Got this Philips 14" B&W tv ages ago. Symptom : Video muted with no sound. So where would one start? I was thinking maybe tuner section or IF. Turned out the speaker was shorted, the volume was set to high, hence supplies were dropping due to an unnatural load. Disconnected speaker wire and voila, picture was restored. Recoiled the speaker and everything worked fine. Jango.
16 years ago