Database Develop

Odin 1Click

Since the new Froyo release, I've noticed people having problems with Odin and restoring their phone. This is what i've discovered:
I've been successfully able to reflash my phone on Win7 64bit using Odin and the Samsung drivers ONLY when doing the install from a phone which has been put in download mode from a battery pull, remove SIM card, holding down vol up/down and plugging in the USB cable. This download mode flashes whatever i'm looking to flash. IF however i do an adb reboot download from whatever i'm currently using, run Odin and plug in the USB cable, the phone sits at DO NOT POWER OFF!! for hours if I'd let it.
Just a little tip for those who are having problems.

I've just been having issues. Downloading the new Odin because I'm sitting at the computer screen now.

terrigan said:
Since the new Froyo release, I've noticed people having problems with Odin and restoring their phone. This is what i've discovered:
I've been successfully able to reflash my phone on Win7 64bit using Odin and the Samsung drivers ONLY when doing the install from a phone which has been put in download mode from a battery pull, remove SIM card, holding down vol up/down and plugging in the USB cable. This download mode flashes whatever i'm looking to flash. IF however i do an adb reboot download from whatever i'm currently using, run Odin and plug in the USB cable, the phone sits at DO NOT POWER OFF!! for hours if I'd let it.
Just a little tip for those who are having problems.
Click to expand...
Click to collapse
I was able to go back to stock using ODIN, although i did not have to do a battery pull, using the drivers provided in one of the threads here on XDA I was able to hold both volume keys and plug in the cable to enter download mode. everything worked fine... i then installed root and clockwork, and restored my nandroid backup.

[Q] Bricked phone after flashing with ODIN?

This might not be bricked, but if it isn't it must be as close as it can get. I flashed my phone back to stock 2.1 yesterday, and today when I tried to flash to cognition 8.1 it got stuck on "<ID:0/005> boot.bin" for a half hour. I unplugged it, and now my phone is stuck on the picture in the attachment.
- I can't get my computer to even pick it up with USB. Nothing happens at all.
- The only time it turns off is when I hold power, volume up, and volume down. Even then, it immediately boots right back into that picture. Nothing else happens.
- I can't get into download mode.
- When I remove the battery, it goes right back to this screen.
What can I do?

Happened to me earlier.
Do the following to get into download mode:
1) take out battery
2) put in battery
3) hold the vol up and vol down keys, then plug in the USB cord.
It will boot into download mode. Then try do what you were doing.

stuff said:
Happened to me earlier.
Do the following to get into download mode:
1) take out battery
2) put in battery
3) hold the vol up and vol down keys, then plug in the USB cord.
It will boot into download mode. Then try do what you were doing.
Click to expand...
Click to collapse
This hasn't worked before, but I went ahead and tried it again. It still just goes straight to the black screen with that picture in the center.

Hmm.
Well, I'm sure one of the 3 methods posted in the odin3 thread, on how to get to download mode, should work.
For me, it was the volume up and down buttons together, then plugging in the usb. It would turn on automatically and go straight to download mode.

None of the ones from this thread work:
http://forum.xda-developers.com/showthread.php?t=731989&page=96

evanstapler said:
None of the ones from this thread work:
http://forum.xda-developers.com/showthread.php?t=731989&page=96
Click to expand...
Click to collapse
Look under your battery below the serial numder of you phone and see if your batch is 1008. If it is those batches don't go into download mode. Send your phone in for waranty repair.

Rhiannon224 said:
Look under your battery below the serial numder of you phone and see if your batch is 1008. If it is those batches don't go into download mode. Send your phone in for waranty repair.
Click to expand...
Click to collapse
I don't see 1008 at all. I've booted into download mode before, even using the three button combo, I just can't now.
Would AT&T even cover this? Will they know I was tampering with stuff I shouldn't have?

Have you tried running Odin as administrator? Uninstall and reinstall the drivers for Odin. Keep trying, remove SIM, battery and external, hold the volume buttons only and plug phone in, keep trying, it should work. Blame the OTA for the "brick" and send it for warranty if you can't get Odin to work.

Rhiannon224 said:
Uninstall and reinstall the drivers for Odin.
Click to expand...
Click to collapse
Try doing this.

You know its interesting to see how many times I see people tell you to pull the battery, sim etc. Maybe I'm just lucky, but when I put my phone into download mode I power it off, open odin on my pc, hold down the volume buttons but NOT the power button and plug in the micro usb cable. Works everytime for me even with the PC /!\ Phone screen.

