USB devices not mounting in one port?

I have two late 2007 MacBooks, neither of which reliably mounts a USB device plugged into the port closest to the firewire port on the left side. These two MacBooks were purchased within a week of each other about four months ago. I have returned one of them for factory repair of this problem. This was actually the second repair, since a few weeks previous the mainboard failed catastrophically.
The repair consisted of replacing the hard drive. The tech ("genius") at my local Apple store said it had been a software problem. I reinstalled each software package while testing for the problem to re-emerge, and it seemed to happen when I installed Skype for Mac 2.7.0.330. This may have been coincidental, since the problem doesn't occur when Skype isn't running, and the other MacBook doesn't have Skype installed on it at all. If I cold restart this Macbook, a USB device in the port in question will mount.
Has anyone experienced anything like this? Any tips will be appreciated!

I found this article whilst researching which external drive to buy to use with my powerbook and a future macbook purchase: All USB ports aren’t created equal
Could this be the cause of the problem - specifically that the problem port is not supplying enough power to your external drive because it's also powering the iSight etc?
Regards, Andrew.

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"USB Device Not Recognized. One of the USB devices has malfunctioned..."

I'm running Windows XP with external hard drive. When hard drive is connected, iPod will not sync and I get message stating "USB Device Not Recognized. One of the USB devices has malfunctioned..."
When disconnect the external drive, he iPod appears in My Computer. However, iTunes is on external drive; therefore music is not syncing onto iPod. I've attempted the 5 R's as well as searching for iPod in Device Mananger. When iPod is conncected, it is listed in Devce Manage as "Unknown Device."
I've changed drive letters on boh iPod and external drive and get the same message. Please help.

QRe: Zen MX Causes "USB Hardware has Malfunctioned" Msg from Windows XpyUhh, Yes.
I used to same cable to attach my Motorola Razr and the computer correctly found it and identified it as such.
I also tried another cable (brand new) same thing.
I went to recovery mode and did a "CLEAN UP" but no dice.
I also got my I.S. tech guy to look into it and on the USB page it say "UNKNOWN DEVICE"? when he tried to delete it it did not help, it just reappears as "UDVC"? Also in looking into it it seems to have no drivers.
He came to this site and tried to do somethinm through here but it did'nt work.
Now in listening to it last night it began to 'skip' or what I call 'HICCUP" terribly. Where a song starts and stops, during the middle of it. ? It's always done it a little but it has been getting more and more common and now? It's WAY worse about it.
It has never been dropped, or nishandled in any way. I bought the clear hard case to protect it. And only has about 300 songs on it. Never used for anything else. No vids no pics, nothing.

Ipod "usb device not recognised" on one computer but works with another!

I have a 60GB ipod video and a 2GB ipod nano. Both connect fine to itunes on my work laptop but will not connect to my home laptop. They have previously worked fine with the home laptop but now when conected the message "usb device not recognised one of the usb devices connected to the computrt has malfunctioned". I have tried reinstalling itunes several times and tried the usual reset of the ipods etc but nothing seems to work.

If you have more then one USB port, try the other port.

A thousand USB questions .. later why do USB devices not mount/stop working

I know this is loaded post but I'm getting really torqued at the USB sub-system in OS X.
I bought a mini ~2 years to see what the OSX scene was like, so far it's mostly been a great OS but the USB problems past at work, on my home system only cropped up in the past few months is very frustrating. :-P
I've done the googling, apples pathetic troubleshooting pages, run the Profiler and USB Prober trying to determine all with no luck.
Can any of you help me "get it"?
At work, we had a OSX server a few years that failed to stop mounting a USB drive that had been used several time before. It was under support and Apple failed to resolve the problem!!
I had a Transcend usb enclosure that worked in 10.3 and by the time 10.4 rolled around it stopped working (checked on a few different macs)
Now I have a iogear gfr280 memory card reader/writer that worked three months ago and just tried to use it the other day ... borked!!. I then take it to work plug it into my co-workers iMac running 10.5, mounts up and I can copy my photos off the SD card, no issues. WTH!?
Also, just the other day my digital camera powershot A630 batteries ran out right as I was importing... Took me three hours of reboots, plugging in my thumb drive and camera only to have them show up for a split second then disappear from iphoto or the desktop.
I even thought of calling Apple on this one but I'm leary based on prior experience with the server incident.
This is even worse than under Linux(run that too), most times the kernel either supports the device or it doesn't ( I can live with that! ). None of this .. I'm gonna work and then all the sudden stop one day.
Anyone? Would it be worth paying for a one-time support call?

Try things in this USB faq.
DALE

Libretto - USB Device Not Recognised error message

Hi there
I have a workaround for this problem which ocassionally happens. It is just to reconnect the USB hub(as recommended by Windows). I was just wondering if someone knows why this happens and how to fix it. The error is :--
"USB device not recognised. One of the USB devices attached to this computer has malfunctioned, and windows does not recognise it.
USB Roob Hub (2 ports) - Unused Port, Unknown Device.
Recommendation: try reconnecting the device. If Windows still does not recognise it, replace the device. "
I look forward to hearing back from you.
Kind regards
Julia.

