Computer Shuts Down When USB device inserted in rear USB ports

jjb8675309 · Oct 5, 2015

Hello All,

I'm having an issue with my signature rig where the computer will completely shut down when I insert anything (mouse, kboard, usb drive) into any of the rear usb ports. After it shuts down I have to reset the bios to get it to boot. The front-side usb ports work without issue. So far I have unplugged and re-plugged most major things, this didn't help the situation. Am I dealing with a faulty usb controller? (it worked without issue until a few days ago). Suggestions before I pull the trigger on a new 1155 mobo?

I have a GA-Z77X-UD5H-WB mobo with a 3570k/Antec 900w HCG PSU.

theyeti87 · Oct 5, 2015

I would ensure that you have all the correct drivers for the motherboard from the manufacture's website.

jjb8675309 · Oct 5, 2015

theyeti87 :

AFAIK they are but I will double check when I get home. the rig won't even get to a post screen the usb port is touched with anything once the computer is powered on.

boosted1g · Oct 5, 2015

There is no usb 2.0 drivers to install.

If ANY device plugged into the rear usb ports causes it to power off then you have a bad motherboard.

It MIGHT only be isolated to the rear usb ports, but there might be other shorts/issues on the board, or might have more develop in the future.
Do you have the board properly installed on standoffs with all of the screwed in?

jjb8675309 · Oct 5, 2015

Yeah I am using standoffs + it's well screwed in. No other ports exhibit the same behavior (shutdown and need to clear cmos). I was thinking its a bad board but wanted to get a few more opinions before buying a replacement.

"If ANY device plugged into the rear usb ports causes it to power off then you have a bad motherboard."

yes ^^ this is exactly what is happening.

RussK1 · Oct 6, 2015

That's weird Josh. There are 8 ports controlled by Z77 and 8 controlled by VIA hub(s) (front/rear x2 controllers). Always thought modern USB ports had separate fuses per pair... I can see "pairs" not working but the entire rear panel USB? NO.

I'd check the PSU and for good sake, re-flash the bios.

http://download.gigabyte.us/FileList/Manual/mb_manual_g...

jjb8675309 · Oct 6, 2015

Thanks Russ. I'll have to do more work on it and report back.

heaven_ · Oct 24, 2015

did it work ? I am facing similar issues.
I switched my jobs and traveled 3 hours in flight and have been facing the same issue after reassembling it.

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