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First - re-seat the hard disk and reboot the computer. If the computer does not boot up then reboot and go into the BIOS configuration to see if the BIOS detects the hard drive. If it doesn't detect the hard drive then it could be faulty. Then the hard drive needs to be replaced in the computer/laptop, Windows installed and the computer or laptop's device drivers plus your programs etc. to get a functioning computer/laptop again.
do you have your original windows software disk?
you can go to safe mode by pressing f8 during the boot sequence.. tap
f8 a few times from the second the computer starts to boot.
It is possible you have a virus or something that damaged the master boot record.
Here is a tutorial on recovering the MBR: To access this, I booted the system from a Windows XP CD, waited for files to be loaded into memory, then selected R for recovery console, selected my Windows XP installation and entered the administrator password. Once inside the Windows XP recovery console, I tried the fixboot command. This didn’t seem to make any difference on reboot, so I tried again with fixmbr. After another reboot, Windows XP was up and running (some Internet sites suggest fdisk /mbr but that’s not a recovery console command under Windows XP).
Normally it's because the resolution is set too high for the monitor. This has happened to me when I switch a computer from a flat screen to a old "biggy-size" monitor.
try rebooting the computer and BEFORE you see the windows splash screen, start pushing the F8 key...this should bring up a menu...select VGA Mode...it won't be pretty, but once you're in..right click on the desktop and change the solution (try 800x600). restart the machine...that should work.
This is the common bad capacitor problem. The caps have died inside, and they can be replaced. If you have basic electronics skills, you can go in, order replacement caps, and unsolder and resolder. If you can't do it yourself, you can take it into a shop.
Here is a link to the Cap plague that explains what happens in detail. But I repair these all the time with that symptom.
no computer is trash when you are dealing with a software issue.
boot up and tap on the f8 key... when you get to that screen... choose safe mode... if it successfully boots.... go to start menu... and restart again... it should boot... if it wants to do the update let it.... if still nothing.... f8 again and choose last known good configuration
I have a hp desktop, each time I push the sleep button, the computer goes to sleep, however about 10 seconds ofter entering sleep mode it starts up again.How can I make the computer stay in sleep mode. thanks
Found one of these in the dumpster at my shop today. Had the "stays on for 3 sec then turns off" issue. Problem is the bad batch of electrolytic caps of a few years ago. 2 on the power supply board were visibly swelled up (470u/16V and a 1000u/16V). Replaced them both - it's fixed. Cost 50 cents.
If your Usb port works, then the mobo is working, so possible graphics problem.
Try booting up in safe mode(normally pressing F8) on boot up then highlight 'start windows in safe mode', to see if Windows will load with only minimal drivers, if so restart again, pressing F8 again, but this time highlight 'start windows with last known good configuration'
Doing any of these 2 things can be done in any order, either last known good config first or safe mode.