Rhiannon224 said:
Have you tried running Odin as administrator? Uninstall and reinstall the drivers for Odin. Keep trying, remove SIM, battery and external, hold the volume buttons only and plug phone in, keep trying, it should work. Blame the OTA for the "brick" and send it for warranty if you can't get Odin to work.
Click to expand...
Click to collapse
I've uninstalled and reinstalled twice, kept rebooting and removing my SIM and battery (no SD), changed USB ports, made sure each USB port works... Nothing has worked.
EDIT: The drivers I used were from here: http://forum.xda-developers.com/showthread.php?t=731989

Man, I'm not sure.
Either you're doing the button combo wrong.. since you said it worked before, or you're gonna have to send it in for warranty.
Remember don't press the power button. Just hold the volume up, volume down button, and plug in the usb cable

I'm about to go to AT&T for an exchange. Wish me luck.
In the meantime, though, what's the easiest, least-risk of screwing up way to get a brand new captivate on cognition 8.1 with the z4mod?

I would say wait until the CW issues are worked out with BETA9 and just CW flash it. I've bricked two batch 1008 Captivates from Odin freezing mid-flash today. I even flashed DG's 3ButtonFix first, to make sure I'd be able to do a button combo to get back into download mode, and no dice.

Epiphany said:
I would say wait until the CW issues are worked out with BETA9 and just CW flash it. I've bricked two batch 1008 Captivates from Odin freezing mid-flash today. I even flashed DG's 3ButtonFix first, to make sure I'd be able to do a button combo to get back into download mode, and no dice.
Click to expand...
Click to collapse
Wow that's interesting. I also have a batch 1008 and when I flash with odin it's fine. But after every time I flash to stock jf6 I lose 3 button combo and just reinstall the fix zip using clockwork. Download mode using both volume keys then plug in usb always works for me though even without the fix.
Sent from my SAMSUNG-SGH-I897 using XDA App

silverslotcar said:
Wow that's interesting. I also have a batch 1008 and when I flash with odin it's fine. But after every time I flash to stock jf6 I lose 3 button combo and just reinstall the fix zip using clockwork. Download mode using both volume keys then plug in usb always works for me though even without the fix.
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
Same here...I have 1008 and no issues flashiing back to stock losing the three button and either using adb or fix zip to get into Download mode.

[Q] HELP!!!Cannot restore to stock ROM

Hi there I got a Samsung captivate SGH-I897 and I got a custom rom installer from Rom Kitchen. I wanted to go back to stock rom but once i get into download mode the phone not loading the rom ODIN stays in DO NOT TURN OFF THE TARGET!please help get out of that and use my phone again!the Base Rom i Used on custom rom is XWJS5 v9.6 with Firebird Kernel
Thank you for your time

close odin 1 click, unplug phone leave it in d/l mode, open odin plug phone back into usb, you should see a com port then like 7 or 3 or something. then hit start. Sometimes I have to repeat process 3 or 4 times before odin works right. if it isnt doing anything unplug it, remove battery put battery back in hold volume buttons down when u plug it back into usb and should go back to d/l mode. make sure odin is opened first.

I ve tried all these the problem is that I am at Phone - ! - PC and its hard to get to Download Mode but after many tries I all of a sudden I get in that mode then nothing more I can do!

Does Odin recognize the phone when you connect the USB cable when your phone is in download mode? Also which OS is your PC running? I was having an issue with Odin not pushing the stock rom and I had to start it as administrator in Win 7 to get it to work.
Sent from my SGH-I897 using XDA App

Yes DOES recognize the phone but not pushing the ROM on it!I am on Windows 7 and i always run ODIN as Admin!
Any ideas?

I've heard Odin can be flaky and may take several attempts before it will work. I would keep trying. Also possibly change which USB port you are using on your computer and see if that helps. I was in this exact same scenario last week. I would turn on the phone and get the computer/phone/exclamation point of death screen. I couldn't get the phone to boot or into download mode without using a JIG. Finally on about the third try Odin worked for me. I started Odin as admin and almost as soon as I plugged in the phone to USB I hit flash and it worked. Best of luck...

