Ensoniq ESQ-1 boots to self-test, but keyboard, MIDI and sound all work

[Didier]

I had a similar experience, which I described in the following post last May :

Ensoniq ESQ-1 : Successful repair of dead keyboard

Hello, I wasn’t as lucky as you. The unit on my workbench was stuck on the second startup screen. None of the panel buttons had any effect. However, in the Keypad/Display board’s self-test mode, they were recognized. The keyboard wasn’t working either, but my ESQ-1 was working via MIDI. After some discussions with Rainer Butchy, we strongly suspected the 6500/11 Keyboard, for which there is no clone. Fortunately, I had bought a disassembled ESQ-1 for parts some time ago. Replacing it with t…

I am at your disposal if you need further information !