Big problem. Suddenly my phone will not turn on. Sits at the white Galaxy S GT-I9000 screen and does not boot. When I put it into download mode and plug it into computer, its suddenly saying "USB Device Not Recognized".
What do I do? PC won't recognize it, it wont boot. can't flash it.....I'm freaking out here...
Did you flash anything to it or root it?
riwarren said:
Big problem. Suddenly my phone will not turn on. Sits at the white Galaxy S GT-I9000 screen and does not boot. When I put it into download mode and plug it into computer, its suddenly saying "USB Device Not Recognized".
What do I do? PC won't recognize it, it wont boot. can't flash it.....I'm freaking out here...
Click to expand...
Click to collapse
Hi Rick. Try to re-install samsung usb drivers. during this time, take out the battery from the phone. once finished installing the drivers, put back the battery into the phone. Go into downloading mode. Fire up odin, put in the necessary firmwares + pit files. Once done, then CONNECT your phone to the usb port of your computer.
Hope it's okay.
Edit: Let's hope that it is the computer usb drivers are corrupted. Alterntively, if you still can't do it, try it on another pc.
Nope. I was rebooting it to flash XXJPC to it, but couldnt do so because it was saying that USB message and wouldnt detect it. So I went into recovery, did a factory reset, and now it wont boot.
Another computer does the same thing *tears*
*BUMP*
Lets try a different route. I will pay a generous sum of money to anyone who offers to and does manage to fix this for me?
rick, looking at this, if your usb is not recognised, it is either the pc or the phone usb port might be damaged.
if it is a hardware issue, then use the bounty to get it fix.
I was at that same point with my vibrant. After failed attempts of getting into download mode using buttons, here's what I did.
Download and install samsung usb drivers and android sdk.
Plug into the computer and use adb to get into download mode (adb reboot download).
Then flash with odin.
Doing that worked for me when nothing else would. Try it ?
Sent from my SGH-T959 using XDA App
richan90 said:
I was at that same point with my vibrant. After failed attempts of getting into download mode using buttons, here's what I did.
Download and install samsung usb drivers and android sdk.
Plug into the computer and use adb to get into download mode (adb reboot download).
Then flash with odin.
Doing that worked for me when nothing else would. Try it ?
Sent from my SGH-T959 using XDA App
Click to expand...
Click to collapse
I can get into download mode just fine.....my pc just doesnt recognize the usb device. tried 3 differente pc's, 2 running win7 and one running xp.
Did you install usb drivers on each of the machines?
Sent from my GT-I9000 using Tapatalk
I installed the samsung USB driver executable. and I also tried to use those drivers that it installs to manually update the "unknown USB device" in device manager, but they won't take.
Try uninstalling all drivers, then stick a MicroSD in your phone before plugging it into the usb.
Assuming you have Samsung Kies in your PC, try to upgrade it at 1.5.1.10074_45.
How long do you wait the boot?? The first boot after flash is very long, wait at least 5 minutes with flashing "S".
I did not just flash anything. My phone got really hot and laggy (as I was using it while charging it via USB port) and so I rebooted phone in an attempt to resolve the lag. when I did, it would not go past the WHITE Samsung Galaxy S I9000 screen, does not get to the flashing S screen.
bump
please anyone able to help?
riwarren said:
bump
please anyone able to help?
Click to expand...
Click to collapse
if i understood you correctly, you have two separate problems:
a) your phone does not boot up
b) your phone is not recognized by any computer when plugged in
could be a coincidence, but probably is not. i'm guessing your bootloader got screwed up somehow. if it is a coincidence, it could be that your usb port on the phone is effed, or your usb cable is dead. try first using a different cable and see if your phone can be recognized by any computer. perhaps then you can go into download mode and reflash.
also, have a look at this post, might help you (although, if your usb is effed, there's not much point in trying any solution that involves your phone being connected to a computer): http://androidforums.com/780720-post3.html
EDIT: also, have your tried the obvious stuff, like pulling battery?
