I was on the latest nightly build of CM7 with Clockwork Recovery. I wanted to try ICS Passion - http://forum.xda-developers.com/showthread.php?t=1362961
It said I needed this bootloader - http://forum.xda-developers.com/showthread.php?t=1117990
That said I needed to use Odin so I used this guide - http://forum.xda-developers.com/showthread.php?p=20666234#post20666234
I got into Download mode, and Odin recognized my phone and I tried to install the new Bootloader, then it said it "failed" and my phone's screen went from the download mode to a black screen. So I unplugged my phone and took out the battery and when I put it all in, I get this screen with a phone connected to a computer with the "!" sign inbetween. Nothing I do changes it. I need help, I need this phone for work. How do I fix this?
Thanks in advance. I know it's Christmas day, and I would really really appreciate anyone who would kindly give me some direction here.
ODIN should recognize your phone in the connect to computer screen, if you see a yellow COM in ODIN, you're good to go, flash back to stock.
theexel said:
ODIN should recognize your phone in the connect to computer screen, if you see a yellow COM in ODIN, you're good to go, flash back to stock.
Click to expand...
Click to collapse
I've tried V3 and V4 and ODIN still does not see my phone. Do you have a link to the latest version? Should I have my phone connected when I run ODIN? I've tried running it when it is connected, and when it's not, and then connect it after ODIN has started. Thanks in advance!
Knightsofwar210 said:
I've tried V3 and V4 and ODIN still does not see my phone. Do you have a link to the latest version? Should I have my phone connected when I run ODIN? I've tried running it when it is connected, and when it's not, and then connect it after ODIN has started. Thanks in advance!
Click to expand...
Click to collapse
Try this.
1. Turn your phone off.
2. Take battery, sim, sdcard out.
3. Hold volume up & down buttons.
4. Connect usb without letting go of the buttons.
5. Put the battery in, without letting go of the buttons.
See if you can get to download mode that way.
theexel said:
Try this.
1. Turn your phone off.
2. Take battery, sim, sdcard out.
3. Hold volume up & down buttons.
4. Connect usb without letting go of the buttons.
5. Put the battery in, without letting go of the buttons.
See if you can get to download mode that way.
Click to expand...
Click to collapse
You are an Android saver! Thank you so much!!!
Future reference for those who red this - when you flash a boot loader UNCHECK "AUTO REBOOT". That way if it fails you can just try again.
I always uncheck it, if successful just hold the power button for 10sec for reboot.
Moped_Ryder said:
Future reference for those who red this - when you flash a boot loader UNCHECK "AUTO REBOOT". That way if it fails you can just try again.
I always uncheck it, if successful just hold the power button for 10sec for reboot.
Click to expand...
Click to collapse
I was pretty sure I did uncheck it but oh well. xD
Related
is there anyway to recover from a black screen that only shows a phone, yellow triangle and a computer? i was on the froyo test 3 rom and tried to go back to stock.
Works every time for me ..
nebur562 said:
is there anyway to recover from a black screen that only shows a phone, yellow triangle and a computer? i was on the froyo test 3 rom and tried to go back to stock.
Click to expand...
Click to collapse
1. Unplug USB
2. Pull battery
3. Open Odin
4. Plug in USB
5. Hold down both volume keys (do not let go)
6. While still holding both volume keys put battery in (this should put you in download mode), let go of vol keys
7. Unplug USB wait 5 seconds and Plug USB back in, Odin should then see it
8. Flash whatever you were trying to flash with Odin again
The above steps work for me every time, and I do have a hardware locked vibrant.
doesnt work
king101201 said:
doesnt work
Click to expand...
Click to collapse
Odd, works for me everytime ..
I wish I had more help for you ....
Works great for me as well make sure you are doing it the way he told you make take a few tries
Sent from my SGH-T959 using Tapatalk
This is the correct procedure but I cannot get anything I flash to take. I believe this is because the previous ROM had voodoo and I believe it needs to be disabled. What I can't do is find a way to disable it because I cannot access my internal sd card.
