eppendorf 5810R board diagnostics

Error 6 has numerous causes, this unit was working until moved, now it's all error 6. Temp control works fine. Does anybody know if the service manual is worth the $$? I don't want to replace the freq conv bd if I can see a work around. I have several other svc manuals for eppendorf, but the tech support folks are so unhelpful, that I may just recommend replacing unit with another more servicable brand.