Vertical IC does not work.
Good evening, the title does not make sense if one reads the text of the question ... It is simpler if for example he asks for replacements for the LA78040, several can be used for example the LA78041 for which he mentions ... Now we must see How many inches is the TV, if its fault persists, it must mention at least the chassis, then that way it will make more sense to assist and tell you promptly which diode or resistor to renew or where to measure ... (R301 / D301 / C301)
The colleague is right. You would know how many inches your TV is and could also solve and change filters to avoid extra breakdowns.
those chinese tv, they all have the same circuit, the same ic, the same source, the same c, it is 1000uf x 35v, the one with 100uf x 50, they are all just like that, the flayback changes a bit, but I found one with the la78041, in vertical and does not want to open, it has 26v in leg 2 and 5 in the last, all those chassis bring the same design, regardless of the inches
