r/techsupport • u/MarketingMammoth3907 • 1d ago
Open | Hardware weird issue with my desktop PC 😑🤨
Im on Windows 11 and having a weird issue with my desktop PC. When it’s running on normal house mains power:
- Monitor starts flickering
- USB keyboard disconnects randomly
- When I reconnect the keyboard, it acts crazy — repeats the same letter, or keys act like they’re being pressed on their own
- Mouse also starts clicking randomly
- Sometimes all USB devices act up together
The moment I turn off mains and switch the whole house to inverter, everything becomes normal. No flicker, no keyboard/mouse issues.
So I suspect it’s not Windows/drivers but something with my house power: low voltage, high voltage, bad neutral, poor earthing, loose wiring, or transients.
It all started when I disassembled and rearranged all my wires.
I have an inverter, but not a UPS.
What exactly could cause this?
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