Top USB Port not working

[psimpellon]

The top USB port in my newly bought Pi (model B) is not working.

I've plugged in a keyboard and xbox controller into the bottom port and they work fine, however when I plug them in to the top port, the lights on them light up for a second and they aren't detected.

Is ther any further trouble shooting steps I should follow, before assuming the hardware is faulty?

I'm powering the pi with a 700ma adapter, however I wouldn't have though power would be an issue with one keyboard connected.

[micky2171]

I am having the same problem, but none of my USB ports are working.

If anyone knows why or how to fix it... please reply and help.

Thanks,
Mick

[drgeoff]

I am having the same problem, but none of my USB ports are working.

If anyone knows why or how to fix it... please reply and help.

Thanks,
Mick

First port of call is to check the Voltage the RPi is getting. If you don't know how to do that put "raspberry elinux wiki troubleshooting power" into a search engine".

[klricks]

The top USB port in my newly bought Pi (model B) is not working.

I've plugged in a keyboard and xbox controller into the bottom port and they work fine, however when I plug them in to the top port, the lights on them light up for a second and they aren't detected.

Is ther any further trouble shooting steps I should follow, before assuming the hardware is faulty?

I'm powering the pi with a 700ma adapter, however I wouldn't have though power would be an issue with one keyboard connected.

I would look into the top port and verify that there is no foreign material stuck inside.
Check that the contacts are not bent or damaged. Compare with the bottom port.

Check the 8 USB port solder connections on the bottom of the board. Verify that there is solder and that the solder is not fractured. Use a magnifier. Try to wiggle each protruding wire lead with your fingernail or a small screwdriver and move back and forth. If any solder connections are broken it will be obvious.

[micky2171]

I am having the same problem, but none of my USB ports are working.

If anyone knows why or how to fix it... please reply and help.

Thanks,
Mick

First port of call is to check the Voltage the RPi is getting. If you don't know how to do that put "raspberry elinux wiki troubleshooting power" into a search engine".

I am using a blackberry charger

[tarababa]

Hi "psimpellon"

Was your problem with the TOP USB port not working ever resolved?

I have the same problem, top USB port is not working. I am fairly certain the problem is not caused by the usb devices attached, a mouse and a keyboard which work fine on my other pi's.
I can swap mouse an keyboard between top and bottom usb port, the device in top usb port won't work, the one in the bottom port will.

To work around I use an external usb.hub (non-powered) in the bottom usb port, both keyboard and mouse attached to the external hub, in this configuration all works fine.

I would however still like to get the top usb port to work. Looking into the top port and comparing it with the bottom port it looks as if the two center pins of the top port protrude less then those of the bottom port, however it feels like they should make contact...

Power supply should not be an issue either (5V 2.4A)

Any help / suggestions would be much appreciated, although this is a brand-new PI (model B, rev 2 so no poly-fuses) I'm not keen on going through the hassle of sending it back..

[tarababa]

Hi "psimpellon"

Was your problem with the TOP USB port not working ever resolved?

I have the same problem, top USB port is not working. I am fairly certain the problem is not caused by the usb devices attached, a mouse and a keyboard which work fine on my other pi's.
I can swap mouse an keyboard between top and bottom usb port, the device in top usb port won't work, the one in the bottom port will.

To work around I use an external usb.hub (non-powered) in the bottom usb port, both keyboard and mouse attached to the external hub, in this configuration all works fine.

I would however still like to get the top usb port to work. Looking into the top port and comparing it with the bottom port it looks as if the two center pins of the top port protrude less then those of the bottom port, however it feels like they should make contact...

Power supply should not be an issue either (5V 2.4A)

Any help / suggestions would be much appreciated, although this is a brand-new PI (model B, rev 2 so no poly-fuses) I'm not keen on going through the hassle of sending it back..

Issue seems to have been resolved, unfortunately I cannot post a conclusive cause for the issue. I want ahead and replaced, SD card, mouse, power supply and removed camera, then the top USB port worked. So one by one a restored the original components to try and pin-point the cause of the problem.

Eventually with all components except the mouse being back to what they were before, the top USB port was still working, but alas after 10-15 minutes the mouse, in the top USB port would disconnect and nothing would be detected on the top port until power was removed. I then switched to yet another, known good, power supply, this seems to have eradicated to problem...

However then I went back to the original setup including mouse and expected the top USB port to malfunction as before, the top USB port performed admirably.

Maybe it was a mechanical problem after all, to verify the USB connector was soldered on properly I measured resistance between data connections in the connector it self and the soldered points on the PCB, the prodding may have fixed it ( I would expect temporarily)

So unfortunately no conclusive answer as to what cause the issue, as I cannot reliably reproduce it.

[jr57k]

I am having the exact same issue. I've checked the solder joints and the connector. Both appear to be fine. When I use a mouse and keyboard they work fine in the lower USB and on a USB hub connected to the lower USB but neither will function on the upper USB. They both are powered on the upper USB but are not detected as HID devices. I'm running an original Model B.

[DougieLawson]

I am having the exact same issue. I've checked the solder joints and the connector. Both appear to be fine. When I use a mouse and keyboard they work fine in the lower USB and on a USB hub connected to the lower USB but neither will function on the upper USB. They both are powered on the upper USB but are not detected as HID devices. I'm running an original Model B.

Have you mushed the pins in the socket? That's a common failure caused by being too ham-fisted when inserting a plug.

[mahjongg]

there is nothing special about either the top or bottom USB connector, they are both connected in the same (straightforward) way to the very same chip.

I support dougies conclusion that its probably something mechanical.