Plugging in USB device causes display to go blank

Whenever I plug in any USB device, the monitor will go blank, but the case fans and lights will continue operating. The computer remains like this until I hold down the power button to turn it off and then restart it. It will restart fine. In addition to the monitor going blank, all power is turned off from USB devices (e.g. optical mouse light turns off).

This occurs probably about 25% of the time I plug a USB device in (sometimes nothing happens, as should be).

It does not mater which port I use. It's happened with rear ports, a hub wired to a rear port, front case ports (plugged into motherboard USB pins), or a PCI USB hub.

I've looked extensively for solutions and can't find any. I checked my motherboard multiple times for swollen capacitors and have not found any.

Today (and never before) when I plugged a mouse in, the same issue occurred, but the monitor turned back on about two seconds later, and a pop-up notified me of drivers successfully being installed. (I didn't notice whether USB power was cut) This makes me think that the computer is adjusting the display (as it does when a program requests administrative permission and the screen sometimes goes blank) but for some reason does not come back from it. There really is no indication that Windows stops. I never get a BSOD.

Operating System: Windows 7 64-bit, regularly updated
Display Adapter: Nvidia GeForce 9600 GSO (756MB)

Let me know if you have any ideas. Thanks a lot.

I'm not sure whether this is the correct answer, but you may need to re-install your chipset drivers.

If it is a self-built computer you should be able to get them from the motherboard manufacturer.

If it is a computer bought from a manufacturer then you'll need to go to their driver support site.

It's a custom built computer. I checked the mobo website for driver downloads, and there aren't any new ones. It's a Gigabyte motherboard, and one thing I noticed while on their website is they have a downloadable program allowing the mobo to quick-charge phones via USB, no matter the power state of the computer. I would doubt it, but perhaps this has something to do with the error. I have not installed the program.

If it matters, the mobo is a GA-MA785GM-US2H, rev. 1.1.