February 22nd, 2010, 06:27 PM
Thumbdrive turns off computer
We have a Windows 2000 computer. Almost everytime the user inserts a usb thumbdrive, it shuts the computer off. Like it had the power plug pulled out.
Does anyone know what the problem maybe?
Thanks in advance.
February 22nd, 2010, 06:59 PM
Sounds like a short circuit to me. Does this happen on every USB port or just one in particular?
February 22nd, 2010, 07:08 PM
The tower has the standard rear usb ports then a four usb port in the front. The rear never gives me issues, however the front does. It tends to be all of them and on nine times out of ten.
February 22nd, 2010, 08:20 PM
Yeah, sounds like faulty front USBs. Might be grounding out or something.
You may open the computer up AFTER unplugging it and check for exposed wires or anything visually wrong with the front USB connection to the motherboard. Its a long shot, but may be worth the effort.
February 23rd, 2010, 12:46 AM
I will agree with phalse as I have run into this myself and it indeed was a faulty usb port. What happened was the plastic piece inside the usb port was broken and fell out causing the wires to touch and short when a usb was plugged in.
<chsh> I've read more interesting technical discussion on the wall of a public bathroom than I have at AO at times
February 23rd, 2010, 03:55 AM
Areyou sure the usb wires are connected to the motherboard correctly? I have had that happen in the past were i hadn't correctly connected them to the right pin and it caused all sorts of issues.
February 24th, 2010, 08:14 PM
The simplest solution is to buy an external 4-Port hub and connect it to one of the rear ports. There is enough power for flash memory sticks.................just position it ontop of the computer where it is easy to get at.
February 25th, 2010, 04:50 PM
Have you had problems with the front USB ports in the past? Eg. USB device not recognised? Have the front USB ports worked at all previously.
A faulty power supply may be to blame if this is the case. The extra 5V used to power the thumbdrive might cause the supply to cut out if it is on the fritz.
If the front ports have never worked, then it is most likely a wiring issue.
"Any intelligent fool can make things bigger and more complex... It takes a touch of genius --- and a lot of courage to move in the opposite direction."
- Albert Einstein
March 2nd, 2010, 02:00 AM
I am having this same problem and have basically narrowed it down to being a hardware issue, but a little advice would be appreciated.
I built a computer in Aug. and everything was working great for several months. Back in December out of the blue the front USB would shut down the computer when I plug in my thumb drive. This is the first I am getting to look at it and tried a few things to help narrow down possibilities. I plug in a USB extension cable with nothing attached and that shut it down, so I know it is not a voltage problem. I plug a set of headphones in, which shares the header and that shut down the computer. So I now know it has to be a hardware problem.
I opened everything up and the USB header is a block of plastic with sheathed wires coming out so to the best I can see there are no bare wires. I plugged in my iPod cord with the computer off and booted up with no problems and plugged in the iPod and unplugged it with no problems.
The rear USB (the ones right on the motherboard) do not cause the shut down. The mother board is touching the case through the rear plate, where the metal tabs apply pressure. I used brass standoffs and the red washers between the screws and the motherboard, so I think the motherbord should be grounded properly.
I think it is a problem in the header, but if anyone else has any ideas I would appreciate any help.
March 2nd, 2010, 03:30 AM
I have some w2k machines still kicking around....and have had nothing but problems with USB on those machines...a full shutdown will usually fix the issue....until the USB gets knocked out again....
If USB is required I update them to XP...
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