Fixing the dimmer unit for a Vava light

[HosHos]

Hi
Im trying to fix the dimmer unit for a Vava lamp.

Attached how it looks like from the inside.
Also, YouTube video explanation link

Just to be clear, Im not a technician, just a simple person who has lower than basic information about circuits & boards & electronics

Appreciate your support or guidance

 

[Doug]

Maybe white wire is open or bad connection.with a meter check for continuity from the circuit board to spring on the battery.