PC got incorrect voltage via USB, motherboard failed but could be fixed.
PC got incorrect voltage via USB, motherboard failed but could be fixed.
Hey everyone, I messed up and ended up damaging my PC. Basically, I connected 12-24V via USB because of a wiring mistake during a project. The machine shut off right away and doesn’t power back on. I haven’t checked other components yet, but it looks like the motherboard is probably gone. Only one RGB LED on the case lights up briefly when power comes back. When tested with my old power supply, nothing worked.
If I take it to a repair shop or Asus, I’m hoping they can fix it. Since this board is now £70 more than last year’s price, I’m willing to pay a bit if it needs fixing. Just a note—it’s an ASUS ROG Strix Z390-E model.
Sure, I can help with that. Just let me know what you're referring to, and I'll explain clearly.
I added the laser module to my CNC router and didn’t notice the connector from the mainboard to the laser daughterboard was PWM. I connected it to a power supply, sent a signal, and suddenly things worked. That mistake happened because I was exhausted—never should have started projects at 4 in the morning. I should have considered the cost of a new board. I paid £220 for a replacement, but checking Amazon showed they’re around £280–£299. The product is under warranty, though it’s clear the issue stemmed from my own error. I didn’t seem very honest about it.
It wouldn't significantly alter the situation. They'd need to examine, verify, and swap nearly every part on the motherboard, then thoroughly test everything—this involves a lot of repetitive work and isn't inexpensive. I'm unlikely to save much by opting for a completely new motherboard.
It seems like you're considering a possibility but haven't been able to verify it yet. It looks like you're facing some challenges and might be making assumptions based on limited information. Keep pushing forward, but be careful not to jump to conclusions.
Process the CPU, then verify the remaining components. Discard the board entirely if necessary.