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Problem with PC, unable to detect keyboard via ps2 and when loading Windows gives black screen - URGENT

Hi,

I replaced my cpu cooler with a better one, now when i plug everything
back, my ps2 keyboard does not get detected by my PC, there is no error.
the PC boots up fine, no alarm sounds or anything. BUT the keyboard doesnt
have light. The keyboard is new and i tried 2 other ps2 keyboards, same problem.

I'm afraid to flash my mobo because last time i did it, i lost all my partitions
configuration. My PC specs is P4 3.0GHZ, Abit ISE7 mobo, 2GB dual channel
corsair ram, 2 x 200gb sata, 1x 80gb ide hdd, ATI 9800XT gfx, creative sound
card and a network card on a HEC400W psu.

The PC is a year old and is working fine everything until i replace the new
fan, the new fan is working well just that the keyboard doesnt get
detected..

I can't go into windows - after it boots, when its suppose to load windows,
a black screen appears.. - not my usual stylexp bootscreen loader.

Anyone can help, much appreciated!

Thanks!
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jedistar
Asked:
jedistar
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4 Solutions
 
CallandorCommented:
Try resetting the BIOS with the motherboard jumper.  Check for loose connections that may have occurred while working on the inside of the machine.
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jedistarAuthor Commented:
Will i lose all my partition info?
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CallandorCommented:
No, the BIOS only stores disk geometry, not partition info and you can force it to autodetect it (or it will do it for you).
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jedistarAuthor Commented:
ok i did a flash, cmos default loaded.
still same
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jedistarAuthor Commented:
i searched on the net, someone had a similiar problem to me
http://www.computing.net/hardware/wwwboard/forum/31540.html
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jedistarAuthor Commented:
but he didnt solve it
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jedistarAuthor Commented:
anyone?
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Aneesh RetnakaranDatabase AdministratorCommented:
Did you try a second keyboard ?
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jedistarAuthor Commented:
yeap 2nd PS2 and 3rd one didnt work.
I dont have a usb keyboard
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PCBONEZCommented:
I suggest that you temporarily put the old cooler back in and see if the problem goes away.
Depending on how it's laid out you don't have to switch the whole cooler, just the fan will do.
I'm trying to determine if you have a shorted fan.

Also check the info on your motherboard and fan to verify they are both for the same voltage.
If you have a fan plugged into the wrong voltage it will usually still spin but not at the rated speed.
You can also do this by reading the voltage on the old fan and the new fan to compare.
The old fan was obviously the correct voltage for your motherboard.

Fans are either 5 volts or 12 volts. . The PS/2 port is 5 volts.
If you plugged a 12 volt fan into a 5 volt power source you may be killing the PS/2 port by sending all the 'juice' through the fan.
.
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jedistarAuthor Commented:
done that, think ps2 is dead.
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rindiCommented:
If you plugged the keyboard while the PC was running, this will likely have overloaded the PS2 port. PS2 Ports aren't hotpluggable and you should be very carefull with them.
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jedistarAuthor Commented:
what abt my usb keyboard, i have it plugged it, it has light at the interval of 10 secs but i cant type anything..
f1 or del doesnt work
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rindiCommented:
Most BIOS's can be set to "legacy mode" or something similar so that USB keyboards can be used. Of course you first have to be able tochange that setting with a working keyboard....

Possibly if you reset the CMOS values of the board to factory defaults (check the manual on how to do that, possibly you need to temporarily change a jumper setting) this might be set.
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jedistarAuthor Commented:
i did reset cmos, before i posted, same error
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rindiCommented:
Then you will probably have to look at a new mainboard.
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MachsmanCommented:
This may or may not be helpful,
 About 6 months ago i got hold of a new USB Wireless Keyboard and Optical Mouse. They wouldnt work with my pc at the time, i had to boot the system while they were unpluggged and wait for the windows loading screen to come up then plug it in. For some reason they wouldnt not work at all unless i had them unplugged while windows started up.
Shortly after my mobo died anyway thankfully lol. Since then its been fine no problems at all. I did know at the time the old mobo was causing the problem i just wanted to get its life out of it haha.
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PCBONEZCommented:
It sounds like you killed the 5 volt power when you installed that fan.
It powers both the USB and PS/2 ports.
Did you leave it plugged in while you were working on it?

If the fan itself isn't bad then you probably fried something on the mainboard.
.
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