Odin is not flaky. It works if you follow instructions. It's the user's fault, not the software.
Anyway, this is probably the ten millionth time I've posted this in the last hour, but here's how to get into download mode if nothing else works. If this doesn't work, you hard bricked your phone and would need a JTAG flash.
Loggik said:
Unplug the phone from the computer and remove the battery, SIM, and external SD if there is one.
1. Open Odin one click.
2. Plug the phone in (without the battery in the phone). Do not press any buttons, especially the power button.
3. Press and hold the volume rocker (holding down both volume up and down).
4. Insert the battery while holding the volume rocker.
5. The phone should boot into download mode. You can then let go of the volume rocker.
Now wait 30 seconds (if you press "Start" too soon, it will not work). Then press "Start" and your flash should finish.
Click to expand...
Click to collapse

my phone is in download mode but odin hung once i unplugge and plugged back in ever since phone isnt see by odin or pc?

Yes, as I stated in my post above; you must reboot your phone every single time you go into Download mode. What I mean by that is that if you go into Download mode and plug your phone in, then unplug it, you cannot plug your phone back in unless you reboot your phone.

Loggik said:
Yes, as I stated in my post above; you must reboot your phone every single time you go into Download mode. What I mean by that is that if you go into Download mode and plug your phone in, then unplug it, you cannot plug your phone back in unless you reboot your phone.
Click to expand...
Click to collapse
if youre reffering to me my cappy was bricked all it will do now is go into download mode if i do the 3 resistor trick to force it to but then its not seen by pc now

leo5111 said:
if youre reffering to me my cappy was bricked all it will do now is go into download mode if i do the 3 resistor trick to force it to but then its not seen by pc now
Click to expand...
Click to collapse
Didn't realize that you weren't the OP. Regardless, I was referring to you.
Anyway, this is a more serious case than I thought. Have you used the AIO Captivate Tool? If so, did you install the LibUSB drivers? Those will disable Odin from working (I'm probably going to PM Bay_wolf sometime soon about that...).
Do get everything working again:
Plug the phone in while it's in Download mode. Open the start menu, right click on "Computer", and click "Manage". In the left sidebar, select "Device Manager".
There will be a dropdown labeled "LibUSB Devices" or something with the word libusb in it. Find that dropdown, right click the Samsung USB Device or whatever it's called and select "Update Driver Software...". Then select "Search automatically for updated driver software."
An alternative is to just use the "Flash to Stock" option in the AIO tool. This and the above is assuming that you had used the AIO Tool and installed the LibUSB drivers previously. If you have not, then you may have to try and re-install the Samsung drivers. If that doesn't work, ask to borrow a friend's computer for now to flash back to stock, because this happened to me before and I didn't know how to fix it, but I was about to re-install Windows anyway so I never figured it out.

im on xp and pc sees my cappy but odin execution 1.00 is stuck on examing files is there another version i should be trying? if it helps this is what i was trying to get off my phone when the crap hit the fan http://forum.xda-developers.com/showthread.php?t=940330 and i tried to put paragon 6 on and it kept erring because i needed to do a odin job first on it

I finally managed to turn my phone on last nigh by doing the following:
1.Open Odin
2.Get in download mode (it took me many tries but finally I made it)
3.Disconnect phone
4.Reconnect phone
5.Choose the PIT file
6.Uncheck Auto Reboot
7.Hit Start
After that I took out the battery put it back again and power up.the phone will boot but not show the main screen it will only vibrate!then i used the AIO pack to put it back in recovery mode and i reinstalled the Custom Firmware I was using. Now is on and working again!I really dont know now if I can flash back to stock!

niderium said:
I finally managed to turn my phone on last nigh by doing the following:
1.Open Odin
2.Get in download mode (it took me many tries but finally I made it)
3.Disconnect phone
4.Reconnect phone
5.Choose the PIT file
6.Uncheck Auto Reboot
7.Hit Start
After that I took out the battery put it back again and power up.the phone will boot but not show the main screen it will only vibrate!then i used the AIO pack to put it back in recovery mode and i reinstalled the Custom Firmware I was using. Now is on and working again!I really dont know now if I can flash back to stock!
Click to expand...
Click to collapse
did you use thee pitfile came with odin in the all in one or did you select another pitfile if you used a differnt pitfile then comes with odin 1.00 that might be my issue

No no I dont use this on I use one I had on my PC.
I think the problem is a write protection as I can see when i connect the phone it displays a CDROM drive when I click on it, opens ok but I cant write anything on the phone.and every time I try to use ODIN to flash to stock it stays in DO NOT TURN OFF THE TARGET and nothing happens!
Any ideas on how to get back to stock firmware?

