FPC cable is a flexible cable connecting the AP mainboard and the LCD display module (LCD High resolution screen).
The FPC cable is broken (old version shown), or the connector is out of shape or broken.
Please following the guide steps to do the replacement, power OFF the printer while doing disassembly and assembly work.
Power off the printer, remove the glass cover plate.
Press to release the buckle and push the display rightward to unlock it, and then disconnect the FPC to remove the display module.
Open the AP board cover as shown in the pictures below.
Use hair dryer to heat up the silicon glue on the connectors, and then disconnect the chamber camera cable, the chamber LED cable and the button board cable.
Remove the clear fixing tape, pull back the FPC through the square hole.
Remove 5 screws as shown in the picture below and separate the AP mainboard from the chamber.
Heat up the glue with a hair dryer, unlock the connector and remove the FPC, clean up the glue.
Transfer the ferrite ring to the new connection FPC, and connect the connection FPC to AP main board.
NOTE: Pay attention to the direction of the FPC, the connecting pins face upside as the pictures shown below.
Apply glue on the connector, or you can use a strong tape to cover the connector, just in case the FPC lose connection during the assembly.
(After the glue solidifies) Align the slots and limit block to install the AP board, lock in 5 screws.
Connect the button board cable, the LED cable and the camera cable, apply silicone to the 3 connectors, let them stand for at least 30 minutes.
Fold the connection FPC and pass it through the square hole, arrange the cables and attach the clear fixing tape.
Connect the FPC to the connector on the display, retract the FPC to make the length suitable and mount the display module, push the display module leftward to install it in place.
Close the AP board cover, install the glass cover plate.
Power ON the printer. If the LCD screen lights up and displays without errors, and when touching the screen, the touch screen response is normal, then the replacement is complete and successful.
Otherwise, check the connections and retry. If problems still persist, contact the Bambu Lab service team for further assistance.