Very obscure problem

[Crazed Milk Pile]

This stemmed from me cleaning out my case. I disconnected and reconnected about everything as I dusted and rearranged my bad cord layout. Now I can no longer use any USB ports, including the ones on my case which I've never even plugged into my motherboard before this. My MP3 player charges, my wireless keyboard/mouse base lights up until I try to connect something, at this point it shuts off. I've tried using usb devices while running a boot disc, no luck, and previously my bios could use usb keyboards. Seems to be a hardware problem. Rearranged my ram a few times, ran several hours of the memtest included with Windows 7 x64 5057, no problems detected. Messed with the bios settings a few times, reset it and ran defaults, nothing seems to have any effect. The only thing I haven't tried is reconnecting my PCI TV Tuner I removed and never replaced but I can't see how this would do anything.

I've been trying to figure out the answer for a long month now, and I'm guessing a new motherboard might be my only option. My CPU was overheating before I took everything apart due to dust in the heatsink, while reconnecting everything apparently the heatsink wasn't on all the way and this caused it to overheat a few times massively until everything just shut off.

Specs: Core 2 Quad Q6600 G0, 8000GT 512mb, 6GB ram, MSI mobo with an Nvidia chipset.

 

[Porter21]

I know under XP you can go under power management while under device manager (under USB root hub) and uncheck to turn off to save power. My iphone used to act like it was plugged in, but wouldn't charge until I de-selected this. Barely used Windows 7, so I'm not much help with that. Obviously your USB headers must be plugged into the motherboard right? Are you sure of this?

 

[Crazed Milk Pile]

Yeah, this problem is somewhat the opposite of that, it gives me enough power to charge my MP3 player, and yes the USB header for the case USB is plugged in and those USB ports act the same way.

 

[GaryJohnson]

If the rear motherboard USB ports don't work at boot with a USB keyboard, then it almost has to be a hardware problem.

This is the first time you connected the case USB ports to the USB headers? Have you tried disconnecting those case USB ports to see if that makes the rear ports work again?

The other thing to check would be any USB related BIOS settings. Maybe they were somehow changed or reset.

 

[Crazed Milk Pile]

Yeah I've tried unplugging the header, doesn't seem to do much. The USB settings in the BIOS are good, legacy is enabled.

 

[Crazed Milk Pile]

Still no progress yet, gonna be a while before I can afford a motherboard. I'm guessing I fried mine when I overheat the processor about 15 times to 95C ish before it auto shut off.