After flashing the 2.3.3 GB.....

Ever since I have flashed 2.3.3 I've been having problems.
-Download mode can only be accessed from adb reboot download
-The only way I got drivers to recognize in download mode was to install them from Samsung Kies mini.
-No button combination works to get into download mode, it takes you to recovery mode every time.
-My four touch button lights will not shut off after turning phone off and vibration confirming shut down.
Once I finally got it back to 2.1 stock via Odin one-click, I used Kies mini to upgrade to 2.2. I still have these same problems, all which started happening after I upgraded to the 2.3.3 SamFirmware leak. Not only have I been reading these problems from this leak but from other roms using 2.3.3.
To clarify, I am not blaming anyone, I am simply looking for a fix or to be told that I have done something wrong. Anything will be appreciated, thanks.

Jmurph3 said:
Ever since I have flashed 2.3.3 I've been having problems.
-Download mode can only be accessed from adb reboot download
-The only way I got drivers to recognize in download mode was to install them from Samsung Kies mini.
-No button combination works to get into download mode, it takes you to recovery mode every time.
-My four touch button lights will not shut off after turning phone off and vibration confirming shut down.
Once I finally got it back to 2.1 stock via Odin one-click, I used Kies mini to upgrade to 2.2. I still have these same problems, all which started happening after I upgraded to the 2.3.3 SamFirmware leak. Not only have I been reading these problems from this leak but from other roms using 2.3.3.
To clarify, I am not blaming anyone, I am simply looking for a fix or to be told that I have done something wrong. Anything will be appreciated, thanks.
Click to expand...
Click to collapse
I asked this over in other thread too buddy. What are the key combos u have tried?

watsa said:
I asked this over in other thread too buddy. What are the key combos u have tried?
Click to expand...
Click to collapse
I have tried the 3-buttom combo - volume - and + along with the power. release power when att boot logo comes up. I've even tried to hold power down and let it cycle through the boot logo a couple times before releasing it. No luck, only recovery mode.
remove battery, sim, sd card. hold both volume - and +. put in battery and Usb cable as soon as battery is in. no luck, only recovery mode.
I've even tried the i9000's download mode. I think its volume down and power...only recovery mode.
The only way I was able to get into download mode was adb reboot download. I haven't tried a jig.

Jmurph3 said:
Ever since I have flashed 2.3.3 I've been having problems.
-Download mode can only be accessed from adb reboot download
-The only way I got drivers to recognize in download mode was to install them from Samsung Kies mini.
-No button combination works to get into download mode, it takes you to recovery mode every time.
-My four touch button lights will not shut off after turning phone off and vibration confirming shut down.
Once I finally got it back to 2.1 stock via Odin one-click, I used Kies mini to upgrade to 2.2. I still have these same problems, all which started happening after I upgraded to the 2.3.3 SamFirmware leak. Not only have I been reading these problems from this leak but from other roms using 2.3.3.
To clarify, I am not blaming anyone, I am simply looking for a fix or to be told that I have done something wrong. Anything will be appreciated, thanks.
Click to expand...
Click to collapse
I got the same issue. The worse thing for me is I cannot get it back to 2.1 stock via Odin one-click because the driver can't recognize the device any more (It works fine before flashing to GB). How do you get it back to 2.1 stock?

wzeng2000 said:
I got the same issue. The worse thing for me is I cannot get it back to 2.1 stock via Odin one-click because the driver can't recognize the device any more (It works fine before flashing to GB). How do you get it back to 2.1 stock?
Click to expand...
Click to collapse
I downloaded kies mini from the samsung site. Once installed, you can find an option to install the phones drivers when the phone is recognized by kies. Odin registered my phone in download mode after that and I was able to one-click back to stock.
Sent from my SAMSUNG-SGH-I897 using XDA Premium App

I am going to try that.

