my sd1 have weird clicks, about 2 per second coming out of all outputs. most of the times it happens when I access the HD but sometimes it just stays there.
I don't remember having this problem before but it certainly got worse since I upgraded the eprom. I might have touched something when I replaced the old eprom. any idea?

Hey!
Check the ground conections between boards...maybe it's conector loose...maybe you should use a Ohmmeter to check all the wires and conectors.Also, strange sounds can apear when the mic in 1 and 2 are 'in air'...with max volume.try to set mic volume to minimum from the keyboard and the one outside.
Vio

Thanks Vio. sorry but I tried everything with no result. I had to send it to the Ketron lab. They said there was a problem with the output circuit. they fixed it for 150usd.