98 PCM repair
The 98 PCM has 2 memory chips one being an eeprom. If it gets corrupted by a bad flash it will be toasted. It's repairable but you need a valid binary from a good one with exact same hardware.
The files you get from reading the tune are not what you need, you have to take apart a good PCM to dump the files. These files only work with the same hardware type, there are a few so you need to take apart every variation of this PCM (and risk destroying it) to have the files need to do repair work.
That's why nobody wants to repair them.





