USB ports going in and out

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J

jaydee

Diamond Member
May 6, 2000
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For the system in my signature, a few months ago, two of the USB ports in the back of the motherboard stopped working and haven't worked since. To compensate, I have a 7-port hub on a different USB port. Today another pair (the ones going to the front panel of my case) stopped working while I was on the computer. They came back after I rebooted, but I'm a little concerned my motherboard is dying. If I lose USB, I'm pretty much done for. I have a printer, webcam, mouse, keyboard, TV Tuner, cable to smartphone, cable to SD card reader that are all pretty necessary.

Does it sound like my motherboard is dying, am I going to have to replace it soon?
 
denis280

denis280

Diamond Member
Jan 16, 2011
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jaydee said:
I have a printer, webcam, mouse, keyboard, TV Tuner, cable to smartphone, cable to SD card reader that are all pretty necessary.
Click to expand...
I would start by testing the psu.Just your phenom is pulling 125 watt
 
Z

Z15CAM

Platinum Member
Nov 20, 2010
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The vcc1 is the 3.3V rail controls things like the ASIC IO and USB chip. If the rail is too low it can cause issues you describe. You can read the 3.3v rail voltages in apps like HardWareMonitor Pro or SpeedFan. Entering BIOS will also show the voltages.

Before you test or think about changing out the PSU I would disconnect the MB ATX POWER connectors, blow them out and ensure they are thoroughly clean and make sure they are well seated to see if the 3.3v rail maintains between a 3.14v to a 3.47voltage.
 
BonzaiDuck

BonzaiDuck

Lifer
Jun 30, 2004
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How old is the mobo?

I agree with the others: test your PSU.

I have an (old, but doesn't seem like it) eVGA (NVidia) 780i system upstairs. My bro uses it. there is one USB2 port that stopped working, raising a message at every bootup. All the rest continue to work. This has been a status-quo with that system for about two years. Even so, we'd put a PCI USB controller in it with some four -- maybe five -- ports. Nothing wanting, really. The PSU is tip-top -- Seasonic, capability pretty much above the maximum hardware requirement.

I just came out of a little panic and puzzlement over my system's onboard Asmedia USB 3 controller. First, I thought the controller itself was dead. But it was feeding a $25 front-panel 3.5" 4-port hub -- which had always worked. I hadn't plugged anything into it for four months or longer! And it looks pretty much to be dead! Went back to the Egg to find that unit, and customer-reviews which followed my own purchase complained that it had "voltage surges."

You might want to check and see if this is a misbegotten driver installation, but I think the OS provides all the drivers for USB2 unless they're proprietary.

If there's nothing further wrong with the motherboard -- all the other features work -- and you need more ports, consider getting an add-in card. I don't think they're more than maybe $15 -- something in that ballpark, anyway.
 
J

jaydee

Diamond Member
May 6, 2000
4,500
3
81
Z15CAM said:
The vcc1 is the 3.3V rail controls things like the ASIC IO and USB chip. If the rail is too low it can cause issues you describe. You can read the 3.3v rail voltages in apps like HardWareMonitor Pro or SpeedFan. Entering BIOS will also show the voltages.

Before you test or think about changing out the PSU I would disconnect the MB ATX POWER connectors, blow them out and ensure they are thoroughly clean and make sure they are well seated to see if the 3.3v rail maintains between a 3.14v to a 3.47voltage.
Click to expand...

I thought USB power is 5V? I will check HWMP after work today and report back all the voltages.

I know I've "overloaded" one of the USB port at least once before. A couple weeks ago, I had wireless keyboard dongle, USB mouse, smartphone all on a USB hub and when I plugged in a USB-powered external hard drive on the same hub, I lost my connection to the smartphone. I've avoided putting the external hard drive on that hub since then...

How old is the mobo?
Click to expand...
I'm pretty sure I put this together in the fall of 2010, so 3.5 years old.

If there's nothing further wrong with the motherboard -- all the other features work -- and you need more ports, consider getting an add-in card. I don't think they're more than maybe $15 -- something in that ballpark, anyway.
Click to expand...
It's a Mini-ITX board, I only have one PCI-E slot and my video card is in it (which I need because I do triple monitors.
 
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J

jaydee

Diamond Member
May 6, 2000
4,500
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81
Used SpeedFan.

3.3v line: 3.29-3.31V
5V line: 5.00-5.02V
12V line: 11.74-11.80V

Really glad I checked though, I didn't realize I still had a voltage bump and overclock on my system! I was hitting 75C before throttling down. Brought CPU back down to stock and lowered the voltage from 1.425 to 1.35 (1.375 is stock), temps are way more reasonable handbrake encoding now :)
 
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