Hello Julia
It is always advantageous to mention which model you have exactly. Obviously the external device is not recognized correctly. Check if there is some driver that must be installed before you can use it properly.

USB Device Not Recognized - Palm 700p Verizon

Hi,
Yesterday morning I could sync, yesterday afternoon I got the error message "USB Device Not Recognized. One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it." Sometimes when I click on the associated error pop-up message, it shows the location of my "unrecognized device" but sometimes nothing shows up.
I've seen a couple of posts on the web generally about this, but not about the 700p. I've tried rebooting the computer, tried syncing to a different computer, tried rebooting the phone, and blown out the contacts. I don't want to buy a new USB cable if I can help it because I'm thinking about getting a Pre anyways (although the fact that I can't seem to use Palm's chat function through either Internet Explorer or Firefox is starting to dissuade me).
Anyways, is there anything else I can try to resolve the issue with my 700p or should I just give up?
Thanks,
Margaret

if you already tried your phone and USB cable to a different USB port and computer then the problem could be in either the phone or the cable. if you don't want to buy a new cable because of your plan. maybe you can visit a store near you where you can borrow a cable or PC. at least you trying to make sure which is defective. in cases like this, the cause is the USB cable.

"USB Device Not Recognized", and I tried the 5 R's and all that....

OK, I just got a new shuffle, and my computeris also new. I am using a Dell with Windows Media XP. I also just installed iTunes 7.5.
Whenever I place the shuffle on the dock the charging light comes on for a few moments, then I get the pop-up message:
"USB device not recognized. One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it. No drivers are installed for this device."
Then the charging light turns off.
iTunes does not show any "source" or recognition of the shuffle being attached.
My sons recieved Scandisk mp3 players and they are both working on my new computer with no issues.
I did try to remove iTunes from my computer, re-install, and then dock the shuffle again, and got the same results.
Any suggestions?
Thanks.
Windows XP

I have experienced the same problems and frustration as many of you with Windows not recogizing the shuffle. Looking to forums, changing drivers, using another computer for answers.
The shuffle I purchased for my wife did not work with our primary laptop (Windows XP 1.1 usb ports) but it worked successfully with another laptop (same OS and usb version).
Grasping at straws, I remembered I had a USB extension cable and connected the shuffle usb connection in the extension cable and the extension cable into the usb port of my PC. It worked. It seemed to make a better and more snug connection with my laptop usb port than the usb connection with the shuffle.
ITunes also recognizes the shuffle. I am curious if this resolves the issues many of you are having.

Ipod 7th generation. bought it 3 days ago. no problem then but now won't turn on. I keep getting a usb device not recognized (and i keep changing ports to no avail). what to do?

ipod 7th generation. bought it 3 days ago. no problem then but now won't turn on. I keep getting a usb device not recognized (and i keep changing ports to no avail). what to do?

wish i can rmber how mine was fixed i think i just waited tried again and likr magic it worked again left itunplugged, i was like you recently boughtand it happened to me, now i have another diffrent promblem with it.

My ipod 4 when i plug it to my pc Windows 7 had worked fine for 8 months then one day i plug it in and a message came USB device not recognized, i tried reset network settings and nothing called apple they did not know any help out there TX

My ipod 4 when i plug it to my pc Windows 7 had worked fine for 8 months then one day i plug it in and a message came USB device not recognized, i tried reset network settings and nothing i did not install any software before this happend i called apple they did not know, any help out there TX

Start here:
iPhone, iPad, or iPod touch: Device not recognized in iTunes for Windows

I have an Iphone 5S and used to sync it to my computer in the past without any problem, but now I can't and appears the message "usb device not recognized", and the cable is good and so the USB port. Do you have any idea what's the problem?

I have an Iphone 5S and used to sync it to my computer in the past without any problem, but now I can't, and appears the message "usb device not recognized", and the cable is good and so the USB port. Do you have any idea what's the problem?

Try leaving it plugged in and then restart the computer.
If you are on Windows this link may help but it is a bit old.
http://www.technologynext.org/error-usb-device-not-recognized-how-to-fix/

Sorry one more question, "USB Device not recognized" ???

I got this new iPod dock, called the Harman/Kardon GO+PLAY, they say it should sync with all new iPods... when i connect this dock to my computer through the USB, and then I connect my iPod to the dock, it always says on my computer, "USB Device not recognized". Does anyone know how to fix this?

