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USB issues

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3 replies

by jfrank54

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I am working on an issue for a client. I have spent 2 days on this already. Front and rear USB ports on ASUS motherboard will not recognize Ipod or flash drives, but will recognize headphones, keyboards or mouse. Problem first arose as it was relayed to me when an MP3 player was installed. After that could not resolve issue. Have tried all the usual steps including removing software, cleaning registry, rebuilding USB root hub stack, reinstalling USB drivers, upgrading chipset, and upgrading BIOS . After all troubleshooting procedures exhausted I decided to perform a Windows XP repair. This did not work. I then backed up the PC and did a clean install Installed the drivers, applications, downloaded windows updates including SP2. The problem is still not resolved. Of note is that the IPod and flash drives do work in the usb1 PCI card that is installed. Only the integated ports are not working. My client refuses to pay me as I have not resolved the issue. As I said before, I have spent 2 days on this. Any thoughts? Does the motherboard need replacing?

3 replies

by older mycroft

Having been introduced into the onboard usb circuit?

This would've trashed the onboard usb.

by thechas

I'm in line with Old Mycroft here.

I think the root problem is that the MP3 player draws more power than the on-board ports can provide. It damaged but did not break the on-board power supply which is why low power devices still work.

The simple way to verify this would be to connect a powered hub to one of the on-board ports and see if you can run one of the other devices through the hub.

If you can run devices off of a powered hub, a new motherboard is a fix, but not a solution.

Your client needs USB 2.0 ports with full power available. Some USB 2 cards now come with the option of providing device power directly from the power supply rather than using power from the motherboard.

Chas

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