to clearing bios
http://www.pcguide.com/ts/x/comp/mbs...earCMOS-c.html

Quite possibly it was the "power good" signal from the power supply not coming up in time, or some piece of hardware not responding properly to the initial "reset" signal.
The reset problem can be the result of some connection becoming dirty, loose, or oxidized over time. As a preventative measure you can open the computer and make sure all cables are snug and wiggle all cards and RAM sticks in their sockets to help ensure good contact.
If it's the result of a bad signal from the power supply, it could be an indication that the PS is dying, but I wouldn't worry unless it starts happening more often.

While you have the computer open, blow the dust out of it.