I f I let my PC sit for a few hours I can get to the BIOS Setup screen/or windows. After about a minute if I am in windows the monitor loses the signal. If I am in the BIOS Setup the scree n freezes and nothing changes. After that if I resetart he pc (turning power supply off unplugging and waiting 1 minutes). I monitor gets signal for a shorter period of time then the same thing happens. Eventually the Monitor never gets signal. Once again if I wait for some time, usually an hour, the monitor will get a signal for a short and lost it. The first thing I did was get a new graphics card. It didn't fix the issue. I have disconnected/removed everything but the power supply and graphics card and the same issue. I have removed the memory and installed only one module and got the same issue. The same happened when I swapped the modules, so I don't think it is a bad RAM issue.
This is probably an over heating CPU(processor). Make sure the fan over the processor is working. If it is, check to see if the heat sink is fastened properly to the motherboard - if you can push on any of the corners and it moves in than there's an issue.
Also look for a thick layer of dust that might be blocking the air flow.
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At power on / power up, look for the key during the bootup (black screen with white text), that allows you to enter SETUP. If none designated such as F1, F2 F10 etc, then quickly click the delete button a few times and that may get you into setup. You may have to turn off the computer if you miss that window of time if it rfequires pressing the delete button a few times. Keep an eye out for the Enter Setup key though. To turn off the computer press and hold the power button 'till is shuts down and resart the process until you get to the setup screen in bios. In setup bios environment, look for set factory defaults and then save and restart. That may solve the issue of the lockup.
1) Switch on laptop 2) It will say something like press X to enter setup where X=F2, del or esc 3) This will present you with a blue and white screen called the Bios screen, leave it on that screen fro about a hour, then try moving the cursor keys to see if the bar moves around. If the bar doesnt move this indicates your laptop is overheating and you will need to book into a reputable PC shop for repair
Have you tried entering the 'Safe Mode?'
By tapping either F5 or F8 right after power on, you will interrupt the normal (currently ABnormal) Windows boot path and see a menu that will let you enter a mode with a terrible scattered Desktop but only very few Windows functions installed.
One of the latter is probably bollixed.
If it worked OK in the last days, you may be able to use the saved (good) condition by reverting to it via the Restore routine.
You can start this by clicking on Start, then Run, then entering in the provided window:
then click on OK.
Just follow the simple directions.
This will not affect your recent (or past) work, it only restores settings and freshens files to a condition of an earlier point in time when things were good.
This won't always fix your problem if you have been invaded by some spiffy malware but it is a good place to start.
Let us know if this helped-
Boot the system with your Windows XP installation disk. When the boot options window appears select R for recovery console. Once you have logged into the DOS session type: fixmbr and hit the enter or return key and select "y" for yes you want to do this. Type: fixboot and hit the return key again, hit "y" for yes.