MX850 with B200 error

[rocker]

I am getting a B200 error on my MX850. I realize that this typically means the print head is done, but in this case I am not so sure because when I lift the lid, nothing happens at all. I would expect if it is a faulty print head, that the carriage would still travel to the center (allowing you to remove the cartridges and print head), but nothing moves or does anything at all. I have tried turning it off, unplugging it and letting it sit a few minutes before trying to restart it, with the same results. Is it likely a faulty main circuit board?

 

[KasperDM]

I don't know how your German is (youtube auto translate subtitles can help), but have you tried these solutions? https://www.youtube.com/watch?v=_krz6Vtr6Gs