PC turns to black in sudden while CPU still run on?
930258
This sounds like a hardware acceleration problem. Go to your display settings.. click on advance.. troubleshoot.. and slide the acceleration to none.  If it doesn't work try updating your video drivers.
1151866
More likely, your fan is bad.  If it was the power supply, you would notice more issues with the actual computer.
21485
This could be a heat problem.  May one of the internal fans has stopped working, mainly the cpu fan.  If it was memory, you would get weird errors all the time.
448257
check your power supply and makes sure it is connected correctly, and make sure the power supply isnt a dud
147653
Your "system idle process" should normally be very high when not much else is happening - it's Windows' way of saying "this is the unused CPU capacity". As far as the light always being on, it may be a software issue. When in doubt, take the machine to a PC shop or trusted friend whose day job is computer repair, and ask them to check for unwanted programs.
1049920
unplug it for a few moments then turn it back on works for m e look for another computer
252039
The behavior you are describing is serious and is probably related either to a configuration with your motherboard, a problem with the CPU or similar.\n\nYou should definitely return it for service.
936973
Sounds like your processor is over heating...that will definitely shut down your computer.
921256
could be something wrong with your PC
564002
there shoudl be a restart button on your cpu.  try that
952909
try to restore your BIOS setting to it's default, remove your Computer Case cover, Then remove the Battery On the Mainboard, plug In the cable, then put the battery back, Turn on your computer.
1090584
This could be a cooling issue, check your fans and dust out your system. I saw one system the other day that did this because of the massive amount of dust, even though the fans were still turning. \nAlso try starting the computer in safe mode and see if it works then or locks up without restarting. A bad XP install will cause this sort of action. Sometimes there is a bios option that tells the system to restart on error, you can turn this off to help diagnose the problem.
867880
I would guess the power supply failed.\nIf the hard drive spins up and you can tell it is booting up you may have a bad video card or a bad monitor.
432385
it seems to be an overclocking problem - the system became instable. reset all clocking values back to the defaults.
361360
ithink there is something wrong in your hardware and try to open run box then write ( msconfig ) then go to srartup and chick the programms thats start in the startup of the computer
351642
1. It could be in Hybernate: try to turn off all power and restart the whole thing from the no-power stage.\n\n2. graphic-card / video setting: \n2.1 there's nothing much you can do if you cant see it but i suggest to turn it all off from the no-power stage and press <del> to go to your BIOS setting. Check if you can mannually overide the settings to a lower mode. If so, try restarting again.\n2.2 from the background, the laptop is starting up with windows but u cant see anything coz the video just might have been toggled with. try pressing <F8> by the time you boot it up, chances are u might be lucky enough to go on safe mode and u can level your video setting to a lower degree.\n\n3. if 1 and 2 doesn't work - i damn hope you have backed up you files coz you have to bring it to a DELL shop\n\nHope I helped you out- coz i had that prob once and # 2 did the trick for me
1148876
It is possibly overheating. Check the fan. Check power supply, it could be going out. If not:\nYou probably need to reorder your BIOS by hitting del on startup. If you dont know how to do this please dont try, get help first.\nHere is a search of this problem, choose one of these forums that seems most similar to your system and ask them. They should be able to help. Its hard to troubleshoot a problem on Yahoo Answers as we cannot easily have continuous dialogue.\n\nGood Luck!\nhttp://www.google.com/search?hl=en&q=computer+restarting+over+and+over