Samsung LE32C450 stuck in standby

[PowerAmpFreak]

Hello folks,
Time for another Samsung stuck in standby.
This time it's a LE32C450 using the same Samsung PCB as a earlier story found in this thred:
https://www.badcaps.net/forum/showthread.php?t=26166

PCB = BN41-01331B
TYPE: BN94-02699

Powersupply provide standby supply of +5.2V. No reaction on either remote or front keys.
I begin to believe there is a firmware failure to those boards.
Main EEPROM IC501 is not powered up during standby so no use trying to reset.

[vinceroger69]

Re: Samsung LE32C450 stuck in standby

of another forum might be worth checking not coming out of standby etc
Check the solder joints on QB802 on the power supply board (a T0-220 packaged mosfet). I have had two TV's in for repair that have had this fault.

[PowerAmpFreak]

Re: Samsung LE32C450 stuck in standby

Sorry, too fast posting to the forum.
This was actually not related to mainboard. The powersupply didn't provide PFC controller supply voltage so the rest of the powersupply didn't start.
Fault was a bad TL431, now set is repaired!

[shrad]

Re: Samsung LE32C450 stuck in standby

hi,

I could have the same fault

any chance you can tell which one you replaced? I have to check for them but if I had an indication it would be faster

thansk a lot

[angel-boy]

Re: Samsung LE32C450 stuck in standby

i have a tv with stand by led on , i flash the eeprom , still the same,

at ic207 i have 5v in and 2.5v out, for few seconds, power sourse make a click noise and no power, in less that 1 second, i have 5v , and off. is restarting.