Solved Rear USB ports suddenly stop working

November 6, 2015 at 22:02:38
Specs: 7, Dual Core/8 gigs DDR3
So, the other day I came home to my mouse and keyboard (Microsoft wireless combo) not responding. Thinking that my computer froze, I was about to restart it. First I checked the batteries. Replaced them with brand new batteries. That wasn't the problem. Then I saw the back ground change, and the task manager was still running.

I did some checking and the front USB ports work fine. I restarted the computer, and the rears worked fine after the restart. Then they stopped again. I did some research and a lot of forums were saying to uncheck the "Allow this device to turn off to save power" which at that point I did.

The USB ports have been working fine for days and then all of a sudden, I heard the disconnect sound twice. I tried the keyboard and mouse and they didn't respond. I hooked them up to the front ports and they are working fine (I'm able to write this). I've tried to refresh the ports, I checked to see if there are any updated drivers. I have the most recent drivers.

Anything connected to the rear ports won't work. No power to any of them, and if I plug in a flash drive or something, nothing happens. I'm sure when I restart the computer, they'll work again. I don't know for how long though.
The funny thing is that I have nothing plugged directly into the rear ports except the mouse and keyboard. There is a passive hub (which I use for flash drives), with nothing connected at the time, a cable for my Zune dock, which was not docked at time, and another cable that isn't connected to anything. I use that one for powered external hard drives.

This computer has been running pretty well. This problem was all of a sudden.

Oh, and nothing new installed lately.


I'm at a loss.

Old stuff that still works, somewhat....


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✔ Best Answer
November 8, 2015 at 02:15:36
Just throwing this out there.

Could this be due to a failing PSU?

In any case my process would be to replace the power supply with another spare one or one from a lazy PC.

A lot of the guys here can guide you on safely checking the voltages on a PSU, but of course you will need the testing equipment to do this.



#1
November 7, 2015 at 07:37:31
Ty using a mains-powered USB hub.

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#2
November 7, 2015 at 08:58:26
The ports themselves are not working. Not only are they not sending power, they just aren't working.

And this morning, the keyboard and mouse weren't working again, and they were connected to the front USB. So I guess that all USB ports stop working for some reason.

I had to restart my computer to get them working again. That's how I'm typing this. And the keyboard and mouse are again on the rear USB. Everything's working fine, for now.

Why would all of a sudden the USB ports stop working? And it's all rears at the same time, then I guess the fronts at the same time.

There are 4 in the rear and 2 in the front.

BTW, MSI mobo, G41 chipset, 775 CPU

Old stuff that still works, somewhat....


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#3
November 7, 2015 at 10:28:50
Worth a try:

Start > Control Panel > System

Click "Hardware" Tab > Device Manager button

USB Root Hub (all that exist)> Right Click > Properties > Power Management Tab

Un-check "Allow the computer to turn off this device to save power"

"Channeling the spirit of jboy..."


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#4
November 7, 2015 at 11:47:35
T-R-A:

That's what I was talking about when I said:

"I did some research and a lot of forums were saying to uncheck the "Allow this device to turn off to save power" which at that point I did."


I just couldn't remember the exact wordage. I understand the point of unchecking it, but it's been checked this whole time. And I've had this system in it's current form up and running for years now. And this problem just started.

So far today the keyboard and mouse have been fine on the rear ports.

Old stuff that still works, somewhat....


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#5
November 8, 2015 at 02:15:36
✔ Best Answer
Just throwing this out there.

Could this be due to a failing PSU?

In any case my process would be to replace the power supply with another spare one or one from a lazy PC.

A lot of the guys here can guide you on safely checking the voltages on a PSU, but of course you will need the testing equipment to do this.


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#6
November 8, 2015 at 10:48:53
btk1w1,

I'll look into that.
This PC only has 3 HDDs a DVD drive and a VERY low end video card. A fan on the CPU and one for the case. It's got a memory card reader too. But that's it. There isn't a lot of wattage draw, but I'll still check it out.

I did however, when messing around in the BIOS to see if there was any settings there, did see that the voltages were good, but then again, that's without the OS running. Just in the BIOS menu.

I did in the past, (maybe about a year ago) buy a Corsair 430w PS for $20. I tried to use it in this PC, but it didn't work for some reason. It works in all my other PCs, so I used it for another build, but I'm not sure why it wouldn't work in this one.

Old stuff that still works, somewhat....


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