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Plugging in front panel I/O (USB and Audio) Freezes Whole System

Last response: in Windows 7
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January 28, 2014 9:32:35 PM

So just built a system and having an issue where occasionally plugging in any devices in the usb or audio jack will lock up my computer and force my to do a hard reset. Tested in bios as well and it locks up. Thought at first it might be a grounding issue so I took out the mobo and test up a test bed on a cardboard box and the same thing happened. Next I thought it might be an issue with my case front panel i/o and I happen to have two of the same case so tried it with my other cases front panel headers and same thing happened. Any help or tips would be greatly appreciated. Specs are listed here: http://pcpartpicker.com/p/2BQXJ

Bios is up to date and I did a clean install of Windows 7 Home Premium 64 bit with all of the latest drivers installed.
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January 28, 2014 10:25:21 PM

Is this happening only on your front panel or do you have same in the back panel of your mobo?
You can try disabling Legacy USB storage / USB Storage Function on the BIOS settings, this could help you sometimes. You will find it under peripherals section
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January 29, 2014 6:46:10 AM

Rams Anirudh said:
Is this happening only on your front panel or do you have same in the back panel of your mobo?
You can try disabling Legacy USB storage / USB Storage Function on the BIOS settings, this could help you sometimes. You will find it under peripherals section


K I'll give that a shot as well and yes it is only with front panel audio and usb. All rear I/O work just fine.
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January 29, 2014 6:49:59 AM

Okay no problem, you can try this, this should help you 99%
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January 29, 2014 7:19:17 AM

Rams Anirudh said:
Okay no problem, you can try this, this should help you 99%


Appears to have helped but now can't get into bios without clearing cmos. I will have to try a few more times to confirm but will update when I get back from work.
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January 29, 2014 3:44:23 PM

Rams Anirudh said:
Okay no problem, you can try this, this should help you 99%


=( still getting freezing. It almost seems like a grounding problem. I don't want to rule out the case but I did try it with both of my cases which are identical so unless both of them have the same problem they shouldn't be the cause. Any other ideas. Thanks for the suggestions so far by the way!
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January 30, 2014 3:32:49 AM

The basic problem is grounding for this, but you were so confident in your OP that it was not :(  So I gave you other options
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January 30, 2014 8:25:51 AM

Rams Anirudh said:
The basic problem is grounding for this, but you were so confident in your OP that it was not :(  So I gave you other options


Haha no that was my mistake. I thought I had ruled out the case because both cases did the same thing. Another interesting thing I discovered was that even when the front panel audio cable was unplugged and I tried plugging in headphones the system would still lock up. Upon looking at the front panel i/o it appears that the audio and front panel headers (reset, power switch, hdd led, and pwr led) are on the same pcb. Think this is definitely a grounding issue?
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January 30, 2014 8:38:39 AM

Yes !!! You have grounding issue on your comp, I don think anyother problem could be causing this
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January 30, 2014 8:46:47 AM

Rams Anirudh said:
Yes !!! You have grounding issue on your comp, I don think anyother problem could be causing this


Sweet. Now we have something to work on. The part of the case that houses the i/o is made entirely out of plastic and there doesn't appear to be a ground wire going to a piece of metal on the case. I'd assume typically the grounds going from the front i/o headers to the mobo should ground everything fine but for whatever reason they aren't in my case. I should be fine grounding both sides of the i/o by just putting a piece of copper wire under a screw on the i/o pcb and attaching it to a screw on the metal part of the case?
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January 30, 2014 10:10:54 AM

That should be fine. Even if your case is made of wood or plastic grounding must be done to discharge static electricity. That is the basic idea of grounding
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January 30, 2014 11:02:25 AM

Rams Anirudh said:
That should be fine. Even if your case is made of wood or plastic grounding must be done to discharge static electricity. That is the basic idea of grounding

kk I'll do that and report back. Thanks for the help so far!
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January 30, 2014 11:19:26 AM

You're welcome. Happy to help
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February 1, 2014 1:48:39 PM

So grounding helped a lot and I am getting a lot LESS freezes. Key word less. It was still happening but a lot less frequently. I then unplugged the audio cable but left my ground and haven't had a freeze since. I'm just gonna have to live without front panel mic and headphone but I'm fine with that. Will update if the problem arises in the future!
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February 2, 2014 2:44:25 AM

Okay sure. Good Luck !!
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