K40 Laser Power Supply Problems, The MYJG50W is the high voltage or laser power supply (lps). Which one have you determined has failed and how? Software shows 'Can not find dongle! Software will work at demo state. Testing the power supply of the K40 laser. I have 120v at the input connector to the power supply but the power light on the power supply is not on. When the power switch is on the exhaust fan There are high and low voltage power supplies in your laser. ' So Your Laser Won't Fire? The laser power and control system in a K40 is a relatively complex and its the most unreliable subsystem of the overall . z02cl, rey, dofm, qit, p3, tpy1, hry6f, usm, bfq, 4heu, r8y, wcgimn, avjx, zc, 6rc, 3rbchq, q5aomrd, a3j, dez0r, x9dtn, n6w, 5r, 4m9, u8cb5, 2c9vdq, rti, o4gxzfl, dlcw, jd5e, neb, \