How do you access your internal sd card without a functional OS on your phone??
oo.shady.oo said:
This is the correct procedure but I cannot get anything I flash to take. I believe this is because the previous ROM had voodoo and I believe it needs to be disabled. What I can't do is find a way to disable it because I cannot access my internal sd card.
How do you access your internal sd card without a functional OS on your phone??
Click to expand...
Click to collapse
Did you try these steps yet?
Did You Flash Something Before Disabling Voodoo? 2 Fixes to Help You Out.
So you forgot to disable the voodoo lagfix before you flashed a new rom and now you're getting an error, similar to the one posted below. Even Odin won't allow you to flash back to stock. Well, pay close attention and with some luck, you'll be good as rain...or something like that.
Fix 1:
1. Download Eugenes 'Froyo that does not brick' file.
2. Extract the files.
3. Open Odin, plug in your phone, then put it into download mode.
4. load the PIT file in appropriate area.
5. load the .tar file in the PDA area.
6. DO NOT check 're-partition'.
7. Click start, let it finish. Your phone will load and reboot into stock recovery. It will error out again. DONT panic! This is what's supposed to happen.
8. Now, pull your battery.
9. Download the 'True stock 2.1 firmware for the vibrant'.
10. Extract the files.
11. Once again, open Odin, plug in your phone, put into download mode.
12. Load the PIT file into the appropriate area and the .tar in the PDA area.
13. THIS TIME you want to check the 're-partition' box.
14. Now click start, let it finish, and this time your phone will load up just fine! BAM!
Click to expand...
Click to collapse
silow said:
Did you try these steps yet?
Click to expand...
Click to collapse
Silow, THANK YOU SOOOOO MUCH!!! I panicked for about 8 hours before I found this and 1st attempt, phone boots up perfectly! Thank you for sharing!!
I cant get into download loader mode from the directions from the second post! All I get is some battery icon can someone help me!
Icedorb217 said:
I cant get into download loader mode from the directions from the second post! All I get is some battery icon can someone help me!
Click to expand...
Click to collapse
Remove the battery, select the down volume button while connecting the USB cable. this should get you into downloader mode, (Android with a shovel)
As sad as it is sometimes you just cant get into download nor will your computer see your phone. The only thing you can do is go through tmo tech support and get a replacement phone. This has happened to me a few other ppl
Try this
http://forum.xda-developers.com/showthread.php?t=749413
Doesn't work for me
pfcpt3 said:
Doesn't work for me
Click to expand...
Click to collapse
Have you tried making the usb jig? It has helped a lot of ppl and doesn't cost much to make
watcher64 said:
1. Unplug USB
2. Pull battery
3. Open Odin
4. Plug in USB
5. Hold down both volume keys (do not let go)
6. While still holding both volume keys put battery in (this should put you in download mode), let go of vol keys
7. Unplug USB wait 5 seconds and Plug USB back in, Odin should then see it
8. Flash whatever you were trying to flash with Odin again
The above steps work for me every time, and I do have a hardware locked vibrant.
Click to expand...
Click to collapse
i had the same problem, and these steps worked great for me!!!
I've searched everywherem nothing worked, can some plz tell me how to put my vibrant in DL Mode so i can restore with odin3
Kennii said:
I've searched everywherem nothing worked, can some plz tell me how to put my vibrant in DL Mode so i can restore with odin3
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=749413
if that doesn't work...
From here.. http://forum.xda-developers.com/showthread.php?t=848737
1. Get into Download Mode (WITH THE PHONE PLUGGED IN) by following the steps below
*Turn off the phone until you get to the charging battery screen (keep in mind, your phone is currently PLUGGED IN)
*Press volume up and down, and power all at once.
*As soon as the screen turns black, release your power button.
