Orion (MXM365N) won't boot

[travi]

Just had a MX-M465 doing the exact same thing. Ended up being the PCU PWB. Found it by disconnecting Connector 18 on the PCU PWB or Connector 8 on the Mother PWB

[mbcruzin]

Had a similar issue with a MXM364N. Machine wouldn't boot out of the box. I called tech support after trying a few things from this thread. Tech support had me check all my voltage coming from the PS to the Mother Board, PCU and DSPF board. Everything checked out fine. The solution was a new PCU PWB. After replacing it The machine came to ready as normal.