[SOLVED] Pc turns on but mouse, keyboard, and monitors don’t work

[jacobdude09]

Last night i went to bed after playing some games on my computer, I turned the monitor off went to sleep, when I woke up I turned my monitors back on and the one connected to my vga cable was glitching out. Additionally the mouse and keyboard weren’t responding, it was almost as if my computer was frozen the monitor that is connected via hdmi seemed fine but I couldn’t do anything since the mouse and keyboard weren’t working. I tried shutting off the computer via the power button, but it wouldn’t shut down, in fear that something would break more if I left it on, I flipped the switch on the power supply, cutting off the power and shutting the computer down. I tried turning it back on and it started freaking out turning on and off rapidly every five seconds or so, so I cut the power off again and now when I turn the computer on the mouse, keyboard, and monitors don’t respond when I turn the pc on. Everything inside seems to be working fine, the motherboard lights up when I turn the power on, my gpu also lights up and the fans on it run when I turn the computer on, but my mouse and keyboard’s LEDs don’t light up, and the monitors even say that they aren’t recieving a signal through the input. Please help I really don’t want to have to get a new computer, I built this one myself two years ago and it was way too expensive to replace.

 

[Fros78]

This is one weird issue, could be PSU related though try checking that if you have a spare one

 

[stdragon]

Agree. Seems symptomatic to a failing PSU to me as well.

 

[Fros78]

Agree. Seems symptomatic to a failing PSU to me as well.

Im suggesting the HDD's since ive seen a PC that turns on for a split second and shuts off. Turned out to be a SATA Cable that killed the HDD and itself with it.

 

[stdragon]

I've seen cheap PSUs kamikaze all sorts of hardware including the MB, CPU, and RAM. Major brand units have protective circuitry as part of their design, so it's not much of an issue was it once was.

As for PSUs themselves - they're the most vexing to troubleshoot because they don't completely fail. Quite the opposite, they mainly suffer partial failure where any one of the many voltage rails goes out. This leads to all sorts of malfunctions in a PC from no POST to partial power.

 

[Fros78]

I've seen cheap PSUs kamikaze all sorts of hardware including the MB, CPU, and RAM. Major brand units have protective circuitry as part of their design, so it's not much of an issue was it once was.

As for PSUs themselves - they're the most vexing to troubleshoot because they don't completely fail. Quite the opposite, they mainly suffer partial failure where any one of the many voltage rails goes out. This leads to all sorts of malfunctions in a PC from no POST to partial power.

I Always keep a spare PSU in my house since that is the easiest thing to check, even if its like 450W or something like that it will be enough for a post

 

[stdragon]

It might not be a bad idea to have one of these.

https://www.thermaltake.com/Power_Supply/Accessories_/Power_Tester/C_00001777/Dr_Power_II/design.htm

 

[Fros78]

It might not be a bad idea to have one of these.

Didn't]https://www.thermaltake.com/Power_Supply/Accessories_/Power_Tester/C_00001777/Dr_Power_II/design.htm

Didn't even have an idea these existed for plugging every cable in them, im definitely ordering one of these