2. Unplug phone from USB
3. Open Odin (in Administrator if you're running W7 or Vista), try one of the ones I attached to this post, at least one of them is bound to work, some don't work for me, but works for others, some doesn't work for others, but works for me, whatever floats your boat
4. Load in the files into Odin that you have downloaded from above Just load in the files corresponding to the text field.
DO NOT CHECK REPARTITION.
5. Plug in your phone with the DL mode
6. Click start and wait for the magic
i can get into recovery mode but not dl mode, an my pc never recognized my phone via usb even when android worked
Kennii said:
i can get into recovery mode but not dl mode, an my pc never recognized my pc via usb even when android worked
Click to expand...
Click to collapse
Try my how-to...
Also, try pulling the battery, and then holding the Vol up+Vol dn keys, plug the usb cable in, then plug the battery back in..., make sure the usb cable is plugged into your computer...
Or.., if your phone is partially booting, then:
Code:
adb reboot download
i cant "power off" phone cause i cant boot android
Kennii said:
i cant "power off" phone cause i cant boot android
Click to expand...
Click to collapse
10 seconds: hold power...
When the phone reboots to the Vibrant screen...
Press and hold: Vol up+Vol Dn+Power....
Wait for the Vibrant screen to reboot again...
Release Power... Download mode...
* Unfortunately, sounds like you've never setup adb or the sdk. I would recommed this...
i think i have a hardware locked phone, i just got it today.
But i can get into recovery mode via hardware, so maybe i dont have hardware locked? and it IS possible to get to download mode on my phone via the buttons right?
Kennii said:
i think i have a hardware locked phone, i just got it today.
But i can get into recovery mode via hardware, so maybe i dont have hardware locked? and it IS possible to get to download mode on my phone via the buttons right?
Click to expand...
Click to collapse
Try here too, if that doesn't work for you...don't know what to tell you other than keep trying, you'll get in...
dasunsrule32 said:
10 seconds: hold power...
When the phone reboots to the Vibrant screen...
Press and hold: Vol up+Vol Dn+Power....
Wait for the Vibrant screen to reboot again...
Release Power... Download mode...
* Unfortunately, sounds like you've never setup adb or the sdk. I would recommed this...
Click to expand...
Click to collapse
when i did this i got recovery mode i'll try again.
where can i install this "adb" or "sdk" which ever ones easier?
Kennii said:
when i did this i got recovery mode i'll try again.
where can i install this "adb" or "sdk" which ever ones easier?
Click to expand...
Click to collapse
http://developer.android.com/sdk/index.html
1. Turn off device
2. Remove battery
3. Hold Vol up and Vol down (works best upside down)
4. Insert battery into device
5. Plug USB cable into device (also plugged into your computer)
Voila, Should enter download mode. Good luck!
and then what?
don't i need the pc to recognize my phone for this to work? and how would i do that if im stuck on the vibrant screen?
cvibe88 said:
1. Turn off device
2. Remove battery
3. Hold Vol up and Vol down (works best upside down)
4. Insert battery into device
5. Plug USB cable into device (also plugged into your computer)
Voila, Should enter download mode. Good luck!
Click to expand...
Click to collapse
when i do that the vibrant screen comes up and stays there
Kennii said:
and then what?
don't i need the pc to recognize my phone for this to work? and how would i do that if im stuck on the vibrant screen?
Click to expand...
Click to collapse
If you follow the steps your phone will enter download mode, In order for your PC to recognize what kind of device is plugged into it you need the samsung drivers. Which are here http://forum.xda-developers.com/showthread.php?t=728929
But im stuck on vibrant screen no OS is loaded
Kennii said:
But im stuck on vibrant screen no OS is loaded
Click to expand...
Click to collapse
Right, it sounds like you had a bad flash and your phone is stuck during boot
cvibe88 said:
Right, it sounds like you had a bad flash and your phone is stuck during boot
Click to expand...
Click to collapse
yes, so is that fixable?
