My six-month-old long-haired cat gets excited and runs around my desk while I'm gaming. Whenever he starts having zoomies near the computer, the system crashes, but the exact symptoms vary. The monitors remain on with a frozen image, sound stops, and the fans, keyboard, and mouse all shut off. It never happens when he's home alone, even after the computer has been running unattended for two days. The power and reset buttons are difficult for him to reach, and I've checked the cables and connections. Shaking the desk and simulating the movement caused by his playing does not reproduce the crash. I live in a dry climate, so I'm wondering whether static electricity from his fur could be discharging into the computer. I was able to rub him against the front USB ports and repeatedly make the computer play the sound of a USB device being connected, even though nothing was plugged in. Rubbing my hand there did not produce the same result, although this test did not crash the system. What could be causing this, and how can I protect the computer?
2 Answers
The USB-connect sound suggests the static is being detected as a brief electrical event, but it does not prove that it is the only cause. Check the USB ports for bent contacts, debris, or a loose front-panel connector, and consider temporarily disconnecting the case’s front USB header to see whether the crashes stop. Also check system logs after a crash and test with a different power outlet or properly grounded surge protector. If the fans and input devices all stop together, the power supply, motherboard, or a protection shutdown may be involved rather than just the keyboard being pressed.
Static electricity is a plausible explanation, especially with a long-haired cat and dry air. A discharge near the USB ports could briefly disturb the USB controller or motherboard, while a stronger discharge might cause a system freeze or power-management failure. It may also be worth checking whether the computer, power supply, and desk setup are properly grounded. Try increasing humidity, using an anti-static mat, and keeping the cat away from the computer while troubleshooting. Avoid deliberately repeating the discharge test, since static can damage components even when it does not immediately crash the system.
I’ve ruled out ordinary desk movement pretty thoroughly, and the USB connection sound happening specifically when his fur touches the ports makes static seem much more likely. I’m going to stop testing it directly and focus on humidity and grounding.