Turn the dot projector module over. Clean residual adhesive on the module with the sculpture knife. Then clean with Solder Wick thoroughly. Clean with PCB Cleaner afterwards.

Get the BGA reballing stencil in the right position. Apply some medium-temp solder paste. Heat with Hot Air Gun to get the dot projector module reballed.

Attach the new dot projector flex cable to the PCB Holder. Apply some paste flux to the new dot projector flex cable. Get the dot projector module in the right position. Solder with Hot Air Gun.

Cool for 2 minutes. Connect the new dot projector flex cable with the repair programmer. Click ‘Check’. Results: Normal. The infrared light emitted from the projector is also normal.