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Hi
A couple of days ago the hotend wouldn't heat up and i got a couple of errorcodes/warnings in the display. The bed heats up just fine, so i ordered a new hotend parts (heater, thermistor and a new aluminum block). Changed all of this, but still the same error. I can se that the thermistor works because it changes values in the display when touching the thermistor-end. Any good ideas why the heater doesn't heat?
Fair, a wire break can be annoying though, often they're intermittent, and the display often doesn't respond fast enough to show that, but thermal protection will.
I'd totally consider taking a look at the connectors to the board for the heater cartridge, see if there's good contact being made, check for any signs of things like scorching check end-end continuity. Looking at the schematics for that mainboard Btt skr 1.4 it looks like there are LEDs on all of the MOSFETs, it will give you a visual indicator of the board state, to help narrow down your troubleshooting.
Thanks for the links. Can't see any scorching, and everything I've measured seems OK. If there are LED's on the mainboard, i don't know how to light them. As of now there are no lights on the motherboard, but everything beyond that heater works..