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I have a Mitsubishi vs-4543 projection tv that when powered up, there is the normal click and the green power light comes on. However the screen just recently flashed white with a blue,green, red line through it and then went blank. I can still use the remote to change channels, volume, input and I can hear sound. No picture at all. Won't show movies at all either.
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Check and replace the main power regulator [SMPS] board to your TV. Contact any service technician, or the authorized service center for Mitsubishi. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy. http://electronicshelponline.blogspot.com/
is that wavy in vertical motion? and bending? in that case maybe
you have low voltage in your power inlet! or can you specify the color
of wave and motion, if horizontal or vertical?
2 THINGS CAUSES THIS PROBLEM ON THESE --- THE BLUE PICTURE TUBE HAS LEAKED FLUID ON THE CIRCUIT BOARDS ,,,THAT 'S BAD
AND SOMETIMES ,WHEN THE VERTICAL CIRCUIT GOES OFF ,,THE SCREEN WON'T LIGHT UP ,,,THAT NORMAL ,,,KEEPS FROM DAMANGING OTHER PARTS
U NEED A TECH TUNICA
That is a VZ3 chassis, similar to Mitsubishi models Ts-4545, Ts-5045, Ts-5545, Vs-4543, Vs-4544, Vs-5043, Vs-5044, Vs-5047, Vs-6043, Vs-6047 and has common failures in the vertical circuit, specifically vert Ic401 which is a La7845 which is usually caused by defective C402 100uf 50v and/or open 1.2 ohm 2 watt R510 next to FBT.
If not that check C268 off Q215 on signal board 22mf/50v and Ic200 on signal module Cxa2025s. However the vertical failure is more likely.
Bill
I usually find that symptom you describe is caused by cracked solder joints on the power regulators or vertical output IC. I have also seen that symptom caused by loose solder joints on the vertical windings up inside one of the yokes. If you have experience in repairing TV's then you can disassemble the set and pull the main chassis, flip it over and resolder all of the parts mounted on heat sinks. If you do not have experience in repairing projection TV's then allow a qualified tech to handle it for you.
Most likely the convergence output IC has shorted out and has overloaded the convergence power supply, which has stopped working. The computer senses that the convergence power supply is not running and shuts the set down. The convergence IC should be replaced, the power supply restored and the convergence circuits realigned by someone experienced in Mitsubishi projection sets. When I do a housecall for a set like that I charge $150, but shops in your area will vary so ask around.
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