Question PC turns on but doesn't give off HDMI signal to monitor and doesn't connect to keyboard and mouse either

Dec 2, 2022
My PC has recently stopped sending am HDMI signal and doesn't turn on my keyboard or mouse. Everything seems to be running fine in the computer just from a quick scan inside and still runs but it doesn't give off a signal or turn on anything. I suspect that the motherboard would be the culprit as both the graphics card isn't giving a signal and all usb ports are not working but I still want to hear another opinion. I have tried removing the battery from the motherboard and replacing it with a new one which worked for about a day before it went back to doing this. The GPU fans are still spinning and everything still seems to be working just no signals whatsoever.