Help!! Nexus S stuck in Downloading...

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Hey guys, so I just came across a Nexus S GT-i9020T but it has a problem! The problem is right after it's turned on, it immediately goes into "Downloading... Do not turn of target!!!" with an android sweeping up icon... Now I just bought this off a guy and he only told me that the last thing he did was install some Cybermod 9 skank mod??? he claims the phone was working fine until he went to reboot and got this Downloading.. screen from there on out.. Now I can't even get the phone recognized on my Windows 7 computer but I'm really new to this stuff and thought if i could get this fixed i'd have a cheap new/used Nexus S.. I've tried the Volume Up + Power hold, and other variants and cannot get the phone into bootloader. Also, when I plug in the USB cable there's no charging icons, and it seems the battery is getting low and dying so I'm going to buy an external battery charger to keep it topped up while I try to repair it. Please tell me what I can try to get this thing working! Thank you!

Originally Posted by r3ap3r911

Hey guys, so I just came across a Nexus S GT-i9020T but it has a problem! The problem is right after it's turned on, it immediately goes into "Downloading... Do not turn of target!!!" with an android sweeping up icon... Now I just bought this off a guy and he only told me that the last thing he did was install some Cybermod 9 skank mod??? he claims the phone was working fine until he went to reboot and got this Downloading.. screen from there on out.. Now I can't even get the phone recognized on my Windows 7 computer but I'm really new to this stuff and thought if i could get this fixed i'd have a cheap new/used Nexus S.. I've tried the Volume Up + Power hold, and other variants and cannot get the phone into bootloader. Also, when I plug in the USB cable there's no charging icons, and it seems the battery is getting low and dying so I'm going to buy an external battery charger to keep it topped up while I try to repair it. Please tell me what I can try to get this thing working! Thank you!

check if the volume down is stuck. power button + volume down get you into download mode.

Not quite sure how to tell if the volume down button is stuck... I can hear it clicking when i push it.. Hitting around the volume button area doesnt seem to do anything.. Any key combo I hold always brings me into "Downloading.."
Edit: I opened up the phone and the volume keys seem to be working fine

Do you have the Android SDK? I'd think if you got those, you'd be able to issue the ADB commands and reboot into the bootloader that way.

Yes i have the Android SDK installed properly, however i'm not sure if i have the correct USB Drivers since i just got this phone and havent ever hooked it up to my PC before.. I've worked on my Galaxy S and Galaxy Nexus before, but i've since updated USB drivers to 1.4.8..... I tried 'adb devices' in a terminal and can't get the PC to recognize the phone at all, but thats about all i know for commands. What else can I try??

ok so i found a list of commands, tried 'adb reboot-bootloader' but its saying error: device not found... Now my battery is almost completely dead and phone only comes on for 3-4 seconds so i think i need to go buy that external battery charger before i continue because the phone will NOT charge via usb cable attached to phone..

I haven't updated my SDK in ages and it still recognizes my device. In my case, sometimes my USB ports act funky and won't recognize my phone. I'd have to either restart the PC or switch ports and it would work. Let us know if you get the phone fully charged up

Originally Posted by chronophase1

I haven't updated my SDK in ages and it still recognizes my device. In my case, sometimes my USB ports act funky and won't recognize my phone. I'd have to either restart the PC or switch ports and it would work. Let us know if you get the phone fully charged up

So i picked up the charger and now have a charged battery! Still not sure how to get the PC to recognize the phone though... Was I right in installed the 1.4.8 Samsung mobile phone driver or is there another driver i need to use like pdanet???

OK!! Got the PC to recognize the phone being plugged in but it's still showing up as "Unknown Device" under device manager.. I'm guessing this means I don't have the right drivers, or?? Also I'm not getting anywhere under terminal "adb devices" or "adb reboot-bootloader".. saying error: device not found

Install the drivers through pdanet