How to fix F6.1 fault message on Candela pro series devices

First, we need to understand the causes of this fault F6.1 which is mainly because the laser system failed to find threshold HD energy within normal voltage or laser system failed to find max HD energy within 60 pulses and this error might be caused by:

  • Laser System mobility shocks may have shifted the laser head out of alignment
  • Aging laser head or laser head components


Now to the fix, how do we fix this problem easily?
There’s mainly two solutions for this problem: