Picture brightness too low

Tom, Have you also attempted to clean the mirror as well as the inside of the screen? Focus as well as brightness issues can arise due to elements on these components as well. I would imagine you are having trouble with B+ V if this is not the case. Also if you have a HV probe you should get the service manual and check each flyback as well as the individual drives. Not familiar with Panasonic s method of return loop but if the voltages are wrong somewhere it will greatly effect performance of the circuit. Hope this helps. :) I smoke and have to clean mine regularly.