M126/M127/M128  6-52  SM 
6.5.2  ENGINE BOARD SERVICE CHECK 
Engine board service check 
 
FRU  Action 
  
  
  
  
  
  
  
  
  
  
  
  
    
Engine board assembly 
POST (Power-On Self Test) 
 
  The machine should complete POST in 
approximately 45 seconds. 
  If the machine fails to display lights or activate the 
drive motor, fuser, or fan, then check the following 
order: 
1.  Power to the LVPS/HVPS 
2.  Power from the LVPS/HVPS to the engine board. 
3.  Cables are plugged in correctly, especially for the 
operator panel. The machine will not power-up without 
a functioning operator panel. 
4.  The operator panel (
p.6-64 "Operator Panel Service 
Check")