"Have you tried a hard reset? Or try to let the battery run out then try to plug it in (then again it might never turn on)"
Hard reset? What exactly is that?
If it is like Restore Mode, then yes.
The battery has not run down as yet, but it only happened today.
Oh, and just in case, I gently cleaned the docking port and checked it with a magnifying glass, but it was clean enough and showed no sign of dirt or anything.
"To reboot your phone press and hold the Home button and the Sleep button at the same time. Keep them held until you see the slider disappear and the the Apple logo show up. Then release both buttons."
Yes, I did that. I call that "Restore Mode".
However, it made no difference, and I get the same results (as listed above) when I connect my iPhone to computer or charger.
Come on, somebody has to know something! It's been a day or so since I last synced my phone to my mac and then tonight I get home and try and it won't work. When I put it on the charger next to my bed it charges fine but it will not sync to my computer. I hard reset the phone, I repaired disk permissions, I repaired the disk, I reset the USB ports AND reinstalled iTunes. ***?
OK - FIXED!
I uninstalled iTunes 8.
I installed and tried 7.7.1 - saw the iPhone, but I always got errors on restoring. So restore never actually completed. Not good and I seemed to be now stuck in DFU mode and/or restore mode (sometimes I got the black screen, sometimes the cable and disc)
Then tried 7.5 - saw the phone, but as mentioned above, by now phone was stuck in a sort of 'restore' sort of 'DFU' mode and I could not get it back to 'normal' nor get it to a true 'DFU' mode.
So restore would seem to work, but after the restore I always got an unknown error.
So then I found that ZiPhone 3 could force the phone into a 'good' DFU mode.
Finally I got a good DFU restore to 1.1.4
1) Keep uninstalling Apple Mobile Devices and iTunes, and installing versions, until you find a version that recognizes your iPhone is connected.
2) If your iPhone is, or is not, in a 'good' mode for restoring firmware try iLiberty+ and/or ZiPhone 3 and use their 'extras' options to force your iPhone into DFU mode (you may have to use their other options first, like 'Normal' and/or 'Restore' modes - I did)
Now I can contact Apple about replacing my iPhone due to the vertical gray line that has appeared in the touch screen above the LCD.
For Christs FU##$$ing sake, this is ridiculous. Since I have bought this bloody iPhone I have had nothing but bloody problems...I wish I bought a BlackBerry. In fact, anyone reading this....don't buy this piece of ****. First it was the droped calls or failed calls when ever I dialed a number, or a call came in it would get cut off. the it was the frozen screen...I couldn't get it to work all day. Now I get this USB device not recognized crap! Who the **** is running Apple now...Microsoft!!!??? I can't believe this ****.
And support closes at 9am....BS. I can't connect and there is no way I am going to uninstall iTunes v8 and try re oading different versions all day and night. This is ******** and makes me never want to buy another complex Apple product...stick with iPods... jujst the basic ones...not even the itouch that sounds liker ti is screwed up too. This is very frustrating...I have no clear simple way to fix this tonight, it is unacceptable and I have had enough with this ******* this. What's next?? How many more issues am I going to have with this thing...reliable? Reliabe, my ***.
I too was having this problem when trying to sync my iPhone 3G with my Windows Vista Ultimate 32bit.
This was quite frustrating, until I figured out a "work around". It's not pretty, but seems to work fairly reliably.
1) Vista on and ready.
2) Plug in cord to iPhone first
3) Turn on iPhone to home screen.
4) Plug in USB cord to Vista machine.
This is where I usually get the "USB Device Not Recognized" message.
5) unplug USB cord from Vista machine.
6) Open up control panel, go to System, Device Manager.
7) Click the + next to Universal Serial Bus controllers.
8) Right click the bottom most USB Root Hub (we'll try them all, but start from bottom).
9) Select Properties, Driver Tab, Uninstall.
At this point, Windows freaks out a bit, as it sees it's missing a USB Root Hub, and tries to reinstall it. After it pops up the message in your task bar that it's Found the USB Root Hub, give it a few seconds, and then goto step 3 above.
If this doesn't work with the bottom most USB Root Hub, try the next one, and keep trying plugging in and unplugging the iPhone after uninstalling different USB root hubs. It should work eventually.
I've never tried just uninstalling them all at once, and then plugging in the iPhone. This might work as well, and could be faster.
I also wonder if I see this error more, because I'm trying to plug my iPhone into a USB 1.1 port on my computer. Not sure, haven't tried USB 2.0 yet.
Xykon ... THANK YOU!
haha I've been searching google for hours trying to find a solution to my iPhone not being recognized by Vista ... going through all this advanced stuff and changing file names .. then i tried what you just said and perfect ... thank god i didn't go and restore my entire phone =]