does anyone know the details of the modification?
I’m not 100% sure, but if it is what I think it is (when opening up one of my SP’s), it looks like a grounding wire is installed from the back of one of the front panel PCB’s to one of the corner screws holding the PSU board to the base of the chassis.
I could be wrong.
Regards,
David Smyth
NZ
Just contacted Moog support and they gave me the details of a qualified engineer that has dealt and is familiar with Moog Products in the past, so hopefully I can get this all sorted out!
I did the same, contacted the service center that Moog recommended, and got back a very friendly reply that I should use a D.I. box. 
I don’t blame the local service center, because they never heard of the problem apparantly. But I am quite frustrated that Moog recommends me to contact someone who will solve the problem, but doesn’t know how to solve it!
In addition, “we cannot regulate the pricing of international service centers, so I can’t promise that this work will be covered under warranty.”
It seems kind of strange that I have to pay for Moog’s design errors.
(As a comparison, I know that when Roland had problems with their ‘Ivory touch’ stage piano keys, they renewed the keys of all of the pianos with this problem for free.)
So, finally there is a mod. There had to be an internal workaround. I had a LP Stage II. Fine in the studio but random dancing lights and no control of parameters at random stage events. Eventually I got rid of the instrument. I will probably buy another one, once this is taken care of. Regards, Sid
Are most of you having these problems outside the states? So far, I’ve only played 2 gigs (in the US) with my SP, but it’s been fine so far.
I’m having my SP problem in New Zealand (haven’t taken my SP’s anywhere else). But for my problem at least, I think it’s too early to say if the country’s power format (v, hz) is a cause.
Will update with info after some more testing..
Regards,
David
NZ
I have posted an update to the modding/testing here:
http://forum.moogmusic.com/viewtopic.php?f=7&t=13563&p=102526#p102526
Regards,
David Smyth
NZ