JX-8P freezes

[petermorck]

Hi all, I'm new here and was wondering if you could help me with something.
I have a Roland JX-8P that one day just froze on me, like the display stopped updating and nothing worked. So, I switched it off, waited a couple of seconds and switched it on again. It passed the keyboard calibration and worked for about 5 seconds, then crashed again.
I suspect something is overheating because I got the feeling it could run for a little longer if I left it off for a while before trying again. Powersupply gone sour and supplying bad voltages?
I know this could be just about anything, not just power supply, but does it by chance sound familiar to anybody?

I'd rather try and fix it myself than leave it to some repair shop. While not being a genious in electronics I did take Electrical Engineering classes in college for about a year before I switched to Computer Science so I know the basics sort of and I can handle soldering irons and oscilloscopes, although I have none
There's no rush with it since it's just taking up room in my closet at the moment but in the event I'd like to use it again it would be nice to know how to fix it.

Any advice?

[petermorck]

By the way: I am from Sweden so if any of you US based techs reply you don't have to worry about lost income. It's not like I would ship it over there to get it fixed anyway

[rhino]

let me find my JX-10 schematics... there are test proceedures that may work on the JX-8.
basicly, the assigner board waits for a 'ready' signal from the voice board... if the synth freezes on the welcome screen, chances are the voice board is not returning this signal. there is a way of powering up in a test mode that will by-pass this and give you indication if one of the voices has failed.