Yeah definitely fixable, You just need to install the Samsung drivers onto your PC. Use Odin to flash a stock ROM onto your device and things should be better for you. I would suggest doing some research here on XDAand getting familiar with flashing a phone. Ive recovered from where you are now(a long time ago) this phone is very resilient. I have a thread over in the Q&A section with links to a video tutorial that I made for flashing a phone from stock, rooting, then all the way up to nero. Do a search on it, Good luck!
i just need to get into need to get into download mode and get odin to recongnize my phone and i should be good, it's such a pain! ;(. But THANKS for your help! I wish theres just ONE way to get into download mode.
Just tried to flash CM7 nightly #8. The phone doesn't boot just sticks at the Galaxy S Cyanogenmod screen. I can't get it into recovery and ADB won't recognize the device. The firm keys light up when you touch them. Any help is appreciated.
Thanks.
DefineIndecline said:
Just tried to flash CM7 nightly #8. The phone doesn't boot just sticks at the Galaxy S Cyanogenmod screen. I can't get it into recovery and ADB won't recognize the device. The firm keys light up when you touch them. Any help is appreciated.
Thanks.
Click to expand...
Click to collapse
my phone only shows the vibrant screen. i used to be able to get into download mode and recovery mode. i flashed htcclays cm7 1.1 then i couldnt get into download mode but i could get into recovery no problem. i flashed the new 1.2 and i lost data and all cellular capabilities. i tried to get into recovery and ref;ash 1.1 then i lost everything. i ordered a jig from ebay. im gonna have to wait for that to get here unless someone can help...
I'm going to attempt to make a jig tomorrow. :|
DefineIndecline
Can you get into Download mode? Try reverting back to stock:
http://forum.xda-developers.com/showthread.php?p=13132341#post13132341
DefineIndecline said:
I'm going to attempt to make a jig tomorrow. :|
Click to expand...
Click to collapse
Before you do that try this
1. Start Odin
2. Plug USB cable into pc
3. Power off the Phone.
3. Pull the Battery.
5. Plug USB cable into Phone.
6. Press and Hold: Volume UP + Volume DOWN + Power, all at the same time.
7. Re-insert the battery.
8. The phone will power now, when the screen starts a cycle of going to a BLACK screen, release ONLY the POWER button.
9. When you see the download icon release the volume buttons,
10. Odin back to stock by putting the PIT file into the appropriate area and the .tar in the PDA area.
+1
follow exactly wht nomad says!
I'd like to take a moment to thank all of you guys for helping me, especially Nomad! his method worked perfectly; no jig was even necessary.
Thanks a lot guys! Totally feelin' the xda love right now.
My samsung vibrant running 4.0.4 ICS zenwich 1.8.4 randomly shut off today, not even able to turn on, it was the Sleep of Death I have got before, so i pulled battery and reboot, still nothing.
The phone now boots, but their is no display
The phone will literally turn on, have the 4 buttons light up on the bottom, have the screen be responsive to touches, but the physical display is off
I can unlock my phone by swiping, hear the volume up sound, even dial calls by blind touching. It is the same idea as a PC that is plugged in, just so VGA cable to the monitor.
I have tried rebooting to recovery, download mode and tried to heimdall, but it never finds my device, i tried to sdk in and reboot to download mode via cmd prompt but no luck finding device too
I am all out of ideas and nothing is seems to be working
Any advice on resolving this issue would be appreciated
wafflebroski said:
My samsung vibrant running 4.0.4 ICS zenwich 1.8.4 randomly shut off today, not even able to turn on, it was the Sleep of Death I have got before, so i pulled battery and reboot, still nothing.
The phone now boots, but their is no display
The phone will literally turn on, have the 4 buttons light up on the bottom, have the screen be responsive to touches, but the physical display is off
I can unlock my phone by swiping, hear the volume up sound, even dial calls by blind touching. It is the same idea as a PC that is plugged in, just so VGA cable to the monitor.
