Having an issue with a Universal Laser ULS 25 that was made in 2002 with a serial number in the 3300"s
When I power on the laser without the laser hooked up the meter will read over 48 volt but if I power on the laser with the laser connected, I get only 9 volts.
This only happens when the lid is closed.
I just had the laser rebuilt and it worked for a few cuts but then thjs issue started happening

Question: Is it the rebuilt laser or the old power supply and how would I test

Video of the issue
https://youtu.be/zjgEwuMWt2I