lcd led tv power on | lcd led tv repairing fault
If power supply ok then first you have to check 5vsb,A5v .in same case instant of 5v ,12v is come
[1]case first if 5v is come:-
1. 5 vsb voltage first voltage which is out from power supply
2. it goes to motherboard then in motherboard 3.3v and 1.2v is generated it goes to main processor ic same case 1.8v is also come for ram and main ic communication.
3.if any one supply is missing like 3,3v ,1.2v ,1.8v then stand by is not release also RAM and main ic communication low resistance is open then also stand by is not release.
4,if software is corrupt then also stand by is not release, main ic is not ok but all voltage and software is ok then stand by is not release
[2] CASE SECOND 12V IS COME:-
1. 12 vsb voltage first voltage which is out from power supply
2. it goes to motherboard then in motherboard 5V,is generated. using 5V then 3.3V AND 1.2V IS generated goes to main processor ic same case 1.8v is also come for ram and main ic communication
3.if any one supply is missing like 3,3v ,1.2v ,1.8v then stand by is not release also RAM and main ic communication low resistance is open then also stand by is not release
4,if software is corrupt then also stand by is not release, main ic is not ok but all voltage and software is ok then stand by is not release
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