ES7506AC solid cyan (intermittent)

[Lunatech]

Okay, today the first thing I did was to reseat the ribbon on the LGC going to the cyan laser. No go. Then I reseated all the connectors on the SYS board. No go. Then I pulled the EPU and cleaned the cyan corona. Not only did it not get rid of the cyan background but I lost most of the black. It was very faint and with the cyan all over everything nearly impossible to see. So I decided to try calibrating it and the calibration chart printed just fine and it passed calibration. I made copies and they were fine and I calibrated it, but when the client sent a job over the network the first page came out blue, as did all the others before we got it stopped. Then I noticed the clock was about 20 minutes fast, so I set it to the proper time and after that I was able to make copies and internal prints so had the customer send his job and it was fine...for a while. After about 20 booklets it made 2 covered in cyan and then went back to normal. I know I'm missing some large piece or pieces of the puzzle. Everyone involve is fed up with this thing.

[djbass]

It happened again. Here is a photo sent to me by the operator.

This does not look like a charge issue, it's too clean, sharp and consistent. I know some of this you have already tried, I'm going to list it anyway but things I would be looking at are the laser, logic or system board, SRAM, potentially corrupt software or settings which I'd tackle by taking clone file, wipe the HDD and reload firmware, perform a factory reset (I say this because there are settings not cleared even by a HDD wipe that factory reset will) and test for the issue before restoring from clone file incase there is bad data backed up in the clone file.

[Rusty.Harris]

Sounds like you are almost at the "take a shotgun to it" stage.
Years ago, Toshiba had this "don't copy, lead" thing and they gave us this small mallet. Wooden handle, Hammer head painted red. I got the owner to give it to me and I kept it
in my service vehicle. (for some reason he didn't want to know why i wanted it, but said if the police call, I'm not bailing you out).
Who hasn't had a customer say if you don't fix it I'm taking a hammer to it.
Well, about 3-4 months after I kept it in my car, a long time customer said that and I told her I needed to go get a part from my car.
I came back with that, and dropped it on her desk. She busted out laughing, put her in a better mood.

Onto your problem, I'd go with the laser too. Also, I agree, if multiple techs have tried fixing this issue, download a clone file of the machine along with downloading
the CSV files. Do a factory wipe, reprogram the s-ram, serial number etc and see what happens.
At least you will have a backup copy of the data.
If that DOES fix it, perhaps download the new CSV files, stick them in the MMDT app and see if you can find what got "tweaked" but never put back.

[Lunatech]

Well I appreciate all input. It is gone. I was out yesterday and it went down again and all the people involved came to the conclusion that it would be better to trade it out for a Kyocera TA7
353. Happy Day.

Thanks again for all the support.