I push power and there's a loud "thump" from the speaker(s) . I know that upright mounted sound board can have one or both audio output ICs shorting and stop the set from running. (I did measure CR4118 and had about +14VDC, so OK). Question: is there a simple way to temporarly "isolate" the sound board for testing the set other than completely removing it or the two outputs? A certain plug assy removal? Phil Bader -- Philip Bader Jan Phyl TV Inc. (estab. 1976) 3420 Recker Hwy. Winter Haven, Fl. 33880 Fax (863) 299-8821 email: tjanphyl@xxxxxxxxxxxxxxx -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 1/10/2005 ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/