Mini v2 does not go up after finishing printing

I have a Monoprice Mini v2 3D printer and it has been working okay.  A few days ago it started staying at the last place when it finished printing.  It puts our a little more plastic and then cools off and the last piece printed sticks to the nozzle.  It comes off and the  next print starts okay but it leaves a glob of material on the print that has to be filed off.  Always before when it finished printing it went up to the top and the finished print was okay.  I have modified the print bed so that the wires go out the back instead of being under the bed.  Being under the bed caused the wires to frey and the bed temperature would not register.  Going out the back of the back of the base and the heat bed did not cause the problem with not going up after finished printing.  It worked fine until a few days ago.  Do I need a new motherboard?

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What about adding gcode (via Cura) at the end of the job to move the bed forward and raise the gantry? That's what I use...

 

M117 Printing finished! ; Tell user the print has finished

M73 P100 ; set the build to 100% complete status

M104 S0 ; turn off hotend heater

M140 S0 ; turn off bed heater

G91 ; Switch to use Relative Coordinates

G1 E-2 F300 ;retract the filament a bit before lifting the nozzle to release some of the pressure

G1 Z1 ; raise Z 1mm from current position

G1 E-2 F300 ; retract filament even more

G90 ; Switch back to using Absolute Coordinates

G1 Z120 ; move gantry up to top

G1 X60 ; move X axis to middle of bed

G1 Y120 ; move bed forward for easier part removal

M84 ; disable motors

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

G4 P15000 ; wait fifteen seconds

 

M107 ; turn off fan

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