PTV MOdel VS4517S customer said had a high pitch squeel, fired it up and saw C4A29 bulge and smoke, replaced it and checked all around Q4A02, 03, 05 all ok, diodes in area ok, fired it up , and the cap blew again, this time shorting Q4A02, and 03, replaced them both and Q4A05, C4A29, and 4A25 ( from tips ) now I'm a little gun shy about fireing it up agian, anything else I need to check, would the fbt cause this ? can't ring it, was wondering if the Q's were weak ? appreciate any help, I've no print brock Brock Electronics R.R.4 box 237 5208 cr.3385 Independence Ks. 67301 620-331-0235 fax 331-7191 markbrock@xxxxxxxxxxxxx Zenith*Philips*Peavey*Fender*Crate we work on all brands,makes,models of anything that plugs in the wall ***************************************************************************** Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/