Techwood 42 LED 17MB65-1v1 - Jak naprawić migającą czerwoną diodę?

Hello
i am new in this forum and i hope i can find some help,
well i have a problem with my tv .
Techwood 42" LED fullHD
board : 17MB65-1v1
panel : 42_LG_SDV1_169FHD
the red Led keep flashing but before this and since over a month the tv stops saving settings like channels ,sound settings and video too.
so i tried to flash it with a firmware i download ,in fact it belong to a sharp 40" with a closer board 17mb65 v2
now i'm stuck .can somebody help me with the real firmware
Thanks

Ok for you problem test the power board

thanks for your reply,i already the power board,all the outputs ok and even the main board 17mb65 works fine because after i flash it the tv now save sittings ,no led blinking or sudden shutdown.
in fact the bad move i made is DO NOT MAKE A BACKUP OF THE EEPROM that's why i'm stuck looking for the original firmware.
i found a turkish site :Aby zobaczyć materiał na tym forum musisz być zalogowany but i don't know how to get an account.
thanks again

Help for Grunding 40vle2012 firmware

Hi
motherboard & panel