lcd sansui 3211

[willyam1]

hi.
problem is backlight on and of after a few sec.
and 24v on/off.
notice that even when tv in stby all voltage come out frome p.s the pin pson is allways 4.45v in stby red led by power it cange to green and after a few sec backlight is on and off on and off.
power supply is megmeet MP116T.
MAIN BOARD IS T.MS6M181.1B 11223.
I enter to factory code;menu and 1147.
rhere is no reseet to eeeprom.
any idai?.
wiilyam

[dkneyle]

Re: lcd sansui 321, MP116T power supply

I had this very same issue in a badge-engineered Chinese set (Bostton) that used this power supply. It appeared to be heat-related (only once the power supply was up to temperature did it emerge). I replaced every component that was accessible and possibly subject to thermal stress. All electros, FETs, high watt resistors. Still same problem. I bit the bullet and bought a new replacement board out of China for about $25. Problem Solved.

I'm posting this to help others who might be encountering this problem. I assume it is probably a SMT IC on the soldered side of the board causing problems?

On other posts related to this problem I saw a claim that it was the inverter causing the problem. No, definitely a failed PS issue.