Greeting forum people!
Just finished building my Vertex K8400 without too many problems. I guess this is when karma gets back at me and Murphy’s law sets in.
Very excited, I plugged my spanking new printer into the wall socket (without the extruder-plug being attached). Red LEDs lit up around the casing (as expected) and a green light turns on for a few seconds underneath the main board. The LCD goes blue, but nothing is being displayed, so I adjust the contrast using a small screwdriver, but still nothing. Hmm… disappointing…
Ok… Lets try and figure this out:
• Check the LCD-connection to the main board. Red wire is on the left (seen from the front of the casing), the other end is near the reset-switch. OK
• Disconnect all the stepper motors and axis stoppers. Still blue.
• Disconnect reset switch. Still blue.
• Remove all driver boards, Still blue.
• Re-attach all driver boards, stepper motors and axis stoppers. Still blue.
• Connect printer to a Mac, boot into bootcamp/Windows and attach printer. The board is detected and I install drivers.
• Run the software and check the temperaturs. Everything seems find. I get a constant temp of 21.5 degrees on one extruder and the other extruder is dead (which is very good, since I din’t buy a second extruder 
)
• Try to fiddle around with the manual contols. Works like a charm. Alle Axis are seemingly working.
• Turn of printer, pull the LCD/card-reader pieces apart (yes, they were connected) and put them together again. Turn on printer. STILL BLUE!!
Ok. Any suggestions? Should I try one last time to pull all the wires from the board except the LCD-display? This is very frustrating. I hate the thought of waiting for the board being sent back and forth through mail. It’s gonna be weeks! I wanna start printing NOW!
Cheers!
