first rodeo with a wg7000. ps- this unit has a remote board for adjustments. no image, no heater glow. when first turned on, there is a slight screen crackle, then no HV. chassis fuse good. my first suspicion is xray shutdown. i took the chassis home. i have a good tube from a pacman with a GO7. first can i use that tube with this chassis for testing? 2, there is a flow chart in the WG manual, but is there anything better? 3. where would you start with this? i checked the str3123 regulator. no pins shorted to each other, or to ground.pin 3 is to ground, as per schematic. it has 5 pins, but the 5th is cut off, and a blue wire comes from the pin 5 position on the PCB and goes to the large white ceramic resistor on the side . can i check B+ there, 123 v? there is a sticker says it was worked on in 1998. there is a rather crude hole in the pcb, see pic. if that a mod? thanks