Blue and red screen - Mitsubishi WS-55613 55" Rear Projection HDTV

Cheaper to replace than fix, trust me on this.

Sound like your Y-Sustain board has one foot in the grave. The Y upper buffer and Y lower buffer boards go when the Y Sus Goes too...

protron pltv-27 cm screen lights up then green comes on and turns red no signal.

Your tube is failing.

you need to adjust the red screen control of the crt under the speaker grill turn it down with the tv running.

My Advent TV did the same thing. Blue Screen with a red lock in the upper left corner. Just press and hold the display button for about 10 seconds. It will clearn

yOUR CRTS ARE SHOWING THE SIGHNS OF WEAR. ON THE FRONT OF THE SET BEHIND THE SPEAKER GRILL OR FRONT FACIAL. THERE ARE 6 CONTROLS 3 FOR SCREEN RED GREEN AND BLUE AND 3 FOR FOCUS RED GREEN AND BLUE. YOU CAN TRY TURNING THE RED SCREEN DRIVE CONTRIL COUNTER CLOCK WISE. JUST A VERY LITTLE BIT.

go to avs forums - you may have blown capacitors

Red and blue present, but no green = bad green CRT is
best guess.Remove lower front panel = adjust screen and focus
controls for best pix..................T.

does it have blue video image?