Frontier LP5700R/570R has power but no LCD display or startup

[Bundyphoto]

Hi guys, I have a 570R and after doing some maintenance on P1R rep pump I have this problem.

The fans are running and power 1 and 2 light are on but no display or usual startup sequence.

I may have pinched a wire to said pump and caused a short, anyone know which board could cause this problem?

Any help greatly appreciated.

[Minilab service]

Operation panel has connector KEY1 . It through connector JKEY1 connected to connector CTL4 on CTL23 board. The same board controlls processor. Check CTL23 power suppliers. Try to reset this board. Test board on other printer.

What is on LCD depends on all boards - CTL23, LDD23 and image box. Usually on LCD see something ( dots. dash , etc ) . On your LCD is blank. Might be power supply is missing, but it comes from CTL4 .