[Q] Windows Not Recognizing Device - Galaxy S II Q&A, Help & Troubleshooting

Hi guys, was having a few problems with my phone and decided that I'd flash the stock ROM again.
Went into ODIN as you do, and as I was flashing the stock ROM, for some reason or another I heard the disconnect/reconnect noise that Windows makes when you remove a device then FAIL came up in ODIN.
Now my phone's stuck with a phone connecting to a computer on the charge screen, it can't go into recovery mode but it can go into download mode.
Tried connecting it to my PC in download mode, and even though I've got the Samsung USB Drivers installed I get the 'USB Device Not Recognized' message, which means I can't flash the stock ROM in ODIN anymore.
Does anyone have any advice? Thank you.

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JoshS2 said:
Hi guys, was having a few problems with my phone and decided that I'd flash the stock ROM again.
Went into ODIN as you do, and as I was flashing the stock ROM, for some reason or another I heard the disconnect/reconnect noise that Windows makes when you remove a device then FAIL came up in ODIN.
Now my phone's stuck with a phone connecting to a computer on the charge screen, it can't go into recovery mode but it can go into download mode.
Tried connecting it to my PC in download mode, and even though I've got the Samsung USB Drivers installed I get the 'USB Device Not Recognized' message, which means I can't flash the stock ROM in ODIN anymore.
Does anyone have any advice? Thank you.
Click to expand...
Click to collapse
Try installing samsung kies. The usb drivers are included.

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princeownt said:
Try installing samsung kies. The usb drivers are included.
Click to expand...
Click to collapse
I have it installed, and I installed the USB drivers from the soft bricked sticky in this section. Neither have helped.

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Hi!
Hi, you guys install ADB on your system? And also USB debugging mode on the phone?
Should be turned on which can be done by going to Settings>Applications>Development and select USB debugging.
Try this, for me its works

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MafiaDroid said:
Hi, you guys install ADB on your system? And also USB debugging mode on the phone?
Should be turned on which can be done by going to Settings>Applications>Development and select USB debugging.
Try this, for me its works
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Click to collapse
I can't even turn the phone on at the moment. Only thing I can do is go into Download mode.

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Help
Try this, take out the battery, then press and hold the ON button for 7-10 seconds (the longer the better). Reinsert the battery, then press ON button to start it. This is a soft reset, and wipes the temporary memory and empties all remaining power in the circuits. This helps on many phones and even laptops that won't start properly or show anything on screen.
If this does not work, try the next step. Again, do as above. But after inserting the battery, do not turn the phone on, but press and hold the ON button and the HOME button at the same time for 7-10 seconds. This is a hard reset, and works best if done after a soft reset. Just be sure the battery has at least some juice in it and isn't empty. If possible, try with another battery if this does not work.
Hope this helps!

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Try going to device manager, you will probably find your device as an unrecognized device, uninstall the drivers, unplug and then plug it again and see.

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if the prblm is hard then do a fresh installation of kies,device etec etc.....but if u have ur device in the device list on pc then first uninstall it...if possible try recovery mode and reset...

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I tried everything you guys have suggested and none of that worked. Anyone else got any ideas?

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Try everything (and I mean everything) on the following list. Given the problems you've had & that you've already tried some of these things, I'd try another PC. And if it doesn't work first go on another PC, then go thru the list & try everything on the 2nd PC.
*Ensure Kies & it's processes aren't running in Windoze task manager. Kill them if they are.
*Try different USB ports; you must be using a 'powered' or mainboard port.
*Try different USB cables (particularly the cable that came with the phone if you're not using it now)
*Try different versions of Odin (search on here/Google)
*Uninstall Kies, reboot, redownload & reinstall it, reboot, try the flash again. Also run Windoze Update.
*And if all this fails, try a different PC.

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Tried all the above and a different PC.
It didn't work. I could fix the phone if the computer would pick up that the phone's connected - it just doesn't.

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Total Removal of KIES including registry entries .
Reboot PC install a new copy of Kies .
Phone backup data and factory reset .
Set phone to USB storage mode using the Samsung cable connect to PC and wait for Windows to find USB drivers .Remove cable reboot phone .
Start Kies connect with cable wait for Kies to find the phone .
Note USB Debugging OFF and cable connects to a direct motherboard port only .
Nothing then only further suggestion would be to Format the PC and start over with a clean Windows install .
jje

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I can't turn the phone on, it's stuck on the phone, triangle, PC screen.
I've tried fresh installs on three different PC's.

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JoshS2 said:
I can't turn the phone on, it's stuck on the phone, triangle, PC screen.
I've tried fresh installs on three different PC's.
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Click to collapse
That's a forced download mode.
Try a blind flash to a stock firmware from Odin while connected to your computer with the phone on this screen. Even if Odin doesn't seem to register that it's connected. I've heard of at least one person this worked for.
At this point, you really have nothing to lose by trying this.

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Bit of an update, I plugged it in again and it installed some drivers and ODIN picked it up. Only for it to disconnect a few moments later, now it keeps disconnecting and reconnecting over and over but ODIN's not picking it up.

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JoshS2 said:
Bit of an update, I plugged it in again and it installed some drivers and ODIN picked it up. Only for it to disconnect a few moments later, now it keeps disconnecting and reconnecting over and over but ODIN's not picking it up.
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Click to collapse
I know you said you tried a different cable, but that sounds suspiciously like a bad cable.

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It's not the cable, thanks any way.
Update 2: I managed to get it to connect long enough to flash the stock Kernel. Still didn't reboot. Then I connected it again and flashed the stock ROM, which bricked it again. Then I flashed the stock kernel and it works!
However, there is a problem:
When the phone gets turned off, it constantly shows the charging battery icon with warning triangle and a thermostat next to it. I can't turn the phone on because of this unless I go into Recovery mode and reboot system.
Any ideas? Thanks.

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JoshS2 said:
It's not the cable, thanks any way.
Update 2: I managed to get it to connect long enough to flash the stock Kernel. Still didn't reboot. Then I connected it again and flashed the stock ROM, which bricked it again. Then I flashed the stock kernel and it works!
However, there is a problem:
When the phone gets turned off, it constantly shows the charging battery icon with warning triangle and a thermostat next to it. I can't turn the phone on because of this unless I go into Recovery mode and reboot system.
Any ideas? Thanks.
Click to expand...
Click to collapse
Now this sounds like a faulty/dirty/bad usb port.

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ctomgee said:
Now this sounds like a faulty/dirty/bad usb port.
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Click to collapse
This was my original thought and my reasoning for flashing a stock ROM in the first place!

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JoshS2 said:
This was my original thought and my reasoning for flashing a stock ROM in the first place!
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Click to collapse
I in no way recommend this, and not sure I would do it if I ever started having this issue...
BUT - I have heard that some people faced with this condition have fixed it by physically moving the small wafer board inside the USB port with a precision screwdriver (gently!) to a more "centered" position.
If that doesn't work, look at replacing that part. Either via warranty service if you still have it, or a service center.