Akai LCT2715 power supply repair?

[rca2000]

YOU need to see if your backlight is working. It likely is powered by that 24 volt source. If you have that and the BL is not working...you need to know is it is being "turned on" by the signal board. There should be a "bl on" or such pin on the board. It must change when the power is turned on, like the power pin. There is likely ALSO a "dim" pin. it ALSO has to change--or the BL will NOT come on. If BOTH of those seem to be there....and your 24 volt source is on to the BL inverter (IF this set uses one)...you might have a bad inverter.

ALSO...take a light of some sort--and shin is RIGHT at the screen...after you turn it on. See it there seems to be ANY sort of activity there, like a menu or source indicator..