Hi Guys, I have exactly the same problem on my C510 after unlocking using Aerix which failed: "Device initialization failed & Close all applications that might be interfering". I tried to reflash the phone a few times using A2uploader which seems to work and complete but still the phone does not switch on. The battery was fully charged when I did the unlock and I believe it's still fully charged now. Please see log of A2uploader:
ChipID:E800,EMP protocol:0401
BOOTROM MODE DETECTED
OTP LOCKED:1 CID:52 PAF:1 IMEI:3..... CERT:RED
LDR:2008-07-23 11:47 1202-0422_DB3210_EXPLORER_LOADER_APP_SDRAM_R2A065
LDR CAPS:SYSTEM FLASH GDFS FILESYSTEM TA
LDR:2009-04-21 18:29 1202-0421_DB3210_CS_LOADER_ACC_SDRAM_R2A081
LDR CAPS:SYSTEM FLASH SIGNATURE AUTH
writing "C:\Documents and Settings\Administrator\My Documents\Downloads\Flash 130110\C510_R1DA029_MAIN_GENERIC_KT_RED52.mbn"
ALLOWED DOMAINS:BLUE BROWN RED
MAXIMUM CID:52
Will flash 816 blocks...
ssw file accepted
writing "C:\Documents and Settings\Administrator\My Documents\Downloads\Flash 130110\C510_R1DA029_FS_WESTERN-EUROPE_RED52.fbn"
ALLOWED DOMAINS:BLUE BROWN RED
MAXIMUM CID:52
Will flash 1120 blocks...
ssw file accepted
Elapsed:879 secs.
ChipID:E800,EMP protocol:0401
BOOTROM MODE DETECTED
OTP LOCKED:1 CID:52 PAF:1 IMEI:3....... CERT:RED
LDR:2008-07-23 11:47 1202-0422_DB3210_EXPLORER_LOADER_APP_SDRAM_R2A065
LDR CAPS:SYSTEM FLASH GDFS FILESYSTEM TA
LDR:2009-04-21 18:29 1202-0421_DB3210_CS_LOADER_ACC_SDRAM_R2A081
LDR CAPS:SYSTEM FLASH SIGNATURE AUTH
Elapsed:64 secs.

ANY HELP PLEASE - THANK YOU VERY MUCH.