I ve seen many threads with the white screen problem ... it has in most cases been the drivers ... you desinstall all drivers from pc using Kies option for resinstall the drivers ... then you pull the battery off few sec (give it a min or two) then you get to download mode and you flash the beast ... dont connect your phone before launching odin or else it will not be recognized ...
for the few other people who didn't manage to fix it ... it was a hardware failure
That post you linked, is worth a try. But its for a motorola.....Where do I get my SGS bootloader to use instead?
ohh you were implying to try to use the motorola usb drivers?
bouzoubaa said:
I ve seen many threads with the white screen problem ... it has in most cases been the drivers ... you desinstall all drivers from pc using Kies option for resinstall the drivers ... then you pull the battery off few sec (give it a min or two) then you get to download mode and you flash the beast ... dont connect your phone before launching odin or else it will not be recognized ...
for the few other people who didn't manage to fix it ... it was a hardware failure
Click to expand...
Click to collapse
I never said anything about a white screen. and I am not uneducated on flashing SGS, or using Odin. Far from it. My phone was first showing USB symbol when it wasnt plugged into USB port, then phone started running really hot while charging and got really bloated like it was overheating. So I rebooted and its now force closing at the first boot animation. I can get into download mode and recovery, but will not recognize in any of the 3 computers all running different versions of windows on them, with either of my USB cables that I tried.
Related
Hello all, I am turning to the Forums since I have spent 5 hours trying to resolve my problem.
Earlier today I installed Kies Mini on my computer in anticipation of the official AT&T Froyo. However, now my computer no longer recognizes my phone at all. It does not show up in the Device Manager, or anywhere.
I tried Uninstalling Kies Mini, Uninstalling the Drivers, Rebooting my phone. etc, etc. But Windows still will not recognize the phone as attached. It worked in the past and I would like for it to work again.
I am currently running Windows 7 64 bit. My Captivate is running Cog 3.4.
Try this:
Uninstall Kies Mini and all Drivers
Reinstall Kies Mini
Once installed turn on USB debugging on your phone and then plug it in, let it install all of the drivers.
Unplug your phone and shut it down
Once shut down activate download mode (hold up and down volume and plug in the USB) again it will install more drivers.
Once this is done unplug your phone, remove the battery and turn it back on, then restart your computer.
Uninstalled Kies Mini, and Samsung Drivers. Reboot
Installed Kies Mini.
Attached Phone to Computer. Nothing.
Also, Tried to Just boot my phone into Recovery Mode. But only boots into Clockwork Recovery. Can't Log into Stock Recovery
Update: Tried hooking up the phone to my XP machine. No Joy. XP did not recognize the device or try to install drivers.
Did you enable debugging?
Sent from my SAMSUNG-SGH-I897 using XDA App
Yes, I placed it in Debug mode. When I plug in my Phone my Title Bar Shows the USB Debugging Android indicating that USB Debugging connected, the USB icon that says Copy files to From Computer. If I click on USB, it gives me the Green Connect Android, then the Orange One. But none of my computers recognize a USB device as connected.
I have tried it with Three different cables. I'm thinking that somehow the phone is not sending some message to Windows saying "Hey, I'm connected"
Did you use the correct drivers for the phone? Can't recall of the top of my head if I can use the standard captivate drivers for windows if your on cognition..
Sent from my SAMSUNG-SGH-I897 using XDA App
I am having this exact same issue - only I updated from JH7 to Official 2.2 (for ****s n giggles) and now pc no longer recognizes phone. Went through the uninstall and reinstall and reboot.... no luck. I've never had this issue before...... ever.
I have tried almost everything i can think of. Anyone have any suggestions?
Sent from my SAMSUNG-SGH-I897 using XDA App
Not in device manager
I have what appears to be a soft brick. I was running the i9000 drivers. I was trying to install the i897. At first Odin recognized my phone and I began to download. The Odin bootloader flash failed. No my computer (Win 7 64 bit) does not even see my phone. Nothing in device manager, not even an unrecognized device.
I can get my phone into download mode. Does anyone have an idea how I can get windows to see me again?
From my experience as long as you are in download mode and have odin opened up it when you connect it, odin should find the phone no problem for you to be able to flash something new to it.
davncari said:
I have what appears to be a soft brick. I was running the i9000 drivers. I was trying to install the i897. At first Odin recognized my phone and I began to download. The Odin bootloader flash failed. No my computer (Win 7 64 bit) does not even see my phone. Nothing in device manager, not even an unrecognized device.
I can get my phone into download mode. Does anyone have an idea how I can get windows to see me again?
Click to expand...
