ZS3 Service Manual  Page 195 of 295 
POWER-ON PROBLEMS 
System fails to power on 
1.  Ensure that the AC power is connected to a wall outlet. 
2.  Ensure the AC power cord is fully seated in the socket on the rear of the cart. 
3.  Ensure that  the circuit  breaker  (located in  the lower-left of  the rear panel) is 
pressed down in the “1” (On) position. 
4.  With active AC power applied, verify that the LEDs located at bottom/rear of ZS3 
system are in the following condition: