If the thumping sound is coming thru the speakers, look and see if this set uses an upright regulator on the power supply G board. (There is a small black flat square upright pack behind it.) TO-220 case with about 7 pins for the 9VDC regoutput.I'm at home so can't be exact. I have changed several of those for that. Phil Phil Bader, Pres. Jan Phyl TV Inc Winter Haven, Fl (863) 299-8821 estab. 1976 ----- Original Message ----- From: Ben Daniels <bens74820@xxxxxxxxx> Date: Wednesday, July 20, 2005 3:00 pm Subject: [TechAssist] Sony KV-27FS12 chassis BA5 thumping sound > This set had D513 bad in power for verticle -15 volt > source. When you turn on now you have reduced b+ with > thumping sound. Disconnect H/O transistor and the 130v > comes to normal with good drive wave form and > voltages. Anyone had this before? I am thinking maybe > hvt??? Thanks Ben > > Randy Daniels > Ben's TV Repair > 123 Arlington St. > Ada, Okla. 74820 > bens74820@xxxxxxxxx > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > ------------------------------------------------------------------- > ---------- > This Email List is Public. Remove: http://www.tech- > assist.org/remove.htmSet Vacation > mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacationLost Password: http://www.tech-assist.org and select "Login Problems?". > Email Archives: //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- This Email List is Public. Remove: http://www.tech-assist.org/remove.htm Set Vacation mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%20vacation Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/