Click to collapse
Have you rebooted the PC? Try to reinstall the drivers again. I had to reinstall the nexus s drivers but I have read some need to reinstall kies to get the drivers to work. Just keep at it. Try other USB ports. My phone wouldn't be recognized for about two weeks with trying everything. I tried new USB cables, drivers and all. Then finally it kind of worked and I went from download mode with a jig to phone!PC and then it took another reboot of the laptop and phone was able to get flashed again via the phone!PC screen. Just keep trying is all I can say.
Sent from My KickAss Captivated CM7 OC'd 1.5Ghz/Undervolted
Ive got my phone into a boot loop state because I messed up when trying to restore a previous backup of CM7 that I had.
Okay I thought, this is not a problem I will just do a clean flash of something via odin with my phone in download mode. This is where the problem lays. Odin can not see my phone when its in download mode and plugged in via USB! I have flash roms via Odin before so know what I'm doing.
I've tried it on 2 windows 7 64bit laptops and different USB ports but both are the same! could this be a driver issue? I have Kies installed on both and have manually tried installing the driver too.
Other things to note is that I can't get into recovery mode but no problem getting into download. Also when I plug the phone into charge it doesnt come up with the battery symbol but only the circle of rectangles like it is loading the battery symbol which never appears.
Anyone know what is going on?
Sorry for bad english.
I had problem like yours - pc don't recognized my phone (odin too) and shows only battery charge. i tried on 3 different pc's, installed kies, pc studio, drv, tried 2 differnt cables.
And the problem was... Cables
Sent from my GT-I9000 using XDA App
Deck6rd said:
Ive got my phone into a boot loop state because I messed up when trying to restore a previous backup of CM7 that I had.
Okay I thought, this is not a problem I will just do a clean flash of something via odin with my phone in download mode. This is where the problem lays. Odin can not see my phone when its in download mode and plugged in via USB! I have flash roms via Odin before so know what I'm doing.
I've tried it on 2 windows 7 64bit laptops and different USB ports but both are the same! could this be a driver issue? I have Kies installed on both and have manually tried installing the driver too.
Other things to note is that I can't get into recovery mode but no problem getting into download. Also when I plug the phone into charge it doesnt come up with the battery symbol but only the circle of rectangles like it is loading the battery symbol which never appears.
Anyone know what is going on?
Click to expand...
Click to collapse
If you are CM7, you may need Nexus S Drivers.
See this link
http://forum.xda-developers.com/showthread.php?t=1061946&page=879
Download and extract to folder.
When phone connected, locate it in your computers devive manager and update driver and point to your folder where you extracted for installation.
Thanks spaikas!
I guess I will have to go out and buy a new cable to try that. One thing though is that even when I plug it into the mains power adaptor I still get the circle of rectangles as well as when its plugged into my PC (with the supposedly defective cable). So does this suggest that the circle of rectangles is not caused by a bad cable? but still my cable being bad could be a culprit for odin not seeing it.
chablo12 said:
If you are CM7, you may need Nexus S Drivers.
See this link
http://forum.xda-developers.com/showthread.php?t=1061946&page=879
Download and extract to folder.
When phone connected, locate it in your computers devive manager and update driver and point to your folder where you extracted for installation.
Click to expand...
Click to collapse
Thanks. I have downloaded and extracted the driver. But I can't find my phone in device manager. Does the phone have to be in download mode for windows to be able to see it. Do you know roughly what it would be called?
Deck6rd said:
Thanks. I have downloaded and extracted the driver. But I can't find my phone in device manager. Does the phone have to be in download mode for windows to be able to see it. Do you know roughly what it would be called?
Click to expand...
Click to collapse
No, actually enable USB debugging and go into CWM recovery and connect, mine was showing as Samsung Galalxy S or Android phone. Check in USB devices as well.
chablo12 said:
No, actually enable USB debugging and go into CWM recovery and connect, mine was showing as Samsung Galalxy S or Android phone. Check in USB devices as well.
Click to expand...
Click to collapse
I can't get into CWM! Is there no way to install the Nexus S driver without having the phone plugged in because otherwise I have no idea what I'm going to do....
It was my cable! Sorry for wasting your time guys but it was just a very unlucky coincidence that my cable must of broke at the same time that I messed up my phone and needed to do a odin flash! Anyway managed to get my hands on another cable and now odin can see my phone!
