First off - Thank you so much for the prompt reply...I do appreciate your time and advise. It is a reassured feeling that one is not alone in their struggles.
I'm actually not sure what this problem could be. Since sending the first post, I disassembled the interruptor valve and looked closely at the switch - nothing seemed damaged or faulty. The switch contactors are doing their job (as I witnessed LED's inside the control cabinet). Since the hydraulic ejectors are the only thing working normally at this point, I decided to take the plug off of Eject Forward side valve and connect it to the Mold Closing side valve (to see if there was any blockage or some other physical problem inside the lines that prevented the platen from moving forward)...The platen moved forward when I pressed the Eject Forward button (only a short distance - but still forward)...I used this opportunity to double check my b44, b25, and b20 switching. I then returned the plugs to their intended homes to try manual movements (the way they were intended)...back to the same problem. The pump gives me the pressure up "sound" but no movement. Platen can move backward, ejectors move forward and return, but still no platen forward. At this point I'd rather just bypass the thing anyway...I'm just not sure how or if to jump out the switch. I can make up a block similar to what they have to allow the fluid passage un-interrupted...beyond that I'm stuck. Any suggestions are greatly appreciated. I'm also going to try calling Arburg service...