Speedy 400 Laser Firing Problem

[Chase Williams]

Sorry please let me rephrase, it will not work below 50% power but 50% and above it will fire. The tube was just fully tested a second time at Evergreen, so i feel pretty confident that its in good shape. Im 99% confident that the issue is in 1 of 3 places, the motherboard, the cable, or something with the tickle power. I just dont want to use good money to chase after bad and would love to isolate the problem. I am leaning on the motherboard as thats where the PWM, I would think would occur and think that might be the issue as the previously tested RJ45 PIN 1 was showing proper voltage. Im hoping for it to be the cable.