ANSWERED changing 78 to 79

[Shibby_Stoner]

hello!
I have hitachi 78 and I want convert to 79.
How to do this safety?

Once i was trying to change OFW in 79 from 4b00 to 4d20.
I used option Free Flash, and everything went well and seems to be okey, but it didn't pass stability test, and at the end i get it brick...

 

[Martin C]

You would need to lift the TSOP, reprogram, refit and set master checksum.