Yamaha DX7 IID Repair (Battery Replacement)
4:25
How To Program a Yamaha DX7 IID (Load Patches/Presets via MIDI on Windows)
16:42
How to Fix Your Yamaha DX 100 Screen
8:29
Roland D-20 Repair
16:40
Ensoniq SQ-80 Key Upgrade
12:07
How to load Yamaha DX7 synthesizer patches and demo of aftermarket patches
5:03
Yamaha DX7 Synthesizer how to open case to replace battery
54:36
Repairing and Refurbishing the magical Akai AX80
7:05