Just when I thought that everything was good, it turned bad. System won't post & hangs on BIOS Sign On.
I've already checked D-Bracket Troubleshooting
& followed all the links.
Here's the full story.
System (as shown in sig below) ran fine for 2+ days, with Windows installed. I was even able to connect it to my G4 Mac via (Marvell) Gigabit Ethernet. Shared files, no problems. Everything was running smooth.
I hooked up the keyboard, mouse & monitor via a Dr. Bott 4-port MoniSwitch USB KVM switch, to share them with the Mac, & this appears to be when things turned bad. The KVM switch has worked perfectly with my Macs for years. Since my new PC keyboard doesn't have a USB port built-in, like my Mac keyboards, I had to hook the PC keyboard & mouse into a powered USB hub, then hook the USB hub into the KVM switch. The hub needed to be powered because the trackball mouse is optical. Here's a simple diagram:
PC ----| |----Monitor
|-----KVM Switch-----| |----Keyboard
Mac ---| |----USB hub----|----Mouse
This is when things started getting flaky. Windows, & perhaps the BIOS, disconnects the USB device when it is unplugged, & in this case when the KVM switches it from the PC to the Mac. Windows would then reconnect the USB device when the KVM switched back to the PC. Windows dutifully announced each connect & disconnect with it sound alerts. I verified that this is indeed what was happening, by checking the meaning of the specific alert sounds, & I could see Windows on-screen notice "new hardware found, driver loaded, etc.) on the USB device icon in the tray.
A couple of times when I switched back to the PC the USB keyboard didn't reconnect in Windows. Fortunately, the mouse did reconnect & I was able to reboot. Everything was OK upon reboot. The last time I switched back neither the mouse or the keyboard reconnected in Windows, & I was stuck. Grudgingly, I hit the reset button on the front of the PC to reboot. Upon reboot the system wouldn't post.
I tried plugging the keyboard into the USB ports on the back of the PC. No post. I used the PS2 adapter on the keyboard. No post. I reset the CMOS by pushing the reset button on the motherboard (power supply was disconnected from the mains). No post. I disconnected all drives, USB, Firewire & audio connectors from their headers on the motherboard, creating a barebones system. No post. I removed a stick of RAM. No post.
I've removed the CMOS battery & will leave it out for a few hours to see if that resets the BIOS. If that doesn't work I'll call MSI in the morning.
Is it possible that I fried the USB ports somehow?