) congratulations!
i was so happy too, when i pluged 3rd cable, and found it good
Sent from my GT-I9000 using XDA App
Hello, my Samsung Galaxy S GT-i9003 was working fine yesterday, but now it stays stuck on the samsung logo when booting. I'm trying to flash it, the thing is, I can't get my computer to detect my phone, it shows up as an unkown device. I tried a factory reboot etc.. didn't work, and I can't even use it as a mass storage device since it's bricked. I used all the newest drivers, the newest version of kies but it still doesn't work.
I'm on windows 7/64 bit btw.
Thank you in advance.
Are you able to enter into download mode? (hold volume down + home + power)
If not, You can try to make (or buy) a JIG which will force download mode and you can flash a new ROM with Odin
Regards
I can enter in download mode, the thing is, my computer detects my phone as an "unknown device" and it isn't recognised by Odin either, which means I can't flash it.
are you sure the drivers are installed correctly? I recently had problems with the USB cable.. try another one and if possible, other PC....
I installed many times the drivers, using kies or without kies, the result is just the same, maybe it's the cable.
Try to change the cable and the USB port. Last week I tried to update a Motorola Atrix and the same thing happened, unknown device. Then I changed the USB Cable and voila... worked !
Let me know if it works....
Regards
just wondering if you have resolved this yet ? I have same problem tried all usb drivers i can find , 5 different computers , jig , odin still not detect and windows show unknown device detected.
Sent from my Dell Streak using XDA
Guys I had the same problem. After trying many pc, drivers, cables combinations I came to a conclusion that the usb port on the phone itself must be damaged. After taking a close look, I saw some of the gold contacts damaged/missing.. That might be the case with your phone aswell. Look at the pins and if yo usee some visual damage you know what the problem is. Even if you dont see it, it still might be a problem.
Okay.
I bought a Samsung Captivate from a company on Amazon a few weeks ago, and it started having the problem with the speaker cutting out. I took it apart to try the two fixed I'd googled - loosening the speaker screw and reseating the speaker ribbon - and neither worked, and now the speaker is completely dead. That isn't my biggest problem, though.
Somehow in the process of the above, I did something that made it so that the phone will only boot into download mode. I can hold down the power and volume buttons and get it to reboot, but it only reboots into download mode again, and won't recognize in windows via the USB cable. It did recognize once, and I used Odin3 to get it back to a factory reset image (it was running stock firmware, but I'd rooted it to remove the AT&T apps) thinking in vain that it might help, but it still only boots into download mode.
But there's the weird thing: It won't power off in download mode unless I pull the battery out, but if I put it back in then plug in the USB cable while holding both volume buttons, it boots right into android, no problem. Everything's fine except the speaker still doesn't work, it doesn't show to be charging while plugged into the USB cable, and still won't recognize the USB in Windows. But if I turn the phone off and back on, I'm back in non-recognizing download mode again.
Everything otherwise works fine once I get it into android, I can even tell it to erase all settings and factory reset, and it reboots itself, re-flashes to stock, and works fine until I power off and back on, then back to download mode.
So I guess the question is oh god what have I done?
Freud,
I too am having this issue with my roommate's phone. The only way I can get it to boot is if I perform a restore using a Odin3 image. However once it's turned off it only boots into download mode. I nor the roommate have opened the phone. It just one day decided to keep booting into download mode.
Any asistance in this matter would be appreciated! Thank you.
zeyoner said:
Freud,
I too am having this issue with my roommate's phone. The only way I can get it to boot is if I perform a restore using a Odin3 image. However once it's turned off it only boots into download mode. I nor the roommate have opened the phone. It just one day decided to keep booting into download mode.
Any asistance in this matter would be appreciated! Thank you.
Click to expand...
Click to collapse
i have the same problem! the only way to boot my sgs is to flash a stock rom with odin. and every time i turn off the phone then it reboots in download mode!! someone has a fix? i need help!!! thanks
Pink Freud said:
Okay.
I bought a Samsung Captivate from a company on Amazon a few weeks ago, and it started having the problem with the speaker cutting out. I took it apart to try the two fixed I'd googled - loosening the speaker screw and reseating the speaker ribbon - and neither worked, and now the speaker is completely dead. That isn't my biggest problem, though.
Somehow in the process of the above, I did something that made it so that the phone will only boot into download mode. I can hold down the power and volume buttons and get it to reboot, but it only reboots into download mode again, and won't recognize in windows via the USB cable. It did recognize once, and I used Odin3 to get it back to a factory reset image (it was running stock firmware, but I'd rooted it to remove the AT&T apps) thinking in vain that it might help, but it still only boots into download mode.