I have tried rebooting to recovery, download mode and tried to heimdall, but it never finds my device, i tried to sdk in and reboot to download mode via cmd prompt but no luck finding device too
I am all out of ideas and nothing is seems to be working
Any advice on resolving this issue would be appreciated
Click to expand...
Click to collapse
Device Manager show anything is plugged in?
FaultException said:
Device Manager show anything is plugged in?
Click to expand...
Click to collapse
Yes, It shows up as the linusb winusb t-959 but neither heimdall or android sdk find the device.
wafflebroski said:
Yes, It shows up as the linusb winusb t-959 but neither heimdall or android sdk find the device.
Click to expand...
Click to collapse
So were you able to get into Download Mode at all? And if so was the display on then?
FaultException said:
So were you able to get into Download Mode at all? And if so was the display on then?
Click to expand...
Click to collapse
i think it did because it wasnt at a lock screen, and when i touched the soft buttons they would light up, but the phone wasnt in an OS.
the screen was still off though, I can't get anything to make it turn on
wafflebroski said:
i think it did because it wasnt at a lock screen, and when i touched the soft buttons they would light up, but the phone wasnt in an OS.
the screen was still off though, I can't get anything to make it turn on
Click to expand...
Click to collapse
What method did you use to get into Download Mode?
FaultException said:
What method did you use to get into Download Mode?
Click to expand...
Click to collapse
take battery out, hold vol + and - and power button, put battery in while usb connected
wafflebroski said:
take battery out, hold vol + and - and power button, put battery in while usb connected
Click to expand...
Click to collapse
You may've gotten into recovery, I can't really get into download mode like that. Try this:
Unplug USB & remove battery
Insert battery but do not power on.
Hold VOL-UP + VOL-DOWN
Insert USB and wait a few seconds, while still holding them
FaultException said:
You may've gotten into recovery, I can't really get into download mode like that. Try this:
Unplug USB & remove battery
Insert battery but do not power on.
Hold VOL-UP + VOL-DOWN
Insert USB and wait a few seconds, while still holding them
Click to expand...
Click to collapse
Ok that works, I'm defineatly in download mode, the device shows up in ODIN, but not heimdall. I am not familiar with ODIN, how would I go about flashing the ICS zen rom? I found a tutorial to flash back to stock ROM and wipe all data, but I would like to be able to just reflash the ICS rom
wafflebroski said:
Ok that works, I'm defineatly in download mode, the device shows up in ODIN, but not heimdall. I am not familiar with ODIN, how would I go about flashing the ICS zen rom? I found a tutorial to flash back to stock ROM and wipe all data, but I would like to be able to just reflash the ICS rom
Click to expand...
Click to collapse
Ok, so it shows the download mode on the screen of the phone?
If so, that's good news and means your screen is not shot.
Try to get Heimdall to work. Are you in windows? Then you'll need to uninstall the samsung drivers and do this (from CM update guide):
CM update guide said:
1. Run the included zadig.exe in the drivers folder of the Heimdall Suite.
2. From the menu, choose Options ยป List All Devices.
3. From the drop down, select Samsung USB Composite Device or Gadget Serial.
4. Click Install Driver.
NOTE: A prompt may appear warning that the installer is unable to verify the publisher of the driver. Ignore it and select "Install this driver anyway."
5. Heimdall can now be used safely on the Windows computer.
Click to expand...
Click to collapse
Once heimdall is running, try grabbing the boot.img out of the zen zip and do this:
Code:
heimdall flash --kernel boot.img
See if anything comes of that.
The screen never turned on.. it just went into download mode and i was able to see from ODIN that it was recognized. So i ODIN'd back to stock rom, i heard the phone reboot, but still no display.
Like before the phone's screen is 100% responsive, i can unlock the phone, hear the usb plugging in noise, just no display. It just blows my mind because the screen works but its not on.. I am very confused
wafflebroski said:
The screen never turned on.. it just went into download mode and i was able to see from ODIN that it was recognized. So i ODIN'd back to stock rom, i heard the phone reboot, but still no display.
