Went to an MP 4000B today with SC 544, after investigation the problem almost certainley pointed to the I/O board (as is suggested in the service manual).
To be sure, I brought the board along to a nearby working MP 4000B, to verify same, before I went and ordered an I/O board.
What was I thinking..
All went well I recreated the fault. Great I thought it has to be the board. Returned the working board to the working machine.
For some reason I decided to do a memory clear without doing an NVRam upload.
Now I have SC 302 'charge bias leak' on the working machine...
Followed the manual with all suggestions and I have drawn a blank.
Is it possible ive shagged the NVRAm by doing a memory all clear.
What was I thinking, I must have had a rush to the head, any ideas....
By the way I have manually inputted the machines SP data from its birth cert by to no avail......
To be sure, I brought the board along to a nearby working MP 4000B, to verify same, before I went and ordered an I/O board.
What was I thinking..
All went well I recreated the fault. Great I thought it has to be the board. Returned the working board to the working machine.
For some reason I decided to do a memory clear without doing an NVRam upload.
Now I have SC 302 'charge bias leak' on the working machine...
Followed the manual with all suggestions and I have drawn a blank.
Is it possible ive shagged the NVRAm by doing a memory all clear.
What was I thinking, I must have had a rush to the head, any ideas....
By the way I have manually inputted the machines SP data from its birth cert by to no avail......
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