F5F Stay Refreshed Hardware Desktop Issue with hidden device after power failure Problem arises following a power outage

Issue with hidden device after power failure Problem arises following a power outage

Issue with hidden device after power failure Problem arises following a power outage

K
Komodo88
Senior Member
749
12-27-2021, 03:03 AM
#1
Yesterday I used my computer normally until something unusual occurred. Initially, I had a Windows 11 Pro PC with Ryzen 5 3400G processor, an APU, no external GPU, Asrock A320M 4.0 motherboard, two 2600MHz 8GB RAM sticks, and a 650W power supply. I was playing Outer Wilds at medium settings when the machine stopped working. It sounded like a hard reset—pressing the power button and holding it for five seconds to shut it down. When I turned it back on, nothing appeared.

After troubleshooting, I connected the PC to an auxiliary power supply and plugged it directly into the wall. The computer started failing to boot; fans and lights flickered briefly before shutting off completely. I removed the RAM sticks, left them on the desk for a while, then plugged in only one stick to the motherboard—still no response. After replacing the other stick, it finally powered up. Windows started normally but without a keyboard or mouse.

I tried using a generic office keyboard and a basic gaming mouse. The mouse lights came on but no drivers were found. The keyboard was completely unresponsive. I turned off the PC, unplugged both devices, and tested USB 3.0 ports, but nothing worked. Windows booted fine, yet the mouse remained absent.

I accessed the Device Manager via Anydesk from my phone and saw no drivers listed—even though they existed in Windows. The Human Devices Interface Service was disabled, which was odd. I enabled it, but it didn’t help. No hardware was detected, even though Windows recognized them.

Checking the BIOS, I noticed the USB hub was dead. Plugging in an external hard drive resolved the issue. Using another USB mouse from my sister’s PC also worked. However, with a hybrid PS2 keyboard port, I still needed the USB to recognize my mouse. I managed to bypass the BIOS and found nothing related to the USB legacy mode.

I examined the BIOS battery, unplugged everything, removed the battery for half an hour, then reinserted it. The PC booted normally again. The BIOS reset helped, but the mouse or keyboard remained unresponsive.

At this stage, I suspect the power supply might not be delivering the right voltage. I cleaned all connectors and tried again, but nothing changed. I attempted to use a PS2 keyboard, which worked! But since my sister’s PC had a hybrid PS2 keyboard/mouse port, I still needed USB support.

I checked the CMOS reset jumper and shorted it—another reset, but no improvement. The issue persisted across multiple attempts.

I’m considering replacing the power supply tomorrow to rule out this possibility.
K
Komodo88
12-27-2021, 03:03 AM #1

Yesterday I used my computer normally until something unusual occurred. Initially, I had a Windows 11 Pro PC with Ryzen 5 3400G processor, an APU, no external GPU, Asrock A320M 4.0 motherboard, two 2600MHz 8GB RAM sticks, and a 650W power supply. I was playing Outer Wilds at medium settings when the machine stopped working. It sounded like a hard reset—pressing the power button and holding it for five seconds to shut it down. When I turned it back on, nothing appeared.

After troubleshooting, I connected the PC to an auxiliary power supply and plugged it directly into the wall. The computer started failing to boot; fans and lights flickered briefly before shutting off completely. I removed the RAM sticks, left them on the desk for a while, then plugged in only one stick to the motherboard—still no response. After replacing the other stick, it finally powered up. Windows started normally but without a keyboard or mouse.

I tried using a generic office keyboard and a basic gaming mouse. The mouse lights came on but no drivers were found. The keyboard was completely unresponsive. I turned off the PC, unplugged both devices, and tested USB 3.0 ports, but nothing worked. Windows booted fine, yet the mouse remained absent.

I accessed the Device Manager via Anydesk from my phone and saw no drivers listed—even though they existed in Windows. The Human Devices Interface Service was disabled, which was odd. I enabled it, but it didn’t help. No hardware was detected, even though Windows recognized them.

Checking the BIOS, I noticed the USB hub was dead. Plugging in an external hard drive resolved the issue. Using another USB mouse from my sister’s PC also worked. However, with a hybrid PS2 keyboard port, I still needed the USB to recognize my mouse. I managed to bypass the BIOS and found nothing related to the USB legacy mode.

I examined the BIOS battery, unplugged everything, removed the battery for half an hour, then reinserted it. The PC booted normally again. The BIOS reset helped, but the mouse or keyboard remained unresponsive.

At this stage, I suspect the power supply might not be delivering the right voltage. I cleaned all connectors and tried again, but nothing changed. I attempted to use a PS2 keyboard, which worked! But since my sister’s PC had a hybrid PS2 keyboard/mouse port, I still needed USB support.

I checked the CMOS reset jumper and shorted it—another reset, but no improvement. The issue persisted across multiple attempts.

I’m considering replacing the power supply tomorrow to rule out this possibility.