Sainsmart 3018 prover not finishing design

Can any one help with this? Left board was done with grbl laser right one with light burn 1.0.01. I can not get it to go past 6-9% with light burn. Using sainsmart 3018 prover with 5.5w laser. I did unplug the external power supply for the laser, and it will travel completely thru the whole project with light burn. I am at lost of what to trouble shoot next. I have grbl selected as device in light burn.

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