Guest Digger Posted October 13, 2008 Posted October 13, 2008 This just started happening about a week ago. When I try to connect my iPod or cell phone via their respective cables to the USB ports the computer shuts off. I've done a system restore and checked the Device Manager and nothing seems to have the answer.
Guest philo Posted October 13, 2008 Posted October 13, 2008 Re: Connecting to USB port shuts off computer "Digger" <Digger@discussions.microsoft.com> wrote in message news:D1EE029D-9E90-49D7-B38D-6AF4C22A4343@microsoft.com... > This just started happening about a week ago. When I try to connect my iPod > or cell phone via their respective cables to the USB ports the computer shuts > off. I've done a system restore and checked the Device Manager and nothing > seems to have the answer. I've seen that due to static electricity... especially on ECS motherboards
Guest Jim Posted October 13, 2008 Posted October 13, 2008 Re: Connecting to USB port shuts off computer "philo" <philo@privacy.net> wrote in message news:ONCQovNLJHA.5648@TK2MSFTNGP05.phx.gbl... > > "Digger" <Digger@discussions.microsoft.com> wrote in message > news:D1EE029D-9E90-49D7-B38D-6AF4C22A4343@microsoft.com... >> This just started happening about a week ago. When I try to connect my > iPod >> or cell phone via their respective cables to the USB ports the computer > shuts >> off. I've done a system restore and checked the Device Manager and > nothing >> seems to have the answer. > > > > I've seen that due to static electricity... > especially on ECS motherboards > > And, if it is static electricity (which seems highly likely), your only recourse is to proceed as follows: Disconnect every thing from the computer. Unplug it from the convenience outlet. Press the start switch. Connect everything back to the computer. Plug it back into the convenience outlet. You are now ready to try operating the computer. Jim
Guest GlowingBlueMist Posted October 13, 2008 Posted October 13, 2008 Re: Connecting to USB port shuts off computer "Digger" <Digger@discussions.microsoft.com> wrote in message news:D1EE029D-9E90-49D7-B38D-6AF4C22A4343@microsoft.com... > This just started happening about a week ago. When I try to connect my > iPod > or cell phone via their respective cables to the USB ports the computer > shuts > off. I've done a system restore and checked the Device Manager and > nothing > seems to have the answer. It sounds like the power supply is dying. When you use the USB port it passes the 5 volts from the power supply to the external device. The extra load from the external device is pushing the power supply just enough to make it go critical and shutting down. One last thought is to try another USB cable in case the one you are using is shorting out the 5 volts.
Guest Paul Posted October 13, 2008 Posted October 13, 2008 Re: Connecting to USB port shuts off computer Digger wrote: > This just started happening about a week ago. When I try to connect my iPod > or cell phone via their respective cables to the USB ports the computer shuts > off. I've done a system restore and checked the Device Manager and nothing > seems to have the answer. You are overloading +5VSB coming from the power supply. If the motherboard is old enough, there will be a USBPWxx jumper header, where you can switch between using +5VSB or +5V for the USB port. +5V has more amps to offer, so using +5V will not cause the computer to reset. The +5VSB not only powers part of your computer, but is also part of the "PS_ON#" signal from motherboard to PSU. If +5VSB is flattened (by being shorted), then the power supply will switch off. The iPod may be attempting to draw battery charging current. As a test, you can try plugging something other than an iPod, such as a mouse, as it only draws 100mA or less. If the computer stays running, then you'd have a suspicion that either the power supply is weak, or something else in the computer is using more than its share of +5VSB. The +5VSB rating is printed on the label on the side of the power supply. My brand new supply, is rated for +5VSB at 3 amps, a bit stronger than the old supply. A motherboard might typically use 1 amp while the computer sleeps, from that rail, but modern motherboards also run the USB ports from that rail, and that could potentially lead to an overload, if you have stuff like USB scanner, USB ADSL modem, iPod or other stuff that are known current hogs. Paul
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