Nidek YC 1400 ophthalmic YAG laser ERROR 10

Initially I was getting Error 12 sporadically on start up and during use. The bank voltage measured 835v I reduced it to 725v and the unit did not fault on start up and error 12 was gone. But now I get Error 10 sporadically during use. I adjusted the bank voltage up and down incrementally by 5v then 10v (going as low as 710 and as high as 730v) trying to find a sweet spot but no luck. I watch the voltmeter as I fire the laser. The bank voltage drops momentarily after each pulse, occasionally by as much as 300v without faulting. It will fault to error 10 when it drops even lower. Anyone have any ideas? I adjusted bank voltage using trimpot at VR3. Is there another adjustment i can make elsewhere to remedy the error 10? My biomedical engineering expertise is very limited so if you are able to help please keep that in mind when replying. Thank you much! Also, anyone know where I can get parts for this laser if I need a new power board, etc?