the unlocked PCB has a switch to change lock/unlock. you have to move the switch to unlock, flash the 0272 fw and put the switch to lock again. to guaranteed live safety.
if it shows in JF as 9504 - your pre 13146 dash.....
upating it to 0272 via jf will not lock it, but that will not help you.
you will need to put the original PCB in your console, and update the dash, which whill flash and lock the original PCB.
then flash the TX PCB to LT2.0 for the 0272 and you're good to go
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