Sharp LC-32D30M-BK: Brak podświetlenia po 5 sek., standby, płyta RUNTKA419WJ

hello colleagues
need service manual for sharp LC-32D30M-BK problem is
set work normal for 5 second then no backlight after 3 second again
going to standby
power and inverter in one board have this number
qpwB0 RUNTKA419WJ
any one have experience with this fault?
any hint or suggestion r welcome
thanks in advance

You need check inverter for backlight lamps, probable demage one HV transformer.

hello
problem solved
https://www.elektroda.pl/rtvforum/topic1839077.html
and see
https://www.elektroda.pl/rtvforum/topic16761-180.html#9530560
kind/regards