Hi albert, thanks for the quick reply, I'm pretty knowledgeable with electronics but need some help here with locating and testing a ' no-load condition on secondary of t4101' thank you very much for the reply, Mark Klein Help make your TechAssist online repair tips database better! Submit your fixes here: http://www.circuitwork.com/techassist/tip/#tips To unsubscribe write to: techassist-request@xxxxxxxxxxxxx with unsubscribe in the subject line.