Dodgy yoke connection? Are those croc terminals actually making contact?
D127? C401? VR402 (V.AMP)? Reseat control board.
Hi  

Well... I have done it again!   

I had tested D127 in the past... It tested OK.. 
But I had again forgot to solder the leg in, that i had lifted to test the diode...
Somehow.. when I solder the parts in things work alot better  
 So the solution to the collapse where just to put som solder on the leg  
