You should never break a horse to ride before it is at lease 2 years old!!!!

Go to menu turn color control off see if you have black&white picture if not then ,red ,green,blue drives need to be realined set to or as close as you can get to black and white tracking ,then turn color back on see if this helps. You have screen and focus control drives adjust screen … Read more

You have something shorted it could be hori output, rectifier diodes,and these sets have pico fuses which look like resistors but they are fuses 2.5 amps up to 7amps. Also big fuse resistor 2.7 ohms 10watts.

Replace your front screen plate it must be separating

You will have to replace STK392-110s you might have 150s upgrade with the STK392-180s, next is getting factory menu settings to regain convergence. I am still looking for correct factory settings for Panasonic PT-51HX40b chassis BP819 does anyone have that?

Turn color off on menu then see if you have a black and white picture , if not turn to adjust red,blue,green screen drive until you see a black and white picture, all 3 tubes should be close to adjustments to get this after you have bl&wht turn color back on.

Your blue tube is bad .there is no replacement tubes you must send your tube to tucker georiga video repair.