Re: Backlight issue LG 50ln5600

Ya. Doh, doh. I was not up to speed on this still. On my Samsung schem, the data pins--p1,2,3(A0,1,2) are really logic inputs--not data inputs-- for like chip enab, output enab, write enable-- so SDA is serial data input and SCL is the clock for that--all that's needed for read/write.

So--eeprom IC IS normal (24c256)-- but you can either replace IC, get upgrade firmware from LG, or find .rar file on internet. Sometimes repair kits with eeprom are available on internet/ebay. I doubt there's memory for this file in CPU on board.
...

Re: Firmware eeprom LG 50ln5600

Well, for 50LN5600, LG.com support has no software upgrades available, either. It means if no upgrades, then no software file available there.

Seems strange that data pins are grounded on this samsung:



I would just find a used bd on ebay or something. Just saw one for $28. /free ship.

Re: Backlight issue LG 50ln5600

Agent24: Shane711:
Yes. 27k is no good. Although I had a hard time reading that small print. Yes, I kind of posted hastily-should have tried a little research 1st. It's been a long long time since I delt with CPU bd. schematics-in fact on TVs, since microcontroller ICs, but mostly non-TV specifically designed CPU digital electronics applications.

So I checked some bds.
I have a samsung that has a chip near what seems to be the TV micro. It's printed 24H01RP-(sp).
On a samsung main schem, I find the TV micro eeprom as...

Re: Backlight issue LG 50ln5600


Shane:
I believe the eeprom is IC2405, very near the power connector. I don't monkey with ICs on these surface mount bds. normally. But from my past experience going back to '80s and '90s., serial eeproms that are cmos design will start with a 4 with 3 more digits for serial eeproms. I have a 50LN5700 here and IC2405 looks like it's printed 4327,(used to mean 27kbytes/cmos.) Before 3.3v system op. voltage times, they were 5v ttl serial eeproms starting with 74xx. xx for kbits/bytes, can't recall bits or bytes. There were also ram and...