But there's the weird thing: It won't power off in download mode unless I pull the battery out, but if I put it back in then plug in the USB cable while holding both volume buttons, it boots right into android, no problem. Everything's fine except the speaker still doesn't work, it doesn't show to be charging while plugged into the USB cable, and still won't recognize the USB in Windows. But if I turn the phone off and back on, I'm back in non-recognizing download mode again.
Everything otherwise works fine once I get it into android, I can even tell it to erase all settings and factory reset, and it reboots itself, re-flashes to stock, and works fine until I power off and back on, then back to download mode.
So I guess the question is oh god what have I done?
Click to expand...
Click to collapse
I can only offer a solution to the windows connection issue, once the phone is connected to pc, go into device manager and uninstall drivers for whatever it sees, unplug phone then plug back in and windows should reinstall drivers. Worked for me, odin wouldnt see phone . GL
This will solve your speaker issue
http://www.ebay.com/sch/i.html?_trksid=p5197.m570.l1311&_nkw=samsung+i897+speaker&_sacat=0
And this should solve your download mode issue
http://forum.xda-developers.com/showthread.php?t=1300843
I'm having a similar issue where my PC does not recognize the device. Right now I have no ROM installed, I have Devil Recovery, and I can only boot into recovery and Download Mode. However 2 different PC's will not recognize the phone. I've tried multiple cables and one PC was Windows 8, one was Windows Vista. Both had the most recent drivers installed. Nothing works....any clue? I can't mount the /sdcard or USB Storage while in recovery because the PC doesn't pick up the phone. The internal storage doesn't have a ROM or kernel to flash on it neither so I cannot flash anything. I have a captivate that has Devil Recovery and can boot into download mode but will computers will not recognize the device, drivers installed or not.
Jonnyredcorn said:
I'm having a similar issue where my PC does not recognize the device. Right now I have no ROM installed, I have Devil Recovery, and I can only boot into recovery and Download Mode. However 2 different PC's will not recognize the phone. I've tried multiple cables and one PC was Windows 8, one was Windows Vista. Both had the most recent drivers installed. Nothing works....any clue? I can't mount the /sdcard or USB Storage while in recovery because the PC doesn't pick up the phone. The internal storage doesn't have a ROM or kernel to flash on it neither so I cannot flash anything. I have a captivate that has Devil Recovery and can boot into download mode but will computers will not recognize the device, drivers installed or not.
Click to expand...
Click to collapse
Have you tried to uninstall the current drivers, reboot pc and reinstall them?
Also, it could be devil kernel that is faulty. If Odin can recognize the phone, you could flash a different kernel. Or even flash stock KK4, then corn kernel and finally, the ROM you wanna flash through recovery.
I just cannot get the PC to recognize the phone at all, even in download mode. I've tried 2 pc's and multiple USB cables, samsung, non-samsung, motorola, universial. Nothing, just says USB cannot recognize this device. Reinstalled drivers on 2 pc's and rebooted several times. I am lost, I know I'm not bricked because I can access download mode and recovery. I do not have a ROM on my internal card so I can't flash a ROM and can't mount my phone to my PC. No clue what to do.
---------- Post added at 02:59 PM ---------- Previous post was at 02:10 PM ----------
I just need my PC to recognize my device and I'd be good, odin would then recognize my device in download mode and I could flash a different kernel or rom.
Try cleaning out the micro usb port of ur phone. Maybe the contacts are not making good contact.
Sent from my SAMSUNG-SGH-I777 using xda premium
Any recomendations for what to use to clean it out? I have q-tips, any special solution to use or just the q-tip?
Rubbing alcohol should do.
Sent from my SAMSUNG-SGH-I777 using xda premium
Still no luck...I got my PC at work to recognize the phone ONCE. It went through and recognized it like it normally would, however it wouldn't recognize it again. I've been trying on my PC at home all last night and all morning and still no go. It won't recognize it. Now one thing I thought about is that I am on Windows 8. The PC at work that recognized it was Windows Vista. I don't know if that has anything to do with it. I wouldn't care so much if I didn't just sell it for $150 I just wanted to give the person a more updated ROM and ended up screwing something up when flashing the ROM.
