Maybe the ROMs are rotting out, but I'd make sure the power supply is working properly first. I had one unit starting to have cracked solder joints on the power supply board in the late 90s. It had a lot of hum coming from the headphones and output jacks. Capacitors could be going bad as well too. If you can check with a multimeter, maybe you have a lot of AC ripple or wrong voltages coming through
Le ven. 17 mai 2019 01 h 50, Sylvester Leontiadis dir_marillion@... [k5synth] <k5synth@yahoogroups.com> a écrit :
Hi,It looks like a rom problem?Have you tried new ROMS ?
From: k5synth@yahoogroups.com <k5synth@yahoogroups.com> on behalf of cball@... [k5synth] <k5synth@yahoogroups.com>
Sent: Friday, May 17, 2019 5:47 AM
To: k5synth@yahoogroups.com
Subject: [k5synth] Re: K5m Verify ErrorHello K5 Group,
After letting the K5 sit for a few days with the battery disconnected and the display not plugged in, I decided to try it out again with no battery.
Surprisingly I was able to adjust parameters, change MIDI channel turn on/off system exclusive as if all was normal.
Then, suddenly it stopped and I was back to the limited selection, most parameters not working but still able to make a few choices.
So I now believe I do have a functioning unit, yet something is still wrong.
I'm going to try to repeat the last setup and see if I get the same results.