My computer turns on but nothing appears on the screen?

my computer screen went completely black, even though it turns on it stays black. and i am wondering if it has something to do with the white tape like thing that is inside of the computer on top of where the hard drive would go

i was using my computer one time and my screen turned completely black, so i checked all cords in the back of my computer to see if any were loose but they were ok, then i turned off my computer by holding the power button and tried to turn it back on...

when i turn on my computer it starts up normal the speakers make the beep sound but then nothing shows up when the moniter turns on, i find the red light that usually blinks doesnt now only the green light comes on. the moniter turns on and you can see...

Lately my computer broke down, when i was loading up a game all of a sudden it turned off, i tried turning it back on but it wouldn't go on. It was confirmed that the power supply wasn't working. Until then we took it back to the shop we brought it from...

I built my self a computer and well everything was working perfectly fine but just recently i decided i was going to clean my computer up and do some more cable management because it really did look messy before. Once i was all done i went to plug the...

At first my computer would not turn on.. I took it to a friend who replaced the power supply and it worked for a short while before it started with new problems. Now i can't get it to turn off.. It turns on automatically when plugged in and nothing will...

Today i turned my computer on but i could not see any display in my screen not even my bios screen but i could hear that my cpu and heat sink fan are running I removed the bios battery and inserted it again also but nothing happened it remains the same...