hello, when I turn on my pc it stays on for a few sec. and than turns off???? what should i be looking for?
458757
This sounds like an overheating problem, you did use heatsink compound, right! Did you reinstall O/S after swapping motherboard?
1031712
Check to make sure the air vents on your PC are free of dust.  It could be over heating or your power supply could be checking out.
1157596
check for viruses (specially when your system booting after connect to internet ) \ncheck power voltage \ncheck  cpu fan \nreinstall win xp \nif cpu fan is good
973133
Black--or blank ?  \n\nIf it's black, then It sounds as if the power saver function might be on the fritz.\nUsually, striking a key or wiggling the mouse brings the last image on the screen back up.  Does the monitor have a small light on the front that is green when the screen is active? If that light turns yellow when the screen goes black, that tells you that the power saver function is on.  \n\nIf it's blank [not black], then I don't know what to tell you.  Call tech support and try not to lose your temper with the overseas representatives.
332938
It could be that your fan has burned out.  If you notice the fan does not come on at all anymore, it's probably time to get a new one.  \n\nSide note... if your computer is in a room that tends to get warm, you're going to want to change that fan soon and/or use another fan (small household oscillating type) to cool your CPU unit.  If your system gets too warm, the whole thing will shut down till it has a chance to cool down again.
978463
ATX type computers always have power being supplied to the motherboard. This is a standby voltage, it is what lets you turn your computer on form the power on button in the front. \n\nI believe you are worried that it isn't turned off because you can see lights in the back of the computer flashing. This is cause of that. Dell I know is one manufacture that dose this. All you have to do is shutdown the computer and turn off the monitor for it to be turned off.
1005303
it will stay power on even do you shut down your computer,  because it has still minimal power as long it is connected to your power strip and it is power on, try to plug off the power strip then you will not get minimal power for the mouse
92079
your pc may be having a problem with 'standby' or 'hybernation' mode.  Just power-off the PC.  If this problem reoccurs, then you can dis-able standby and/or hybernation mode.\n\nthe control is located in start---control panel--power settings.
262543
Check the battery..Go buy a new Battery.. See if it boots up then..If it dosent then it looks like a computer doctor is needed.Could be costly. If its an old one. it might pay you go buy a newer one.
437878
Listen to me!!!  Your computer is very pissed off at you.  When you ignore it for 5 hours, it'll ignore you in return - very much like a woman ;)  I would seek the advice of a professional counsoler.  It wouldn't hurt to buy it/her a new light or fan.  Chocolates and flowers won't cut it.\n\nOK, seriously.  Everyone else is right.  Your computer is going into a power save mode.  You can adjust these settings in "Control Panel -> Power Options".  Just change the first pull down to "Always On".  You can still enter hibernation - click "Turn Off Computer", hold down shift, and click "Stand By".\n\nIf the problem still persists, then look into lights and fans.  Saying I love you once in a while doesn't hurt either.
249505
When this will happen. Will it happen when you run a paricular program...\nIf its happening all the time then its because your cpu is getting heated up.\nGo to bios in that go temperature settings. There you can uncheck auto reboot if you don't want that to happen.\nBut it is recommended
479083
The cmos battery shouldn't stop the computer from booting, it'll just boot with default settings each time. If you have a totally dead box check the power supply first. You should always at least get a fan whirring or something.
615523
There is a fan in your PC that cools down your computer since keeping it on all day will heaten up your hardware. It is probably defective.
238854
You'll likely get various answers as I can already see.  No, it doesn't really damage it but think about this, you turn it off and then immediately turn it back on, one minute 500W (my power supply) of energy is flowing through your system and then not and then immediately it is again.  I hold the belief this causes unnecessary wear and tear on the system and if you are only going to be away from the PC for a short time, put it in standby or for longer times hibernate and shut down at night (or whever you sleep).  But, if you are having a problem with Windows and task manager is not responding, press the reset switch (if you have one) which is a far better solution than turning it off and immediately turning back on again.\n\nJust my take.
438012
If your computer shuts off while you are using it then the problem seems to be your power supply. I had to change it and replaced it with a more powerfull one to correct this problem on my computer and everything worked fine ever since.
485924
Your screen has gone to standby to save power, just wiggle the mouse or click. and it should come back. You go into your computer options and change the preferences so it will not do this as much or not art all
496379
More than likely it is your power supply. Either get a good power supply tester or if you have another power supply try that. Good Luck! ;)