Screen zipped down to dot of light in center and went blank. No audio either

Hi Richard, The link below is a YouTube video showing how to fix a Samsung television NO picture GOOD sound, Also there's videos down the right side of the link that may help as well........CHEERS..
https://www.youtube.com/watch?v=Bf5T2wwtydY
LG No Picture Screen Flash 47LN5200 47LN5400 47LA6200 47LN5700 47LN5750...

Read the following:
http://blog.coppelltvrepair.com/2011/02/hp-pl4260n-suddenly-lost-picture-how-to.html

Different TV, but most likely same problem and, in fact, quite possibly literally the same boards, so maybe practically the same TV.
Can't be sure since you haven't posted the model of your Viore.

If you have specific questions, please always include the model number in the question...the model is on a sticker at the back of the TV, right after or below the words "MODEL:" :-)

loud pop then no picture. still has sound 50 in samsung plasma mod s50hw-yb02

2 things that will cause that vertical IC or Yoke! Listen to this one went on service call 2wks ago Customer had a 50 INCH1988 pioneer big screen replaced 3 capacitors resolder poor connections TV is now working like New ?

first try to reattch all coneection to your televison.
then open the back side cover of your tv then reattch all connectiuon there .
Also clean dust from all circuit.

Sorry. Your screen dies.

replace q502 a T504
H.O.T/ and flyback.

parts cost and labor should be about $190

Try to replug everything in the TV. Before you turn it on. make sure all plugs in the TV to the wall is plug in tight. When you turn your TV on hold the power button down to see if it resets

If your projection went down to a single dot in the center then you are most likely at the minimum replacing all three projection tubes due to that dot. It will leave a permanent mark in the center of each CRT and not repairable. The cost on that old set aren't worth it.