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USB ports not recognized


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#1 Elise

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Posted 06 May 2009 - 09:58 AM

Hi all,
I am helping my friend to reconnect her modem (telephone-modem, provided by her phone-company, she has received it back after supposed technical issues, so the modem is checked). She just called me to ask why she cannot connect.
I told her to look in networkconnections and it says the modem cable is unplugged.

Now the problem is as follows. She has 8 usb-ports, 2 in front and 6 in the back. I know that one of her front usb-ports is not working (trouble with pendrives etc.). She recently tried to use an usb-mouse, it didnt work, but on the one front port and even then not too well (mouse locked up etc.). She switched back to her old ps2 and that worked fine.

I have the impression that most of her usb-ports are malfunctioning due to a hardware issue. I reformatted her system a few months ago and made sure all drivers were installed, up to date, no ?'s and !'s in the device manager.

How can I check the status of her usb-ports (they are enabled in BIOS and appear in device manager) and how can I check on her motherboard if everything is connected as it should?

Any help/advice is appreciated!

regards, Elise


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#2 fairjoeblue

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Posted 06 May 2009 - 10:27 AM

Front USB on some computers can be pretty picly about what will work, especially on older computers.
As for testing the ports that can be a little tricky for the previosly stated reason.
[I have 1 jump drive that won't work on some computers front USB ports but other jump drives that work with no problem]

I am a tad puzzled by the problem.
A dialup telephone modem is a device [add-in card usually] that goes inside a computer & attaches directly to a phone line.

A DSL modem is a external device that hooks to a phone line & then to the computer.
It usually uses a cable from the DSL modem to the NIC [alsoc called LAN or Network] port on the computer.
Although I have neve3r seen one connected to a USB port I suppose it is possible since cable modems can be attached to a USB port.

If it is a DSL modem that connects to a USB port have your friend try a different USB device in the rear USB ports.
When one is found that works hook the modem to it.

If a motherboard has some USB ports on the back that work & some that don't it could be simply that the faulty USB ports are physically damaged.
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#3 Elise

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Posted 06 May 2009 - 11:17 AM

The computer is two years old maybe.
Sorry I didnt explain exact about the modem.
Its a phone which picks up a wireless connection (from a mobile network) the phone has an inbuild-modem and a usb-cable that connects it to the PC. The connection is setup as dial-up with a speed of 256 kbps. I have set it up myself and contacted the telephone-company to ask about drivers. They explained no drivers are needed and it is configured correctly (it worked fine).
Anyway she has found a port that works, so its not an urgent problem now, but when I am going to visit her, I want to take a look inside and before doing so I want to know what/how to check if the ports are connected as they should to the MoBo.

regards, Elise


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#4 garmanma

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Posted 06 May 2009 - 11:55 AM

As far as the USB problem goes, have a look in Device Manager and see if there are any yellow exclamation points by the USB hub controllers
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#5 fairjoeblue

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Posted 06 May 2009 - 12:33 PM

The rear "onboard" USB ports are soldered to the motherboard,

The front USB ports will have a set of wires from the USB ports that connect to a set of pins on the motherboard.
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#6 Elise

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Posted 06 May 2009 - 12:38 PM

Garmanma, I did that already (well, she did) and everything is fine
Fairjoeblue, thanks, I will check them.

regards, Elise


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