Never worked on this Chassis before, relay clicks but that's it. Found D866 (O4AZ30Y) shorted tied to 2 legs on voltage regulator Q801( STR-S5241) suspect it is gone as well. Checked horz.output along with other items on chassis all Okay. Do not have a value for D866 and is there any other parts with this set I should replace or check for this fault before replacing Q801and,D866 powering up? thanks Albert Albert Walfield's Electronics Bridgewater Nova Scotia CANADA 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.