So we have a Pentium Core 2 6600 machine with a off-the-shelf Intel MB (forget the model, but can find out) that has been running non-stop since it was initially plugged in some 5 years ago.
First, one of the original WD 250g hard drives failed in a Raid1 setup, the second drive was readable, but not bootable. We replaced them with two 2tb drives pilaged out of some new WD Essentials back-up drives. Got Windows XP Pro 32-bit reinstalled, updated, and running.
After a short period of time the mouse and keyboard would intermittantly and independantly stop working.
- checking Mouse current draw: 100mA
- checking bandwidth draw on USB controllers, max was 23% on any one controller
- checked other devices current draw, none were anywhere near the 500mA limit
- made sure to update all drivers and bios (bios even suggested potential problems with USB devices that it was supposed to resolve)
- tried other wired mice, same result
- reduced Hardware Acceleration 1-click to the left
- disabled the Power option for the OS to shut off USB devices while idle
As of recent we have plugged into the USB:
- Epson 4800 Pro printer
- WD Elements 1gb back-up hard drive (gets backed up every night)
- AOpen keyboard
- AOpen optical wired mouse
- APC UPS back-up
- often have a flash drive plugged in
So, the mouse either stops working, keyboard stops working (numlock light goes out, so is loosing power), or the mouse pointer skips across the screen.
Any other tips to try before I start spec'ing out a new motherboard?