Lost picture - volume works -

No backlight. Check and replace damaged component/s at its backlight inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts. Do a search by type in the brand name of your device at its search box.
http://electronicshelponline.blogspot.com/

Change input device to some other which you know works for sure. If problem persists, try changing the channel. If you notice same problem, this may need attention by a qualified service technician.

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 ?

Fuzzy,blury picture in CRT tv tube.Tv in long use not repairable.Tv tube is dying,it junk.

Has The screen Completly Blacked out Buy a New Screen

you probabily need to change the input, find the input button, when you hit it you should get a box on the screen, with inputs, highlight diferent ones and hit select- untill you get pick back, thats what my sugestion would be

did you check the control board on the back of the TV there might be a blown capacitor that could be replaced like on the polaroid ones found on this site. pretty clear info on that tutorial and could work on this one too

Hav 50 inch lg no pic but got sound wtf how do i fix it an there r 5 flashes b4 green light stayes on at the start

Well if you have anyway to get in to the menu of this set you have to turn the closed caption off, It is turned on to "text 1" and this causes this problem

Do you have a VCR or DVD recorder? If yes, set it to record what you are watching. After a "blackout" rewind the tape and review it. If there is a blackout on the tape, the problem is the sallite box, if not, it is the TV! QED