DIY Series 53: Sharp TV (LC-40LE280X) Unable to Keep TV Channels Saved After Power Off

Symptoms:

• Unable to keep TV channel saved after Power OFF
• There are no TV channels available upon Power ON, need to retune all channels every time Power ON.

Findings:

• Flash Memory (Winbond W25Q128FV) malfunction 

Photos:

1. Sharp TV LC-40LE280X
2. Sharp TV LC-40LE280X (Back Panel)
3. Dismantle the stand base (4 screws)
4. Unscrew 4 screws at the bottom
5. Unscrew all screws at the back cover
6. Open up the back cover
7. Location of Power Board, Main Board, and Panel Board
8. Disconnect and take out the Main Board
9. Replace the Flash Memory (Winbond W25Q128FV) with soldering tools

Notes:

• If the above is still not working after change Flash Memory, recommended to change the Main Board

Tools required:

• Screwdriver, soldering tools

Cost involved:

• Winbond W25Q128FV IC (with program flashed) = US$4.20
• Main Board (Used Unit) = US$30

Remarks:

After fixing, if the TV screen is black screen when Power ON, do a factory reset:

• a) Unplug the TV power cord
• b) Hold the Power Button for 30sec
• c) Plug in the TV and Power ON again

Check online for more alternative approaches if this is not working for your case.