Diag is not going to get too far without anything lighting up - it is as though no power is coming from the PSU PCB - yet the power light is on. It is possible for everything but the power LED to get power.
I have asked the seller what the history is - that may shed some light - otherwise I'll have to go in and see where the power is and isn't.
From: "Daniel Forró danforcz@... [CZsynth]" <CZsynth@yahoogroups.com>
To: CZsynth@yahoogroups.com
Sent: Friday, 23 October 2015, 13:24
Subject: Re: [CZsynth] AZ1 repair
There's also diagnostics mode described on the page 27 of Service manual.
Daniel Forro
On Oct 23, 2015, at 9:11 PM, templarser@... [CZsynth] wrote:
Dear all,
Just taken in an AZ1 with one broken key and 'power light on but no one home' - anyone have any experience with these keytars in a repair context?
LEEMessage
Re: [CZsynth] AZ1 repair
2015-10-23 by Lee Borrell