gentlemen of the community of yoreparo very good afternoon here again needing your valuable collaboration I have a tv lg ultra slim model 21fu6rl chassis cw81b which yego off and had burned the vertical output la78041 is replaced by the la78040 and stuck with the colors very opaque reactivates the screen and he and the tv remained dull the screen flayback and seve the screen but I connect the signal and you do not see anything only you hear the probe audio in another screen and the card does the same subo screen and it looks with little brightness when connecting the signal does not see anything probe the the screen with another card and the screen is good it is changed vertical again the capacitors of the side of the flay the memory eproom revice the 180v and they are well it revice the reclencias of abl the filament and everything is well + b has 114v the vertical has on the pn1 02v on the pn2 30.3v on the pn3 31.2v pn4 0v pn5 0.6v pn6 31.7v pn7 2.3v if anyone can guide me with this fault I would appreciate it a lot since I am new to the subject Thank you very much in advance.

A friendly greeting, I suggest if you have the diagram can guide you to get to the solution of the problem. The companion francisco gives a guide and is referring to the abl (automatic limiter of brightness) should start to check the line that leaves the flyback I think it starts with a filter and follow the line that will take you to the integrated jungle, the elements that are in that line, if all is well may happen that the jungle is defective or may be that the flyback screen is defective, in that path you will find capacitors, resistors and diodes, I think the abl leaves of the pin 8 of the flayback I do not know if in that model out of there anyway on the printed circuit this, I hope you help this guide and comment results so you can continue guiandolo

hi colleague: some suggestions to the contributions of colleagues ... the tension for the vertical is high ... should be in the 25v ... maybe not working the vertical and only sees a glow on the screen x the horizontal deflection ... prca xa / v with a dvd and comments if there is imajen ... also measures on the (pin49) of the lc501 if recive the 8.5v ... if there is imajen with dvd is xq, it works the vertical ... fixate if the vertical takes temperature ... also comments q, voltage you have in each cathode of the tube ... generally can walk between 130v and 150v ... move the focus adjustment and see if there is any change ... have checked the contrast and brightness from the remote c. .? ... comment ... greetings !!

test the voltage of the abl directly in the jungle pin 45 3.7v if you do not have that voltage you have something broken down the road, comment your tests, comment also if you have osd