Apparently I have severly bricked my S620.

[The Rotagilla]

I was attempting to change to ookba's 3VO ROM but the operation failed and the ROM did not install. I did get the recovery instructions screen and followed them but the phone did not reset to the previous ROM (NRGZ28's EnergyROM 52409). The phone hangs on the Windows Mobile screen. I have done the following -

1) Followed ookba's recovery instructions and gotten the tri-band screen. However whenever I try to flash back to the T-Mobile ROM (any version) I get Error 260.

2) Followed stylez hard reset instructions and gotten the reset screen but the phone hangs on the Windows Mobile boot screen. A hard reset does not occur.

3) Followed NRGZ28's "In Case Things Go Wrong" instructions and gotten the tri-band screen, however when I try to flash the EnergyROM (or any other non T-Mobile ROM) I get corrupted image errors.

4) I have used jockeyw2001's bootloader but get Error 260

Also, the power button does not turn the phone off. I have to remove the battery to get it to shut down. I think I have tried all the recovery steps I know if. If anyone has a suggestion or solution I would be most appreciative. Thanks.

[ookba]

I was attempting to change to ookba's 3VO ROM but the operation failed and the ROM did not install. I did get the recovery instructions screen and followed them but the phone did not reset to the previous ROM (NRGZ28's EnergyROM 52409). The phone hangs on the Windows Mobile screen. I have done the following -

1) Followed ookba's recovery instructions and gotten the tri-band screen. However whenever I try to flash back to the T-Mobile ROM (any version) I get Error 260.

2) Followed stylez hard reset instructions and gotten the reset screen but the phone hangs on the Windows Mobile boot screen. A hard reset does not occur.

3) Followed NRGZ28's "In Case Things Go Wrong" instructions and gotten the tri-band screen, however when I try to flash the EnergyROM (or any other non T-Mobile ROM) I get corrupted image errors.

4) I have used jockeyw2001's bootloader but get Error 260

Also, the power button does not turn the phone off. I have to remove the battery to get it to shut down. I think I have tried all the recovery steps I know if. If anyone has a suggestion or solution I would be most appreciative. Thanks.
Maybe its safe to assume you have a hardware issue? Since the initial flash and following consecutive flashes failed, maybe its a bad USB cable? I would try reflashing the shipped T-Mobile ROM from a different PC altogether using a different USB cable. Since your phone gets to the Bootloader (multicolor) screen means it's not bricked. Try different PC and cable hardware...

[The Rotagilla]

Will do. I did try another hard reset and the boot screen has sat for over 20 minutes without getting past it.

[stylez]

Or try flashin stock ROM via SD

[blackshin0bi]

you must flash to official rom to make any progress at this point. at least thats what i had to do when my computer auto-restarted in the middle of one of my flashes.

[The Rotagilla]

Fixed, thanks for the help.

[muga]

how did you fix it cause i'm having the very same problem

[The Rotagilla]

Switched from a PC running Windows 7 to one running XP.

[orb3000]

how did you fix it cause i'm having the very same problem

Welcome to the forum

Also reading here would help http://forum.xda-developers.com/showthread.php?t=415225

[muga]

Well that didn't work for me its stuck it the multi colour screen and pc not flashing it. When it does recognise and start to flash i see a count down screen like the one on pc but only stops at 3percent

[Mr. Clown]

Well that didn't work for me its stuck it the multi colour screen and pc not flashing it. When it does recognise and start to flash i see a count down screen like the one on pc but only stops at 3percent

Muga, It's also happening to me. I had previous flashes with different roms Kavana's, rose, energy (6.1 release) and everything went well with no problems at all. But a few days ago, I tried to flash my excalibur with the latest release by NRGZ28 (energy rom 6.5) and what I think what happened was that I didn't run the unlock file aplications (since I didn't have to do it in the other flashes, because I already had unlock the phone with the first upgrade) that's the only explanation I can get. At the end, I came up with the frozen screen and I've tried the bootloader steps, original rom installation, hard reset with no succes at all. What I get is the same error you have.