Forst ST6 D BLADE NOT GOING FORWARD

[Ski]

Hi there, excuse my ignorance my st6 D was working perfect. Turned it off...i then moved it in garden and went to chip more bit it won't go forward. Will go back no problem but not forward.. Not blocked as I was chipping very small kindling 

[Ski]

Safety mechanism on top is not pressed down and red bar at back is not pushed in either 

[Mick Dempsey]

Check the buttons on both sides are working correctly (ie check flashing lights on the button

units)

[Will C]

Has the throttle lever come slack so doesn’t stay on full revs in effect making the no stress kick in before you start? 
 

also check the light (red or green from memory) on the solenoid comes on when you push the feed direction buttons