RAMPS extruder output broken? (1 reply)

Seriously guys,

I really start to be at war with electronics. Whichever project I start, I always end up having trouble with the electronics...

I got a RAMPS 1.4 board with Repetier firmware running with Repetier host. The first thing I noticed was, that the power terminal for the first extruder is broken, particularly one screw, whose thread won't grab onto the spring clip. Thank you, China.

So I hooked everything up to the second extruder terminal and changed the pin layout at Repetier, that all pins for the second extruder are treated like it's the first one.

Then I tried to heat up the hotend... nothing happens. Wow. I wired the hotend to the heatbed terminal, the hotend heats up and the thermistor shows the right temperature. Ergo the hotend is not damaged.

In Repetier host I activated the second extruder terminal without anything wired to it and hooked up a multimeter... It shows something around nothing and 0,15V, the red LED is just showing an almost invisible flickering, while it should be something around 12V.

So anybody an idea what could be broken or how to fix this?