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Blind Factory Reset
Before trying to EEPROM reset, please try a factory reset, that might revive your TV also.
Press "EXIT" button for 12 seconds (15 is better since you cannot see TV), than press "Left" and "Enter"
Samsung Documentation
This wiki entry will not help resolve a TV bricked by firmware flashing.
One example (from the original post of this wiki):
This is Erdem. As I bricked my D series device by miss service menu setting, I search for solutions to recover it.
After with help of Juzis we unbricked device with the same way of C series TVs... Here I wanted to try to let
you know how the process is working. Firstly, this hack doesn't work if you bricked you device by
firmware flashing... This hacks just removes service menu settings and let you give another chance
to fix settings... Also you needed to find correct values for your TV after resetting NVRAM like
Model / Type / Tuner / Font Color and others. It's better to have screen shots of your service menu.
You can also ask help from our forums.
EEPROM
EEPROM is a short of electrically erasable programmable read only memory, which is actually a chip. There are several EEPROM chips used in Samsung TVs. All service menu settings are kept in the so called SoC EEPROM. You can delete and reprogram this chips millions time. So they are fast and reliable...
Reseting NVRAM (EEPROM)
For resetting TV, settings, you needed to remove SoC EEPROM device from TV. But it's not required. In electronic world, if you disable communication of the chip, it counts as removed. So we just needed to kill communication of SoC EEPROM. EEPROMs on Samsung TV's communicating via common i2c protocol. That protocol carries data via SDA line and send clocks via SCL line. In our situation, both blocking SCL or SDA will works. But I decide SDA.
To do this, all you have to do that feeding (connecting) GND (ground) or VCC (3.3v) to SDA line with little wire... That's all. Since this lines are HIGH (v3.3) in IDLE, its better to hold it via VCC. You can also hold this lines via GND too. But don't try to connect both GND and VCC. It will be short circuit and probably will damage your board.
Join VCC and SDA, power on TV and hold about for 20 seconds with the TV powered. It just try to read (wrong) settings from EEPROM, since it cannot read anything (refer to the warning message bellow), just start with defaults. That is what we want. Than releasing SDA line and shutting TV off will update the settings on EEPROM with null values, that TV could boot with it. After all, you can enter service menu and change the required changes.
UE40D5000 Reset message
Where do I find the SoC EEPROM chip?
Its located near CPU (SoC) at C and D series. On top, it writes some numbers and letters starting with 24256 or 24512... Here I place some screen shots from D series bellow. In my TV, 24512 EEPROM chip used. You can get the 24512 Chip Datasheet here. In picture, white triangle shows the first pin.
B Series SoC EEPROM Location
LExxB550
You have to search for eeprom on back side of mainboard. IC3001
B550 mainboarboard front side B550 mainboarboard back side B550 eeprom reset. Red line!
LExxB6000
B6000 mainboarboard eeprom location, reset procedure
C Series SoC EEPROM Location
LExxC550/530
C550/530 Board C550/530 reset. Red line!
LAxxC650
LA40C650 Board LA40C650 eeprom`s place LA40C650 reset
UAxxC6200
UA40C6200 Board UA40C6200 reset
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