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Why the computer is on but the screen is completely black

Why the computer is on but the screen is completely black

I upgrade my Windows Vista to Windows 7 Home Premium, before that, I run Windows 7 Upgrade Adviser, it said I can run Windows 7 Home Premium and Windows 7 Ultimate. After upgrading, the computer work fine, I made a system restore just in case. After turning off the computer, next day I turned it on and the screen is completely off, the fan is on, the computer is on but the screen is blank, everything is plugged in but, pls help me

Asked by: Guest | Views: 274
Total answers/comments: 3
Guest [Entry]

If you cannot see the monitors menu then i say the monitors screen might be dead (or the back light). i bet if you try another monitor you'll get a picture.
Guest [Entry]

"Normally a monitor have an indicator light. Is that one on or off? If no light it shows that

1 there is or no power supplied via main cable

2 Main cable defective, try an other one

3 Main switch? Some monitors have on the backsite a main switch and on the front a small on/off switch.

4 all ok above well your build in powersupply ias out of order. The display is not working anymore, so you can at least try to find a little fault, example a fuse on the power supply board or so. Check by metering if supply voltage is available on psu and output voltages on psu etc.

BE CAREFULL FOR LIVE HIGH VOLTAGES FROM MAINS SUPPLY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
Guest [Entry]

Also it very well could be something as easy as the resolution. First try to boot a bootable cd/dvd/flash drive and see what happens, if it boots and the screen works, reboot and attempt to start in safe mode. As soon as the computer comes on start tapping the F8 key (7 or 8 times) and see if it gives you a screen with selection on how to start. Cursor up (or down) to the start in safe mode (without networking) and hit enter. When computer boots go to display settings and select 1024x768, apply and reboot.