check the reset pin for a solid 5v, look for hash on the 5v B+ line, and check the oscillator stability on the micro./ Jim McVey McVey Alltronix 327 Broadway Newburgh Ny 12550 ph: 845 561 8383 fx: 845 561 9017 Consumer electronics & computer service. Factory authorized for over twenty brands. ----- Original Message ----- From: "Art Bevilacqua" <abevilac@xxxxxxxxxxxxx> To: <techassist@xxxxxxxxxxxxx> Sent: Wednesday, May 19, 2004 9:25 AM Subject: [TechAssist] FW: Panasonic CT27G14A, Chassis AP330, (NA6DV), Vertical, sound and OSD problem > This set is driving us crazy - it came in because vertical would pull in > after the set was warm. We also observed that after running a while, the = > on > screen display would break up into "hash", sprayed across the screen, = > and > sometimes the sound would go all the way up. When the sound would go = > wild, > we would loose control of the set through the front buttons until the = > set > was unplugged or cooled down. > > I replaced the microprocessor and it ran for three days only. My father = > has > been heating and cooling (and replacing) other parts in the micro area, = > such > as the eprom and the combo filter chip. Still, heating and cooling = > almost > anything in that area causes the problems to come and go. > > I discovered that heating and cooling from the bottom of the board also > affects things, but I haven't been able to isolate it to a single part. > Everything has been resoldered. There are not any glue deposits under = > there > that we can see. > > Has anyone experienced this with one of these before? Thanks, > > Art Bevilacqua > Essex Radio and TV > 40 Main Street > Essex, MA 01929 > > > > > > -------------------------------------------------------------------------- --- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > http://www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: http://www.freelists.org/archives/techassist/