Device not recognized by USB or Parallell

- Acts like communication board is bad. Does not mount as USB device.

-Printer will power up and main fan will run constantly.

- Does not appear to warm up nor go into standby.

- Device will not run test print.

- Both LEDs light solid at powerup for 2-3 seconds then go dark and remain dark.

- Top panel reset switch has no effect.

- Pulled all boards and visual inspection shows no burned or blown components. Caps all good and no visible damage to traces or PCB.

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