Computer powers on but display shows nothing.

July 28, 2011 at 11:17:23
Specs: Windows 7
My computer powers on but the mouse, keyboard, and display doesn't work. what could be the problem??

See More: Computer powers on but display shows nothing.

Report •


#1
July 28, 2011 at 11:59:21
could be a number of things here.
try a different video card or monitor for starters, then look at replacing ram. if none of them fix the problem, it most likely to do with your motherboard/processor or hard drive

Windows 7 x64
Intel® Core™2 Duo CPU E8500 @ 4.1GHz
ATI Radeon HD4870

8GB OCZ Platinum 1066
2x Samsung 1TB Spinpoint F1


Report •

#2
July 28, 2011 at 12:00:41
If you turn on your computer and you get fans, power lights, etc, but no video & no boot-up (All the lights on, but no one is home) it's most often it is a dead motherboard.

Any beeps?

Normally your computer will produce a beep code (certain number of beeps) depending on the issue & without a PC Speaker you wouldn't hear anything. Often these days I see computers without a PC Speaker installed.

If that's your case then your problem COULD be a dead RAM stick, Video card or CPU.

For troubleshooting:

1) I first would remove any device that is not necessary to get it to power-up:
- any external devices (except your monitor)
If you can boot after doing this: You had a bad device connected, or, the power supply is defective and not producing the correct amps/voltages under full load.

If you're not comfortable working inside your computer, take her to a professional, she's really sick.

If you have some experience working inside computers and feel comfortable doing so, here is some more suggestions:

1) Remove more non-essential devices:
- any PCI/AGP expansion cards (except Video if your motherboard does not have on-board video)
- disconnect power & data cables from any drives (hard drives & CD/DVD drives)

2) Try removing all but 1 memory stick.
- try a different stick of memory
- try a different stick in another slot
This may identify a problem with the RAM or RAM slots.

3) You could try a 'known-good' power-supply.

Buying a new Motherboard most often involves replacing your CPU & RAM so that they meet the specs for the new board. Unless, of course you could find a older/used board that matches your current CPU & RAM specs.
*cough*eBay*cough*


Report •

#3
July 28, 2011 at 12:03:30
Good pointers!

But you would still see the BIOS POST screen if the hard drive was dead.


Report •

Related Solutions

#4
July 28, 2011 at 12:42:41
yes, you would still see the bios screen if the hard drive was a goner, as this is part of the motherboards setup. and if you see the bios screen, then it more than likely means your video card is working, and obviously your monitor.

Windows 7 x64
Intel® Core™2 Duo CPU E8500 @ 4.1GHz
ATI Radeon HD4870

8GB OCZ Platinum 1066
2x Samsung 1TB Spinpoint F1


Report •

#5
July 28, 2011 at 13:12:06
First, check the display cable. Is it tight on both ends?

Ask and Answer. The way of learning.

Dell Dimension 8300
Intel Pentium 4 HT @ 3.20 GHz
4 GB RAM
Nvidia Geforce FX5200


Report •

Ask Question