Jonnyredcorn said:
Still no luck...I got my PC at work to recognize the phone ONCE. It went through and recognized it like it normally would, however it wouldn't recognize it again. I've been trying on my PC at home all last night and all morning and still no go. It won't recognize it. Now one thing I thought about is that I am on Windows 8. The PC at work that recognized it was Windows Vista. I don't know if that has anything to do with it. I wouldn't care so much if I didn't just sell it for $150 I just wanted to give the person a more updated ROM and ended up screwing something up when flashing the ROM.
Click to expand...
Click to collapse
Ok so I know you've uninstalled and reinstalled drivers several time. But what drivers are you using and when you plug the phone into your pc what is it showing as in the device manager?
They may be exactly what you are using but I added some drivers to this post you might want to try. Just unzip then through device manager update the drivers for your device manually and point it to that folder.
I added these drivers because I'm on Win8 as well and I noticed when I was in recovery that my phone wasn't showing up correctly in the device manager. After installing these drivers it was.
Thanks I'll try that when I get home, I am using the most recent drivers on the Samsung website for the Captivate.
So I got it to boot and be recognized by my computer and I used a 1 click method with CWM and it passed so the Odin flash. So no I basically have a on rooted captivate running 2.5 gingerbread and it is totally sellablebel now. I have no idea what caused my computer to recognize it I didn't even try your drivers yet, but thanks for trying to help.
Sent from my Nexus 10 using Tapatalk 2
Well whatever happened I'm glad you got it up and running.
Sent from my SGH-I897 using xda app-developers app
Hi everyone, I have the same problem as shown below, my phone is stuck in lg logo bootloop and the only thing i can do is enter in download mode, no recovery mode, no normal mode, etc. but my usb isn't recognized in windows nor in linux, i've tried 3 different cables and 4 diferent pc's and nothing. could this be a physical problem? i did the steps below.
what i did:
1-uninstalled kies and installed again
2- installed driver again
3-tried on other PC
4-re installed windows seven on laptop
5-changed cable
6-formatted my sgs 2 times
7-usb debugging and other types of connection does not work.
8 - then flashed with mobile odin and it failed creating a bootloop.
NOT ALL DONE ABOVE WORKED
PLEASE HELP ME
bonethugs said:
PLEASE HELP ME
Click to expand...
Click to collapse
run through the MY Android Solutions link below, have listed all your options therein
thanks but it doesn't work for me, i think it's a usb connector pin problem or something, but i'm afraid of buying one and brake the phone soldering the connector.... any other option to check if the connector is broken?
thanks.
Do you can go to the download mode? Try with odin on PC.
Sent from my GT-I9000 using xda app-developers app
vinogradska5a said:
Do you can go to the download mode? Try with odin on PC.
Sent from my GT-I9000 using xda app-developers app
Click to expand...
Click to collapse
Yes. I can go to download mode but my phone is not recognized in 3 different computers i've tried. I also have tried in linux and with dofferent cable
bonethugs said:
Yes. I can go to download mode but my phone is not recognized in 3 different computers i've tried. I also have tried in linux and with dofferent cable
Click to expand...
Click to collapse
I understand but sometimes you can't connect whit PC but whit Odin its doing. (Sometimes)
Start Odin with Windows and try it.
Very important - your phone must bee on the DOWNLOAD MODE. If its not doing your USB Connector on the phone its defect.
I have same problem having 6 months ago.
Sent from my GT-I9000 using xda app-developers app
Are your drivers installed? Install those, connect the phone so the pc to recognize the phone and begin install of drivers for it. When you plug in the cable be sure to be in download mode, you need the mtp driver to be installed. Remove the fone when it finishes.
After you install the drivers open odin add the files and only after plugin the phone in download mode. It should be ok then.
MobileFirmware.com rep and SGS user
It's not driver problem. I've flashed with odin and heimdall a lotof times. The phone failed to recognized time ago but when rebooting aleays solved thw problem, not this time.i get error code 43. If i force driver install i get error code 10 in device manager
Try to remove the drivers first. After that close the pc, remove the power cord and hit the on button. It will discharhe any charge left in your sistem (it will reset your usbs). Plugin the cord, open the pc normaly and then reinstall the drivers.
Put the phone in dld mode and see what happens.
Hope u resolve ur problem this way.
MobileFirmware.com rep and SGS user