PSU-Motherboard ISSUE 'USB Ports are not Powered'

[elfy]

Assalam o alaikum.

Around 3 days ago, I was using my pc, i unplugged my Mouse & Keyboard from the usb port. When i plugged them again. They didn't worked. I restarted the pc, Reinstalled windows & did everything I could but they won't just work.

Then i got this error 'USB Ports are not getting enough Power'

So i went to Device Manager - USB Ports - Properties & it was true. The USB Ports require around 500mAH something, but the current was 0mAH.

Things I did:
- Reinstalled windows
- Plugged & Unplugged system wires - cleaned them

Now has anyone else experienced this? What's the issue? I've been using the Same power supply for the past 2 years and I didn't had any low power issue :/ and the motherboard looks fine too.

PSU - Branded 420 watts (i don't have any 3D card or anything, no gaming. just a normal pc)
Motherboard - ASRock Gen3 Pro3 something, I bought it around a year ago for 12-13K

Is there something I can do? What's the issue? the PSU or the Motherboard?

Solutions?

 

[ali tayyab]

Try the front usb ports, in the bios make sure legacy usb devices are enabled, i see tht u have a gne3 board, make sure u r using usb 2.0 ports ( just to try out). Finally try the front usb ports and see if they work

 

[elfy]

1. there are 2 front usb ports. One of them works for the Keyboard but not for anything else, usb-mouse or whatever!

2. Legacy usb devices are enabled.

3. I'm using usb 2.0 ports (but i have tried 3.0 too) I've checked each & every port & they don't work. (except the one front panel port which works just for keyboard.

 

[ali tayyab]

do any other devices work via the rear usb port, if you have any in hand try those. From looks of things, they have either shorted out (maybe you pulled them the wrong way) or maybe, just maybe the +5V line on your power unit is not providing enough current. If you have a volt meter at home you can try and check this from one of the usb connectors on the motherboard. Set your meter to measure DC voltage, something like 10V, and connect the red terminal on the +5V pin , the black to ground while the PC is on. See if it read +5V.

You should be careful while doing this and really i can't be blamed if things go south. If you don't want to try the onboard connector, you can do the same on the rear USB ports, its just a bit trickier.

IF they do read +5V, it probably implies your PSU not providing enough current. If they read nothing, it can either mean a bad psu or bad USB ports (shorted, fused!).

You can also try and measure current on the +5V line, but you would need a really sensitive measuring unit, capable of reading milliAmps.