Samsung LE32R73BDX LED flashing - Caps changed

[nogger]

Hi all ,got a slight variation on the theme of RED led flashing & relay clicking on a Sammy LE32R73BDX & wondered if any had seen this before/had any ideas?
(PSU is : BN96-03775A)

Caps in the secondary have been changed & voltages checked on loads but when put back into the chassis the LED just flashes once a second immediately power is applied ,(doesnt go to steady standby first). Unable to put the set into SERVICE mode (INFO>MENU>MUTE>POWER) because it's not going into standbby when power is applied, it immediately flashes the red led.

Is this an EEPROM issue guys or anyone got other ideas ?

Thanks in advance.

[Scenic]

Re: Samsung LE32R73BDX LED flashing - Caps changed

replace 256kbit eeprom on mainboard. ripple caused by bad caps kills the eeprom or corrupts the data (all the user settings). TV tries to read the corrupted garbage, can't make any sense of it and halts. (or it can't read it at all because the eeprom is unresponsive/dead)

a 24C256 is what you're looking for. Usually an Atmel near the CI card slot on the solder side of the mainboard.

Labelling on the chip might be not what you'd expect

one my samsung, the chip said
ATMLH834
2EB 1

which means that it's a 256KBit 2-wire serial eeprom (24c256b)
https://cdn.badcaps-static.com/pdfs/...4bbddfe6a9.pdf
Page 14 (Part marking scheme for SO8 aka 8-SOIC) fits perfectly.

instead of buying a new eeprom, you could also overwrite it with all FF's (= zeroes) if you have the programmer and the eeprom isn't actually dead.

first powerup with the new/nulled eeprom will take considerably longer than normal (rewrites default data to the eeprom before starting)

PS: fun fact: a lot of samsung LCD TV's (2007/2008 and newer) run a miniscule linux

[comptek]

Re: Samsung LE32R73BDX LED flashing - Caps changed

try changing the chip mounted on the heatsink its got the metal shroud / clip on it had that go before

i think you need some heat compound on the new one
the ic costs about £3-£4

[ReeceyBurger123]

Re: Samsung LE32R73BDX LED flashing - Caps changed

try changing the chip mounted on the heatsink its got the metal shroud / clip on it had that go before

Gary this thread was from 2011 lol and very common symptom on these ic thats Ipm failing.

[comptek]

Re: Samsung LE32R73BDX LED flashing - Caps changed

thats wierd it was under posts for today! well yesterday ?? strange i keep getting that oh well never mind lol