Do you have an RADF?
Try unplugging it and see if that changes anything. ( power off first !)
it sounds like you might have board issues. I would check the platen sensor ,the SLG and CCD board first , than move on to the SYS board
Are you 100% sure that you loaded the correct firmware as it sounds identical to when we had loaded the 4ccd instead of the 3ccd. We had to send the scanner boaed away to get reprogrammed with the jig. Out here the machine have a yellow dot or a red dot in the scanner section the red is 3ccd and yellow is 4ccd
I think u need to initialize some settings in 0+8 mode 662,665,666,684,685,686,687,690,693,947 it will be ok . recently i solved this problem in es 452
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