Like before the phone's screen is 100% responsive, i can unlock the phone, hear the usb plugging in noise, just no display. It just blows my mind because the screen works but its not on.. I am very confused
Click to expand...
Click to collapse
That's not good. Your phone might be done for then. I once repartitioned with no partition files and still download mode worked on a fresh battery pull.
Maybe try leaving the battery out for a while and see if it fixes itself, since it seems to be an electronics problem, maybe something needs time to reset or something.
Sent from my SGH-T959 using xda premium
Yea I've had the battery out for over 30 mins and nothing. I even opened up my phone last night to check all the ribbon wires and connections, everything looked fine and i removed the motherboard & replugged everything in.. still no luck
it's a good thing my contract is up I think I am going to get the samsung galaxy s 3..
RIP vibrant best phone i ever had, I'm surprised it lasted this long with all the mods I had done to it haha
my xt890 lcd screen and digitizer were broken so i changed them and the phone was working fine for a week, i then wanted to update to kitkat through oem update; everytime i tried it would give me error . i then read that since i unlocked bootloader and rooted my phone and installed cwm recovery i couldnt do an oem update and i had to do a factory reset in order to update through oem, so i did just that ; after the phone finished factory reset and booted i proceeded with oem update while the phone was charging, everything was going fine the file was downloading, i went to the bathroom and came back the display was black, but touch screen was working fine...through more searching i read that this could be from the update, and i should do another reset... since i couldnt see anything even recovery menu. i downloaded moborobo so i can see my screen on pc and proceeded to factory reset ... now i cant even see through moborobo and im stuck. i think im stuck in recovery screen, but no way to be sure , hence i cant get usb debug.Please help.
Hey guys, I really need help with my situation. I've been looking all over the forums for 2days straight trying to find solutions to my problem. I have a galaxy s2 i777 and I had the sho-stock3 rom. Then I decided that I wanted to back up my rom, so I used rom manager to do it. that's when the problem started. when the phone tried restarting it was stuck where it says "galaxy s2" with the yellow triangle. I put it into download mode and tried to flash siyah kernel..it worked..but when I tried to reboot my phones says "firmware upgrade encountered an issue, please select recovery mode in kies and try again. of course kies wont let the phone connect. and yes all the drives are installed for my phone. now i'm just stuck trying to flash stock firmwares for the phone and the stock rom but it always fails in odin. please help me!!!!!
Hours76 said:
Hey guys, I really need help with my situation. I've been looking all over the forums for 2days straight trying to find solutions to my problem. I have a galaxy s2 i777 and I had the sho-stock3 rom. Then I decided that I wanted to back up my rom, so I used rom manager to do it. that's when the problem started. when the phone tried restarting it was stuck where it says "galaxy s2" with the yellow triangle. I put it into download mode and tried to flash siyah kernel..it worked..but when I tried to reboot my phones says "firmware upgrade encountered an issue, please select recovery mode in kies and try again. of course kies wont let the phone connect. and yes all the drives are installed for my phone. now i'm just stuck trying to flash stock firmwares for the phone and the stock rom but it always fails in odin. please help me!!!!!
Click to expand...
Click to collapse
Don't use rom manager again
Sent from my SGH-I777 using Tapatalk 4 Beta
Can you get in either cwm recovery or download mode?
Sent from my SGH-I777 using xda app-developers app
Teknodad1974 said:
Can you get in either cwm recovery or download mode?
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
yes i can get into download mode only by holding down on vol and plugging in the usb...no i cant get into cwm recovery
Try this page...
http://forum.xda-developers.com/showthread.php?t=1511906
Sent from my SGH-I777 using xda app-developers app
Teknodad1974 said:
Try this page...
http://forum.xda-developers.com/showthread.php?t=1511906
Sent from my SGH-I777 using xda app-developers app
Click to expand...
Click to collapse
thank you, my phone is back again!!
