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Asus P8Z77-V LX | Rear USB problem.

Last response: in Motherboards
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July 28, 2013 5:23:48 AM

I have just recently built my first PC. All works, but I have some issues.

Specs:
Intel Pentium G2130 3.2Ghz
4GB Corsair Vengeance RAM DDR3
Sapphire AMD Radeon HD 7790 1GB GDDR5 OC Dual-X
500GB WD Caviar Blue
Asus P8Z77-V LX ATX Motherboard
NZXT Phantom 410 Black

I had troubles putting the IO shield into the case, it felt cheap and easy to cut your self on. I could just not get one corner in. The corner I could not get in has two USB 2.0 ports. The motherboard went in okay but the IO shield had a lot of things that stick out and they were sticking into the ports so I sept 10 minutes trying the get the motherboard into the IO shield properly with out the sticking out thing sticking into the ports. The system fired up fine, I installed all of the correct drivers (my OS is Windows 7 Home Premium 64bit). The two USB ports on the side of the IO shield I could not work. When ever I plug a USB into the port the system switches off. Then after 5 seconds it reboots and tells me that ASUS Anti-Surge has just protected the system. I knew this was a problem so I took the motherboard out and I smacked the IO shield with the back of a screwdriver and it finally snapped in. Then I spent another 10 minutes trying to fit the motherboard in properly. After I put it back together the system booted up fine but I had to put the time and date into the BIOS again? Then I tried a USB again. ASUS Anti surge kicked in again. It does it every time, all other rear USB ports work? I dont see even if the IO shield was slightly out of place it would have broken the motherboard? Can anyone help me? Is it a factory problem with the Motherboard?

Thanks

Best solution

July 28, 2013 6:45:52 AM
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cal296 said:

I had troubles putting the IO shield into the case, it felt cheap and easy to cut your self on. I could just not get one corner in. The corner I could not get in has two USB 2.0 ports. The motherboard went in okay but the IO shield had a lot of things that stick out and they were sticking into the ports so I sept 10 minutes trying the get the motherboard into the IO shield properly with out the sticking out thing sticking into the ports. The system fired up fine,... When ever I plug a USB into the port the system switches off. Then after 5 seconds it reboots and tells me that ASUS Anti-Surge has just protected the system.

Thanks

It seems what is happening is that when you plug in the USB connector, you slightly move one of the metal flaps which shorts the USB power to ground.

Unscrew the mother board and move it away from the io shield then bend up the metal flaps so when you put back the motherboard the flaps rest on top of the ports and not inside them (and not underneath them), or near the electrical connections.

Failing that remove the IO shield completely and try again. If with the IO shield completely gone you still get a hard reset, then the motherboard is the problem. But I would be surprised. Most likely the IO shield flap causes a short.
July 28, 2013 7:20:21 AM

BoyFromAuckland said:
cal296 said:

I had troubles putting the IO shield into the case, it felt cheap and easy to cut your self on. I could just not get one corner in. The corner I could not get in has two USB 2.0 ports. The motherboard went in okay but the IO shield had a lot of things that stick out and they were sticking into the ports so I sept 10 minutes trying the get the motherboard into the IO shield properly with out the sticking out thing sticking into the ports. The system fired up fine,... When ever I plug a USB into the port the system switches off. Then after 5 seconds it reboots and tells me that ASUS Anti-Surge has just protected the system.

Thanks

It seems what is happening is that when you plug in the USB connector, you slightly move one of the metal flaps which shorts the USB power to ground.

Unscrew the mother board and move it away from the io shield then bend up the metal flaps so when you put back the motherboard the flaps rest on top of the ports and not inside them (and not underneath them), or near the electrical connections.

Failing that remove the IO shield completely and try again. If with the IO shield completely gone you still get a hard reset, then the motherboard is the problem. But I would be surprised. Most likely the IO shield flap causes a short.


Thanks for the reply, I've tried to get the motherboard fitted right with the IO sheild.

The two affected ports:



And the whole IO:



Im scared of it not turning back on when I plug in a USB or when I try to fiddle with teh IO shield. Asus chat support is offline today but I'm going to try that tomorrow, that IO shield is so damn awkward! Thanks for helping.
!