iPhone repeatedly disconnects/reconnects

Discussion in 'iPhone Tips, Help and Troubleshooting' started by hitenders, Jun 15, 2008.

  1. macrumors newbie

    Joined:
    Jun 6, 2008
    #1
    Hello folks,

    I have this strange problem when I connect my iPhone to the PC. It seems to repeatedly disconnect/reconnect to the computer sometimes. At first, I thought it was the dock causing the problem, but it happens also when the USB cable is directly plugged into the iPhone.

    It started first on another USB hub which is not USB 2.0 supported, I shifted it to another USB port which in fact USB is 2.0 supported, everything was fine for a week then it started doing it on this port too, happened twice for a span of 5 seconds.

    I know nothing is wrong with the USB cable as this does not happen when I connect it to the wall dock.

    I've reinstalled iTunes but to no avail, I'm guessing it's my crappy PC.

    It's stopped happening on both the USB ports now but it concerns me since the last time it happened to me on the first USB port, I got an error which led to all the songs from my iTunes disappear.

    Any help or info on this will be greatly appreciated,

    Cheers.
     
  2. macrumors member

    Joined:
    Feb 12, 2008
    #2
    Same thing is happening to me on my macbook...

    I'm on my 4th iPhone.
     
  3. macrumors regular

    budfoot

    Joined:
    Jul 1, 2008
    Location:
    Boston, MA
    #3

    I don't think it's the phone. I can't use some external drives (aka, Time Machine backups) on the port that the iPhone went funky on now.

    Try other USB periphs, i'd bet you're having the same problem.

    iPhone seems to have fried at least 1 USB port on my system?
     
  4. macrumors regular

    budfoot

    Joined:
    Jul 1, 2008
    Location:
    Boston, MA
    #4
    Now that i've searched around some more, seems to have something to do with iPhone crashing the usb2.0 driver? I've a genius bar appt tomorrow night, so we'll see what happens.
     
  5. macrumors newbie

    Joined:
    Jul 19, 2008
    #5
    Any answers?

    Did anyone find a solution to this?
     
  6. macrumors regular

    budfoot

    Joined:
    Jul 1, 2008
    Location:
    Boston, MA
    #6
    Yes yes yes.

    It's push/3g. If you disable push, it stops. If you disable 3g, it stops.

    I took both my mac and the phone to the apple store on Boylston. Couldn't repro it. I finally realized i had turned off push, turned it back on, and the thing went nuts.

    They are wanting to replace the USB port. His reasoning was he plugged my phone into another MBP and it didn't do it (makes sense to me).

    So, i couldn't leave my MB, i had to go to Reading England, but when i get back, i'm going to drop it for a pro-care appt.
     
  7. macrumors regular

    Joined:
    Jun 29, 2007
    #7
    Any news on this? I disabled push, 3g, even went into airplane mode and nothing helped. I know it's not the cable because it worked fine on my old iphone.

    I've tried connecting it through my iMac keyboard, my usb hub, and directly into the computer... nothing works.
     
  8. macrumors regular

    budfoot

    Joined:
    Jul 1, 2008
    Location:
    Boston, MA
    #8
    Well, of sorts...

    I've been using my phone now for a couple months (has it been that long?)... i've noticed a few things..

    There are certain APPS that will cancel syncs, don't ask me how or which ones, but i've noticed that when i have restored my iphone to blank, it'll sync music and stuff all day. As soon as i start putting apps on it, it starts disconnecting/reconnecting.

    Also, i've been using the right USB port of my MBP, the one furthest away from the power jack. I have yet to have the time to drop my MBP off at the genius bar to have them replace the usb port on the left side.

    There is definitely something funky. And it's gotten downright intolerable since 2.0.2... we'll see if 2.1 fixes it.
     
  9. macrumors regular

    Joined:
    Jul 21, 2008
    #9
    My 3g started this after updating to iTunes 8. Device manager shows the iPhone as a imaging device which was fine. I'd drill down and reinstall the device usb driver and it would work.

    No longer does that anymore. The driver now says access denied.
     
  10. macrumors newbie

    Joined:
    Jun 21, 2009
    #10
    Hi Guys - just stumbled on this thread via Google and thought I would take the time out to offer you my solution:

    I had the same problem and thought it was a number of things (USB Port/IPhone/Cable/etc...) - however resetting my iphone didn't help and neither did restarting my PC.

    What you need to do is actually POWER DOWN your PC. Not just restart it. Actually switch it off! Then unplug it from the power socket and - whilst unplugged - hit the "on" button of your PC a few times within a good 30 seconds (i.e. give it a few secs or this might not work).
    The idea is that all the little bits of "leftover power" on your mainboard need to discharge.

    Having done that simply plug the PC back in, boot up, and all should be restored to normal.

    This trick OFTEN works when USB devices are playing up and I have no real idea why except for that it obviously has something to do with the wrong kind of electrical charge building up on the USB ports.

    I have never experienced it with laptops but with heaps of component-built PCs.

    Hope it helps - it worked for me and my iPhone 3G ...

    cheers
    monstabyte
     
  11. macrumors 601

    PNutts

    Joined:
    Jul 24, 2008
    Location:
    Pacific Northwest, US
    #11
    This happens whenever I use the same USB port as a slow (1.0) device, i.e., keyboard, keeping in mind it is difficult to know which exernal ports share the same internal hub (they are typically pairs).

    I solved the problem by unplugging all the USB devices I could, make sure the issue went away, and then plugged them back in one by one (and moving the iPhone when necessary).
     
  12. macrumors newbie

    Joined:
    Oct 15, 2011
    #12
    This worked for me!!

    I have an iPhone 4. This problem drove me nuts. Glad I found this post. Thanks budfoot.

     
  13. macrumors member

    Joined:
    Jan 8, 2012
    Location:
    Antwerp
    #13
    Sorry to be gravedigging.. But bumped on this thread while using google.

    I have 2x iPhone 4s, both same model (but way different manufacturing date).

    The first iPhone works perfectly fine.

    The second iPhone shows this disconnect/connect loop while hooking it up in both USB ports on my rMBP 13" haswell.

    Connecting the 'problem' iPhone to another computer doesn't give me this error, so I tried hooking it up to my rMBP again.

    Result: left side USB port still reproduces the error, now the right side USB works fine with the iPhone..

    Anyone got any idea whats actually going on?
     
  14. macrumors 6502

    Joined:
    Jun 3, 2003
    #14
    Bringing this one up again. Just replaced my iMac with a new iMac 5k and now have this issue now and again. Has anyone got a solution.
     
  15. macrumors newbie

    Joined:
    May 23, 2010
    #15
    Jailbroken iPad Air on 8.1.2 - Safemode Solves problem

    I just used Activator to assign a gesture for restart springboard in Safe Mode.

    After re-springing into Safe Mode the connect/disconnect stopped.
     
  16. macrumors newbie

    Joined:
    Dec 5, 2010
    #16
    Just discovered the same thing - was driving me nuts for months!

    MBP 15" Retina (late 2013), and whenever I'd connect my iPad to the left USB port, it would flip out on disconnects. My iPhone 5s would work just fine, though.

    Thing is, I have another MBP for work (same model) and it does the same thing.

    As soon as I switched the the right USB port, all was well.

    Methinks this was an Apple build problem....
     

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