Ricoh MP C2504 - Flowchart to Determine Parts to Replace When no Display on Operation Panel; [A]: Leds on the Controller Board

Flowchart to determine parts to replace when no display on operation panel
Parts How to determine the cause
USB cable LED on CTL blinks for 1 second
Operation panel LED on CTL blinks for 1 second
IPU Fuse 3 on the IPU
CTL LED on CTL does not blink
Memory LED on CTL does not blink
[A]: LEDs on the controller board
Check the condition (lit, off, blinking) of the LED on the CTL.
LED /POSTCODE AREA on the CTL
Troubleshooting for SC Errors
981