Tv turns on but no sony logo then shuts off. Blinls red light 5 times

@santanaj not sure why you would have changed the power supply board. The 5 blink error code can have quite a few different causes. Ranging from the T-con board to the panel and few things in between.  Start off by removing the cables between the T-con board and the LCD panel. See what blink code you get. Then turn your TV off and connect the right cable only. Turn it on and see what happens. Do the same with the left cable. Always turn the power off before switching. Let us know what you find out. This can be a T-con board error but it can also be a Side driver issue on the panel.