Mini:

Printed a calibration print fine

Mini #2: 

Retracted filament that was supposedly jammed and reloaded new filament and it printed a calibration print quite nicely. 

Prusa:   

Fixed a filament jam (required head disassembly) but now prints fine.

Taz 3:   

Heat heater resistor was blown so no nozzle heat.  Lucky for me I ordered a spare last time (they seem to last about 9 months).  I took the head apart and replaced the heater and it now prints fine.

Taz 5:   

Removed some broken filament that some nice person left in the machine and now it prints fine.