Member
I thought I'd document this weird bug in case anyone else comes across it.
I help look after a small FHC with 4 Dell Optiplex 9030 AIO (all in one) computers. They were scheduled to be remotely upgraded to Windows 10, but that process failed. I then moved on to manually installing the FHC Windows 10 image via flash drives. That worked fine for 3 of the 4 computers. However, one computer kept powering off about 30 seconds into the Windows splash screen. This was a sudden loss of power, not a controlled shutdown. You'd hear a pop from the speakers and the computer would be off. I tried multiple ports, multiple flash drives, updating the BIOS, trying all kinds of BIOS settings...all failed. I also tried a third-party Windows PE live boot disc, and while it failed in the same way when loaded from a flash drive, it booted just fine when loaded from a CD. (The 9030 still has a CD/DVD player.) Thus, the problem is specific to loading from the USB ports.
The solution turned out to be to remove the speaker cable from its connector on the motherboard. Towards the bottom of the motherboard is a connector marked "SPKR." Disconnecting the cable from that connector solved the problem. Crazy, huh? The speakers seemed to be working, but leaving them connected sabotaged the USB boot process. Maybe there is a short somewhere in the speaker system. Anyway, we can live without sound from the speakers. If we really want sound, we can always plug a set of powered speakers into the external speaker jack in the back.
I thought I'd post this to try to save other people the many, many hours I spent troubleshooting this thing.
Merry Christmas!
I help look after a small FHC with 4 Dell Optiplex 9030 AIO (all in one) computers. They were scheduled to be remotely upgraded to Windows 10, but that process failed. I then moved on to manually installing the FHC Windows 10 image via flash drives. That worked fine for 3 of the 4 computers. However, one computer kept powering off about 30 seconds into the Windows splash screen. This was a sudden loss of power, not a controlled shutdown. You'd hear a pop from the speakers and the computer would be off. I tried multiple ports, multiple flash drives, updating the BIOS, trying all kinds of BIOS settings...all failed. I also tried a third-party Windows PE live boot disc, and while it failed in the same way when loaded from a flash drive, it booted just fine when loaded from a CD. (The 9030 still has a CD/DVD player.) Thus, the problem is specific to loading from the USB ports.
The solution turned out to be to remove the speaker cable from its connector on the motherboard. Towards the bottom of the motherboard is a connector marked "SPKR." Disconnecting the cable from that connector solved the problem. Crazy, huh? The speakers seemed to be working, but leaving them connected sabotaged the USB boot process. Maybe there is a short somewhere in the speaker system. Anyway, we can live without sound from the speakers. If we really want sound, we can always plug a set of powered speakers into the external speaker jack in the back.
I thought I'd post this to try to save other people the many, many hours I spent troubleshooting this thing.
Merry Christmas!