Black screen,white cursor.

Earlier today, all machines were running fine until somebody hit a power pole down the road.
When power came back on, turned all machines back on.Or tried to, at any rate.
2 came up OK. The third goes immediately to a black screen with a flashing white cursor in the corner
Have already removed and reseated the RAM.Removed and reseated the power and data cables from the hard drive.Tried pressing every F button on keyboard.Cont-Alt-Delete doesn't work either.
No Windows splash screen.Just the black one.
What else to try?

 

Oh dear dont sound good, Are the fans working ?? and any lights on especially on front of case, any blinking or continuos light, any Beep codes. How long from pressing On button to Black screen ?? If you got a vid card installed try connecting to Onboard, Unhitch any external USB devices. Have you tried booting with another HD.

 

All fans work, power light comes on the front panel, noactivity light from hard drive.
Machine is Small Form Factor with no room for plug-in card.Onboard only.
No beeps at all. Just about 3-4 seconds to black screen.
Resetting CMOS had no effect.

 

Does the bios screeen show up?

 

No screen but the black one.

 

hhmm not an expert but sounds like your mobo is fried if the bios screen don't show. if nothing else worked on the pc you would still at least get that up.

 

I think you answered your own question here.... I'd say the power supply and/or the mobo is fried. Many people have the mistaken belief that "if the fans are spinng, the power supply is OK". This is not so. Since you have other PCs available, power one of 'em down, and borrow the power supply from it. Hook it up to the non-booting PC and see what happens. I would try it first with NO devices hooked up: no hard drive, no CD, no floppy, no modem, no sound card, etc. If it POSTs OK, then power down and unplug the power cord, and start plugging things in.
:-D

 

Must be either the hard drive or Windows itself.
Non-functioning machine is one of my "twins". Removed hard drive from the one that still works and installed it into the problem machine.Booted right up when power button was pressed.