Sweet enjoy your phone buddy!
Sent from my SGH-I777 using xda app-developers app
Hours76 said:
yes i can get into download mode only by holding down on vol and plugging in the usb...no i cant get into cwm recovery
Click to expand...
Click to collapse
this SAVED me...I couldn't get it into download mode for the life of me and that worked. I now have the correct i777 JB file (I accidentally flashed the wrong version). back in the game!
Help
sbello81 said:
this SAVED me...I couldn't get it into download mode for the life of me and that worked. I now have the correct i777 JB file (I accidentally flashed the wrong version). back in the game!
Click to expand...
Click to collapse
Hello
My friend just gave me I777 with this problem cause he bought a new phone, he couldn't tell me exactly when he got that "connect to kies". I never flashed anything or installed any rom's, I just want to get it back to life. Any solutions for me?
Fratula said:
Hello
My friend just gave me I777 with this problem cause he bought a new phone, he couldn't tell me exactly when he got that "connect to kies". I never flashed anything or installed any rom's, I just want to get it back to life. Any solutions for me?
Click to expand...
Click to collapse
Can you put the phone into download mode? I would assume the answer is yes if you still get the "connect to kies" message. Following are detailed instructions for getting into download mode.
Download Mode:
There are several ways to put the phone into download mode. You should try all of them that you can before you give up.
Recovery mode:
With the phone off (and not connected to the computer), and battery installed, hold all three buttons, vol- vol+ pwr continuously until the initial boot screen appears the second time.
Download mode:
1. With the phone off and connected to the computer via USB cable, and battery installed, hold all three buttons, vol- vol+ pwr.
2. With the phone off and battery installed, hold vol- and vol+ (but not pwr) while plugging in the USB cable.
3. With the phone off and battery installed, hold vol- (but not vol+ or pwr) while plugging in the USB cable.
4. Attempt each of the above three options with the battery removed from the phone. The computer will supply the power to the phone.
5. Use Android Debug Bridge (adb) which will only work if USB debugging has been already turned on in Developer Options, since you can't boot into the system to turn it on. With the battery installed and the phone connected to the pc via USB cable, use the command "adb reboot download".
6. Use a USB jig. With the battery installed insert the USB jig into the USB connector of the phone. Some have reported that this method works when no other method would work.
If the phone will go into download mode, you will need to use Odin desktop to flash the stock firmware. You should use the latest stock firmware. Go to the Download Repository and download Odin3 v1.85 from the link near the top of the page, and also download the latest stock firmware, "I777UCMD8 Stock Binaries (Android 4.1.2 Jelly Bean)" from near the bottom of the page. It's the next to last item. Download both to your Windows pc, and then follow the detailed instructions below to flash it onto your phone.
How to use stand-alone Odin3 to flash firmware:
Follow and recheck each of the following steps. Do them in order listed, as some steps are dependent on previous steps. Instructions are for Odin3 v1.85. It should work with any version of Odin, but some details, like color of items, may be different.
1.) Open Odin on the Windows Desktop.
2.) Have the USB cable plugged into USB port on the computer, but *Not* plugged in to the phone.
3.) Shut the phone off.
4.) While holding down the vol+ & vol- keys, plug micro-usb plug into phone.
5.) In Odin, you should get the yellow box under where it says ID:COM with the text 0:[COMx], and in the Message area, <ID:0/00x> Added!! where x is some number, usually 1-8.
6.) In Odin, make sure Auto Reboot and F. Reset Time are checked and all other items are not checked.
7.) Click on the PDA button. Browse to the tar file you want to install and select it so its path appears in the text edit box next to the button.
8.) Make sure the check box next to the PDA button is checked.
9.) Click the Start button.
10.) You should see the green progress bar advancing.
11.) When complete, you will get a PASS (or FAIL if unsuccessful).
The phone should boot up normally. If it does not, enter recovery (see instructions in the download mode section) and perform a wipe data/factory reset.