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dead usb ports

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by robrog

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i have a INTEVA pc with a usb problem. i have checked all the normal culprits to no avail.It powers up device on startup but then drops it upon completion.Im running win98 o.s.In device manager it labels the device as unknown with no drivers installed,even though i have run manufacturers install software.Someone please suggest a program or advice on how to diagnose this problem.THANKS IN ADVANCE rg

3 replies

by thechas

2 ideas:

1. Enter BIOS settings on boot-up, and verify that the ports are enabled.
(The default setting on many PCs is disabled)

2. If the motherboard is not an ATX style, make sure that the cable for the USB ports is properly connected to the motherboard.

Chas

by robrog

it is ATX style board and all solder conn. and printed circuit runs look great.I have turned on all related bios settings.when you first plug in a device it powers up and windows(doesn't matter which one)starts loading up drivers for unknown deviceat about the time the device powers down never to return.reloading the right drivers into system doesn't work because windows ignores them anyway. thks RR

by thechas

Okay, I wanted to start with the standard problems.

What happens if you have no devices connected to the USB ports?

Do the USB ports and root hub show up in device manager?

Do you have the USB drivers for the chip-set on the motherboard installed?

For help identifying the chip-set, download and run the free tool at www.belarc.com
Belarc Advisor will give you a fairly detailed report on your PCs configuration.

Next, some motherboards limit how much power is available on the USB ports.
For many devices, you need to install a powered USB hub in order to provide enough power to run the device.

If all else fails, the final solution may be to disable the USB ports in BIOS settings. (Make sure to remove them from device manager first.)
And install a PCI USB 2.0 card.

Chas

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