My K40 died last October, I thought it was the power supply but replacing it didn’t seem to do the trick. I then purchased a new tube from LO, installed it but now get no power (no green led).
I thought it might be the safety switches, but I am getting 120v across the leads on the power supply so they are making contact.
I tried the original power supply with the same results, there doesn’t seem to be any sensors on my machine. I tried unplugging the two connectors leaving only the power and that didn’t do anything. I guess it could be possible that both LPSU are bad, but I used to get the green light even when it failed.
I’m wondering if the digital board died, but wouldn’t the LPSU at least power on?