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MFPs R Now PCs
10-16-2012, 08:12 PM
We have a bizhub C451 where the Entire Operation/Touch Panel is Non-Responsive.


All measures taken are listed below BUT here are 2 strange things even AFTER all measures below were done.


1) Once machine is fully booted, if you press the power button on the operation panel (sub-switch) the machine will never turn off, it even beeps when pressing it (only if you throw the main switch will it turn off)

2) If you hold the Utility/Counter button while powering it on, it WILL boot to "Trouble Reset" but you cannot press it because the op-panel is now non-responsive - WTF?

Measures Taken:

1) Replaced Entire Operation/Touch Panel
2) Flashed Machine with Current Firmware
3) Replaced MFP Board
4) Replaced Control Board (MC PWB)
5) Performed Continuity Test on all pins of Cable running between Op-Panel and MFP board with Ohm Meter

907tec
10-16-2012, 09:31 PM
Did you replace the Ram when you installed a new MFP board? I have had similar issues with bad memory.

EarthKmTech
10-16-2012, 09:38 PM
Yep, I spent days stuffing around with a machine with these symptoms and in the end it was the RAM.

mo0651
10-16-2012, 09:57 PM
The part # for the memory chips even update. Try them.

MFPs R Now PCs
10-16-2012, 10:06 PM
THANK YOU MUCH! Tried different RAM and now op-panel is operational!!!

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