Samsung LA40R81BD 40in LCD TV Main Board EEPROM Replacement

Geschrieben von: Richdave
  • Kommentare: 6
Samsung LA40R81BD 40in LCD TV Main Board EEPROM Replacement

Schwierigkeitsgrad

Very difficult

Schritte

3

Zeitaufwand

1 - 2 Stunden

Einleitung

This is not for the feint hearted and assumes you are capable of performing surface mounted component removal and installation. If you don't have the necessary skills and tools you may well do more harm than good!

You will be able to remove the main board and locate the likely faulty EEPROM. This guide is accurate for the LA40R81BD model however there are many similar models that experience similar issues so you may find it useful in repairing other model Samsung TV's

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    • Unplug power cable and all AV cables from rear of TV and carefully lay TV face down on a clean flat working surface ensuring that you don't damage the LCD screen.

    • Using a Philips driver remove the 18 screws from the rear panel.

    • Gently lift the rear cover off the TV. You may need to wiggle the cover a little however there are no clips holding the cover on so it should come off easily if you have fully unscrewed all 18 screws.

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    • Gently peel away the conductive fabric from the metal cover on the board

    • Remove 5 connectors from the board

    • Remove 6 screws from the perimeter of the board.

    • Lift the main board away from the chassis ensuring you don's snag or catch any of the cables.

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    • Turn the main board over to expose the side that was facing the chassis and locate IC1803 (24C256 integrated circuit).

    • Carefully remove the old EEPROM being careful not to damage the copper pads or tracks on the board

    • Use solderwick to carefully clean the pads where the old EEPROM was mounted

    • Install the new EEPROM ensuring you orient pin 1 of the new device with the correct location on the board.

    • I used an AT24C256C-SSHL-B 8SOIC integrated circuit. There are a number of compatible devices but be sure to get the correct lead spacing to fit the board.

    • Check the solder joints with a magnifying glass to ensure there are no bridges between the EEPROM pins before you reassemble and power up the TV

    • The IC 1803 designation and location on the board is specific to the LA40R81BD model TV.

    • When you power up the TV it may cycle a few times before turning on normally. This is due to the EEPROM being blank and default data being written to it. This is normal. You will need to reset all customised parameters and the date/time in the main menu.

Abschluss

To reassemble your device, follow these instructions in reverse order.

Tinte & Feder

Richdave

Mitglied seit: 10/04/10

31842 Reputation

6 Kommentare

I have a problem with my LCD , it blinks 6 times the switches off.

I also need to know were the memory IC is located and how to replace it.

The model is LE32C350 (Samsung)

ABDUL RAZAK -

My Samsung TV has no picture and sound power light blinks I changed the T con board still the same what can it be thanks JOHN

jstone6651 -

Please help Samsung TV black screen

jstone6651 -

You should post your question in the forum not as a comment on the guide.

Richdave -

I am currently working on a few tvs . I have always just ordered a new mainboard and replaced but I have a rework station I used to use for fixing cellphone charging ports so I am considering fixing the main board. my question is can I order one single eprom since they are programmed and use it to fix any tv just to keep a stock of them instead of waiting for the part to come in or the eproms all different.

victor trujillo -

Hi my power light keeps flickering and all there is on screen is top left showing channels numbers one after the other but if i hold my finger over the on off button and slightly press it at the same time it comes on but goes back to channel number running in top left can you help please.

Tom.

Tom Mackley -