Posted 24 March 2008 - 11:57 AM
I have Compaq desktop, a year or two old. The USB ports stopped working, though they showed up in Device Manager as being OK. I wound up installing a PCI USB card to have some working USB ports. Those worked for a while, but then they started behaving erratically.
Thinking the motherboard may be on its way out, I moved the hard drive from this PC to a similar one (same manufacturer and production number). Everything worked fine in this one, the USB ports were good. However, the keyboard did not work. But in an odd way.
If you boot up and want to go to safe mode, the F8 key works. You can also hit F1, the ENTER key responds, etc. Once you are in safe mode, the keyboard works - until you move the mouse. Once you move the mouse (a PS2 mouse), the mouse freezes and the keyboard (also PS2) stops working. A USB mouse will continue to work. But no keyboard will, not a PS2 and not a USB.
I ran PC Doctor's scans, hardware passes. I tried to do system restores, there are plenty of dates to choose from. But, no matter what date I select, it tries to do a restore, but then tells me that it cannot restore to that date. No matter what date.
So, what do I do? The keyboards work on other PCs. They seem to be OK.