Your motherboard isn't powering up.
Your motherboard isn't powering up.
The motherboard isn’t powering on and there’s no indication of life from the PSU. The CMOS battery was changed, but the PC remained functional until I left it unplugged for a month. After reassembly, it still wouldn’t boot. When I removed the board and tried to start it alone, nothing happened.
Hello, Are you connecting the frontpanel pins to power it on? Make sure you're using the right ones. If the issue continues: attempt to reinstall the CPU. Also, see if your power supply functions with another machine.
You checked the PSU by replacing the CPU, meaning you took it out and put it back in.