Its probably your mega then
I'm unsure which port your talking about, your first post days D8, and later your talking about the hot end on D10.
You configuration doesn't help as you have missed the "motherboard =" section so I don't know what part of config its using.
Your topic says "D8 to D10" but if this is your heated bed, you can't do this. D8 is on the 11amp circuit. plugging the heated bed into D9 or D10 goes threw the 5amp fuse and it will blow.
But basically test the io ports
Remove the ramps
Setup a led and resistor in the D port you which to use
load up the blink demo program, change the port it uses to the port you testing.
Upload firmware (this will overwrite you current firmware)
Does it blink? yes the IO pin is ok, no, The IO pin is dead.
repeat for all io pins you which to test
See [learn.adafruit.com] for more information
I'm unsure which port your talking about, your first post days D8, and later your talking about the hot end on D10.
You configuration doesn't help as you have missed the "motherboard =" section so I don't know what part of config its using.
Your topic says "D8 to D10" but if this is your heated bed, you can't do this. D8 is on the 11amp circuit. plugging the heated bed into D9 or D10 goes threw the 5amp fuse and it will blow.
But basically test the io ports
Remove the ramps
Setup a led and resistor in the D port you which to use
load up the blink demo program, change the port it uses to the port you testing.
Upload firmware (this will overwrite you current firmware)
Does it blink? yes the IO pin is ok, no, The IO pin is dead.
repeat for all io pins you which to test
See [learn.adafruit.com] for more information