Hi everyone, have a great 2018 I'm getting the same error code 80009000 while trying to rollback. I have a problem with the tuning wheel on my JTV69, when set to standart the tuning is half step down. I have had a similar problem months ago with the actual tuning mismatching the reading on the tuning wheel and it was solved after rolling back firmware to 1.70 and forward to 2.21. But now I get the 80009000 when attemping the rollback. Any ideas? Hardware issue? Thanxs
Hello, same issue here. Tuning wheel doen't match the actual tuning en behaves inconsistently. I live in Argentina, do you have a qualified service here. I have only found a distributor. Thanks.