Hello, I initial had some grinding noise coming from the extruder motor from my last print. Now it will not turn at all. In addition to this the right hand lead screw skips. I ran a test run of drivers and motors by swapping around connections and I found that: 1. All motors are running fine, some have suffered a little damage from skipping but they run smooth enough when hooked into a functioning plug. 2. The extruder slot refuses to run regardless of motor and regardless of driver. Is there any plug that would mess with the extruder and a lead screw motor that could be loose, or am I looking at a board replacement? Could this be a power unit issue? If I replace the board, should I replace both mega and RAMPS? Also could damage have occurred from heat or just getting old? PS: I cant believe the community is still alive for the R1, I have been save more than once by this community. Thank you in advance.