I had this problem when going to a 2.3.3 rom before, sometimes it just needs a little and some tender loving repeatable connects, other times maybe just to be left alone for a day or two... I'm not sure if this will work but if you can get a com port from Odin 1 click without having to be in download mode I.e. the phone is on, try a master clear, let the phone boot up and see if you were able to get a com port again(leave it connected during boot), then do various methods to get in download mode starting with the GB method
Hope any of this helps at all
Sent from my I897 using XDA App

Try powering phone off, then while phone is off, hold vol down (just down, not up and down) and insert usb. Should give you dl mode

mrhaley30705 said:
Try powering phone off, then while phone is off, hold vol down (just down, not up and down) and insert usb. Should give you dl mode
Click to expand...
Click to collapse
You're right. It should, but if the 2.3.3 ROM is effecting everyone the same way. NO BUTTON COMBOS WORK. That's just it. You can name it, and I've tried it. It does not work. Only thing that does work is adb reboot download. I have not tried a jig, but why bother if the phone boots.

Does your volume down button work?

philhachey said:
Does your volume down button work?
Click to expand...
Click to collapse
It does, indeed. All of my buttons work. Still, I only get to recovery.
Sent from my SAMSUNG-SGH-I897 using XDA Premium App

I too am having the same problem with 2.3.3 i897UCKF1 boot loaders. I can't get into download mode or recovery. Hopefully a jig will work

Could it be Rom/Kernel issue? Im on i897UCKF1 Boot loaders with Cog 5 B3 and works fine for me. I have that issue before though the phone just didn't want to go in to down load mode for me, but it was with froyo.

brievolz84 said:
I too am having the same problem with 2.3.3 i897UCKF1 boot loaders. I can't get into download mode or recovery. Hopefully a jig will work
Click to expand...
Click to collapse
Download Android Terminal Emulator from market. Once it's installed, open it, and type su. This should have the app ask for root rights. Once you allow it, type reboot download and press the enter button on the virtual keyboard. if the phone just goes black and doesnt reboot after a short while, just battery pull and turn it back on. You can also use this method to get into recovery by substituting reboot download with reboot recovery.

Twicebak3d said:
Download Android Terminal Emulator from market. Once it's installed, open it, and type su. This should have the phone ask for root rights. Once you allow it, type reboot download and press the enter button on the virtual keyboard. if the phone just goes black and doesnt reboot after a short while, just battery pull and turn it back on. You can also use this method to get into recovery by substituting reboot download with reboot recovery.
Click to expand...
Click to collapse
Sorry for being cryptic on my initial post, this is what I'm dealing with. I can't get the phone out of phone---!---computer screen and I've tried all the button combinations.
here's what I did. I was in stock enclair and copied continuum 6.1 to the sd card. I then get into download mode to flash 2.3.3 boot loaders. That was successful so I booted back into download mode to flash the talon kernel. I changed the zip to a tar so Odin 1.83 can recognize the file in the pda section. I clicked start and odin failed (I didn't know you had to be in recovery mode to flash the kernel it wasn't listed in the instructions I had). I rebooted the phone and got the phone---!---computer screen with this message:
Firmware update failed ! Try going into Recovery mode.
Hope this helps

brievolz84 said:
Sorry for being cryptic on my initial post, this is what I'm dealing with. I can't get the phone out of phone---!---computer screen and I've tried all the button combinations.
here's what I did. I was in stock enclair and copied continuum 6.1 to the sd card. I then get into download mode to flash 2.3.3 boot loaders. That was successful so I booted back into download mode to flash the talon kernel. I changed the zip to a tar so Odin 1.83 can recognize the file in the pda section. I clicked start and odin failed (I didn't know you had to be in recovery mode to flash the kernel it wasn't listed in the instructions I had). I rebooted the phone and got the phone---!---computer screen with this message:
Firmware update failed ! Try going into Recovery mode.
Hope this helps
Click to expand...
Click to collapse
Does your computer recognize your phone as anything while you're in the phone!pc state? You could try Adam's Once-Click Unbrick.

Twicebak3d said:
Does your computer recognize your phone as anything while you're in the phone!pc state? You could try Adam's Once-Click Unbrick.
Click to expand...
Click to collapse
It sure does, odin recognizes it and the sound comes on when the phone boots
EDIT: It says I need to put it in download mode which is the problem I'm having

Did you try the OCUB I posted? It's supposed to work at that screen. Yes, it does run on Windows lol.

Twicebak3d said:
Did you try the OCUB I posted? It's supposed to work at that screen. Yes, it does run on Windows lol.
Click to expand...
Click to collapse
I just did and the phone reset and is in enclair. Now lets see if I can get Continuum to flash. Thank you so much!!