try to update the driver in your device manager.. right click on palm handheld then update driver...
if not successful..
try this..
Force Un-installation of the Device Driver.
Close all running programs.
Open the Run Application.
Click Start.
Click Run.
Type “cmd” (without the quotes) then click OK. The Command Window will open on the default directory C:\Documents and Settings\<windows login>\.
Type “set devmgr_show_nonpresent_devices=1” (without the quotes) press enter. It should just go to the next line.
Type “start devmgmt.msc” (without the quotes) then press enter. The Device Manager should open.
On the Device Manager
Click View from the menu bar.
Click Show Hidden Devices.
Look for categories, Palm OS Handheld, Other Devices and Universal Serial Bus Controllers.
Expand Palm OS Handheld (if available) and uninstall all PalmHandheld.
Right+Click on the PalmHandheld.
Click Uninstall.
Repeat Steps A and B until all PalmHandheld are Uninstalled.
Expand Other Devices (if available) and uninstall all Unknown Devices.
Right+Click on the Unknown Device.
Click Uninstall.
Repeat Steps A and B until all Unknown Devices are Uninstalled.
Expand Universal Serial Bus Controllers and uninstall all Unknown Devices.
Right+Click on the Unknown Device.
Click Uninstall.
Repeat Steps A and B until all Unknown Devices are Uninstalled.
Close the Device Manager.
Restart the Computer.
After Restart, wait for all the components to be loaded on the System Tray especially the Hotsync Manager.
Perform Hotsync.
Post relates to: Centro (Unlocked GSM)
Post relates to: Centro (Unlocked GSM)

USB Device Not Recognised - unable to connect

I am having a serious issue! My ipod was working perfectly, then for no reason i got the error message 'USB device not recognised' from my PC when plugged into a 2.0 port. I am unable to mount to restore to factory settings - definitely isn't a USB connection issue - I have tested the same port with my printer and it works perfectly! When I troubleshoot, The PC tells me that it is an unknown device, and that 'No drivers are installed for this device.' Where can I get Drivers for an IPOD 4th Gen?

This is a shocker! I've now tried the following:
- re-setting iPOD to factory settings
- re-formatting iPOD
- removing then re-installing Itunes, both old and new
version
- resetting the COM thingy
- re-installing iPODservice.exe
- deleting all systems drivers and re-installing
- re-setting iPOD whilst connected
- using old Ipod updater 2004-08-06 and the later 2004-11- 15 version
All I have now is an empty iPOD and a music library with 30gig of tunes within it, with no way of marrying the 2 together. It's been 2 months now and I've really got the hump!
I think that there is a serious defect with either the iPOD or the software - we are not isolated cases! (have you seen how many discussion strings there are on the same subject?)
If you manage to find any other possible fixes, please let us know! In the mean time, I'm off to see about getting one of those new Sony thingys!

USB device not recognized ... any help ?

Hey guys,
So i went to plug my iPhone 3G into my PC running Windows Vista and it comes up with the error message,
"USB Device Not Recognized
One of the USB devices attached to this computer has malfunctioned, and Windows does not recognize it."
Last time this happened I uninstalled the USB Root Hubs on my computer and when they reinstalled my iPhone connected, but it has happened again and this method no longer works.
I've tried restoring my phone, turning it on and off, i tried stopping my computer from turning off my USB ports but to no avail...its getting very frustrating because i can't sync my phone
ANY suggestions would be great PLEASEEEE!
Message was edited by: chris__robin

Try a different port and a different USB cable.

USB Device Not Recognized (&IPOD WILL NOT TURN ON)

I have had an iPod Shuffle G2 for 6 months now with no problems until today.
It went flat when I was at my friends place so when I got back to my mums I plugged it into my laptop and it told me "USB Device Not Recognized One of the USB devices attached to this computer has malfunctioned and windows does not recognize it" I thought there was just a prob with that port in my laptop, so I put it in the other one. So I though Ill wait until I get to my nan and pops and put it in there computer which is where I sync it. Same problem in both ports. Except on this computer the orange light is on but doesnt flash.
Now my iPod doesn't turn on at all..
Which is fantastic..
Help yeah?
My mum is gonna kill me.

thank you for you help so far. I am very frustrated with this thing. I have been trying to correct this problem for hours.
I will try to disable virus protection. but I will have to enable virus protection again. what should i do?

Usb device not recognized on shuffle

i have a belkin usb 2.0 device with 2 ports. it is plugged into my ibm thinkpad laptop. the mouse works fine in both ports -as does a photo scanner. but for some reason, the ipod shuffle is not recognized - i keep getting a green blinking lite and a message that says "usb device not recognized". funny, because the shuffle worked fine the other week when i installed all the software after purchase. i've updated windows software and reset the ipod. i've read elsewhere that some people have had the same problem - and that it was a malfunctioning usb port on the ipod shuffle. if so, what a piece of junk. maybe i just need to call tech support and ask for a new shuffle - i don't think that downloading the updater, etc. will help. any suggestions? thanks.

If it's working with other computers (using the same USB cable to connect the shuffle), then the problem is probably related to your computer.
If you connect something else to the same USB port (like a USB flash drive if you have one), does it work?
If you are using a USB hub to connect the shuffle, be sure to try a port that is directly on the computer. And try more than one port that is on the computer.
Also, it may be helpful to know some other details, such as type of computer (Windows or Mac) and the version of OS.
Since this is a laptop, if it has a main battery that can be removed, you may want to try disconnecting it from power and removing the battery. Leave it that way for a new minutes. Then, put the battery back, start it up, run iTunes first, and try the shuffle again. If there was a problem with your USB ports, that may correct it.

USB devices not mounting in one port?

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