Turnin on my computer problem!

[juan9087]

I have a big problem i turn off my computer but when i go to turn it on its turns on but the screen keeps black until i turn it of and on like 1000 times then randomly screen turn on and the problem is not my monitor cause if i connect it to my other computer it works well and i do not hear no beeps when i turn on the computer just the screen stays black.

please help me.. this time my computer turned on thats why i can whrite this here.
Thank You.