Jmurph3 said:
You're right. It should, but if the 2.3.3 ROM is effecting everyone the same way. NO BUTTON COMBOS WORK. That's just it. You can name it, and I've tried it. It does not work. Only thing that does work is adb reboot download. I have not tried a jig, but why bother if the phone boots.
Click to expand...
Click to collapse
Even though the phone boots - a jig I've found is a GUARANTEED way to get into download mode. A jig is a VERY useful tool and only costs like $8. If you plan on flashing your phone again in the future - it's certainly NOT a waste to buy one.

Help...Cant get phone into download mode.

I used odin 1 click to get phone back to stock . Now my phone will not go into dl mode with any of the button combos.Also i can not get into recovery.Other than those 2 things the phone boots up and works.Any help please..

Which Odin one click ? And what were you running before you did the one click?

Use a jig for dl mode.

You tried Vol Down-Power and then after the splash screen releasing the power button and continuing to hold Vol Down.
Does your phone fully boot? If it does and you have adb on your computer. Turn on USB debugging, connect the phone to your computer via USB, and then use the command 'adb reboot download' without the '
Hope that works for you.

I used odin 1 click flashed phone back to eclair 2.1 I897UCJF6..The phone will boot into eclair and function properly but i cant get to dl mode or recovery.thanks for the responses

Its risky but IF YOU ARE ON 2.1 YOU CAN FLASH THE 3 BUTTON FIX, or flash i897 gingerbread bootloaders, but DO NOT FLASH THE 3 BUTTON FIX AFTER FLASHING THE GINGERBREAD BOOTLOADERS OR YOU WILL BE HARD BRICKED YOU HAVE BEEN WARNED!!!!!!
Sent from my SAMSUNG-SGH-I897 using XDA App

holeindalip said:
Its risky but IF YOU ARE ON 2.1 YOU CAN FLASH THE 3 BUTTON FIX, or flash i897 gingerbread bootloaders, but DO NOT FLASH THE 3 BUTTON FIX AFTER FLASHING THE GINGERBREAD BOOTLOADERS OR YOU WILL BE HARD BRICKED YOU HAVE BEEN WARNED!!!!!!
Sent from my SAMSUNG-SGH-I897 using XDA App
Click to expand...
Click to collapse
I would recommend i897 GB bootloaders instead of the 3 button fix. It still fixes the button problem, but never, never, never flash the 3 button fix after flashing GB bootloaders. You have been warned again.

ok finally got into dl mode but when i plugged phone up to usb it went to the phone ! computer screen what do I do.Thanks in advance..

jnblackmon30 said:
ok finally got into dl mode but when i plugged phone up to usb it went to the phone ! computer screen what do I do.Thanks in advance..
Click to expand...
Click to collapse
Does Odin recognize the phone? If so, just flash from there.

odin will not recognize.Any sugestions? Thanks
will a jig get me to d/l mode from here?

jnblackmon30 said:
odin will not recognize.Any sugestions? Thanks
will a jig get me to d/l mode from here?
Click to expand...
Click to collapse
It should. Also, hold volume up + down, then plug in USB should also. Before you try that, restart your computer and pull the battery on the phone for a couple minutes before trying again. Have Odin open before you plug in the phone. Make sure you are using a pry on the back of the computer ( #1 on a laptop).

Followed ur directions still no go.You have any other ideas without a jig?Thanks

jnblackmon30 said:
Followed ur directions still no go.You have any other ideas without a jig?Thanks
Click to expand...
Click to collapse
No. I used a jig last time it happened to me. They only cost about $10.

thanks for all your help.I ordered 1 from ebay...thanks again

No problem. Hope you get it.

Have you tried adb?
Sent from my SAMSUNG-SGH-I897 using XDA App

jnblackmon30 said:
ok finally got into dl mode but when i plugged phone up to usb it went to the phone ! computer screen what do I do.Thanks in advance..
Click to expand...
Click to collapse
I had this a cpl of times, u'll have to reinstall drivers (uninstall first) ,or I use kies mini to reinstall drivers all the time when the pc won't recognize it (this usually happens after switching bootloaders), reboot ur pc and after that ur pc should pick it up (found new hardware). Once the drivers are loaded head back to odin and this time ur com port should light up.

Try this method for download mode... It's worked on every build captivate I've tried, even the fabled 1008 build.
1. Turn off phone, pull battery, sim card, sd card
2. Open ODIN (optional)
3. Plug in USB, then hold both volume buttons (NOT power button)
4. Re-insert battery while still holding volume buttons.
Phone should instantly boot into download mode