Main Code Image Download Error

[lacasapc]

hi,
i am doing the correct process to unlock motorola c139 tracfone v8.8.17,

i have like 80 phones to unlock,
i am flashing them with 1.0.24 main, lp, and flex
all ok

i have done 10 and come good,

but some of the phones just come with white screen after flashed, and
one of them gave me this message
"maincode image download error"

please tell me how to solve this 2 cases
thank you

[InfinityHelp]

Hello!

for white screen maybe is needed another software version.
try to flash another version and check if now LCD is ok.
try this and post result

you can try this method for second case also