Thank you, Darren, tnmshd!
I really forgot about the video out connector. Will also look at it as I hope additional information from this may give some points to think but unfortunately it doesn't say anything about solenoids based on the description.
But I also found the LED status description in the service manual (p.122+). But it will require to open the units again. Especially the solenoid one which is a bit of a pain (the right one. I think the centre one would be even more as it asks to dismount the pedal unit and all above it)).
On Tue, Jul 11, 2017 at 5:40 PM, tnmshd@... [disklavier] <disklavier@yahoogroups.com> wrote:
>Have you plugged in a monitor to the video out port?If you refer to the service manual it will tell you how to get into the test mode using a USB keyboard, from there you can access a lot of test information.No.It's the way to enter I/O center test mode.Normally you will enter Maintenance mode using PRC.If the PRC or media center is broken, take that way.Service manual and maintenance hand book are required for tuner.