Tv blue light comes on but no picture - Hitachi 42HDT79 42 in. Plasma Television

I have a toshiba 50hm67 tv and with mine the blue light would come on and I would hear sound first and then the picture would finally come on... this happend for about a month.... next the yellow and blue light would come on but the pic still wouldn't come on until it clicked off and on by itself for about 10 min this went on for about a week. All of a sudden last night the red lights by the power light started blinking. No tv now and when the tv shut off it said lamp not working.

there is a psu fault ...usual some of capacitors r over ...need to swap by profesional

my first question is have you checked the bulb. the loud pop sound like the bulb blew and the rattling sounds like the lamos trying to fire. remove the bulb cover and unscrew the bulb

THIS PROBLEM HAS HAPPEN TO ME WHEN MY LAMP WAS
ABOUT TO DIE. WHAT I DID WAS UNPLUG THE TV SET FOR
A SHORT WHILE, THEN WHEN PLUGGED AGAIN IT CAME ON BUT THE PICTURE WAS DIM AND THE LAMP ONLY
LAST FOR FEW DAYS AFTERWARDS.
W.J.M.

how do i fix p50h401 blue light no picture and sound

Press the reset button...it's on the bottom to the right (underneath the TV). Same thing happened to me.

My LG TV
switch on no picture but short period of sound then nothing

you are experiencing one or more of three things
1.the crt itself is damaged
2. the vertical ic on blue crt board is bad
3. the focus block is bad
if you hire a sony authorized technician they should be well aware of this problem.