Windows won't recognize Galaxy S2 at all

Question

I'm having an issue with my Galaxy S2. I typically leave it in Debug mode, up until a few days ago it has worked great. I've successfully loaded APK's for testing through eclipse previously.

I tried to load a prototype of a new app im working on and when I plugged in the S2 nothing happened, Windows didn't beep like usual and when I tried to view running devices it did not show up.

When I look at the device manager under universal serial bus controllers, it doesn't show any 'unknown devices'

I've tried reinstalling drivers through kies, and third party sources (as well as removing all drivers and letting windows install them again for me.

I've tried connecting as Mass Storage Device, with debug mode on and off.

I've restarted both my computer and phone many times.

When my phone is off and plugged in Windows will beep and say that a device was connected but not recognized (which is more then what I get when the phone is on)

And sometimes when I "troubleshoot connection issues" in Kies it will reinstall the drivers and after the process is complete windows will report "Drivers were not successfully installed"

I've tried plugging it into my Windows XP laptop and it will show up as "Unrecognized device" even after I installed Kies on the laptop, and tried the driver installation it with the same results.

Posting here is my last resort as I've spent close to 5 hours troubleshooting this issue, and searching for answers. My biggest concern is that when I do plug my phone in it will beep to say that it is charging, but windows 7 doesnt even see it!

I appreciate all suggestions & help!

EDIT: Also I installed the Samsung Android USB Driver for Windows and windows reports that the drivers were not successfully installed

Thanks Jon

Answer 1

Try to key in dialer:

*#7284#

It has 4 options:

UART

• MODEM
• PDA

USB

• MODEM
• PDA

In USB section, select the PDA. If it already selected to PDA then reselect it by selecting MODEM and then PDA again.

Only change the USB setting and then press back and try reconnect to kies again.

Hope it helps..

Answer 2

I had the same problem and JUST as i was about to give up, i realized that I had replaced my usb cord with a generic one from the store. I happened to still have the old one around still and that ended up being my issue -.-; Hope this helps someone else!