Thanks for posting your question on Justanswer.com, a global paid independent support site. It will be very helpful, if you can explain your problem with little more detailed information.
Thanks for posting your question on Justanswer.com, a global paid independent support site. Error B200 means the printhead voltage or temperature is not normal. The Printhead could be defective and you may have to replace the printhead to solve the problem but first, try these solutions below, let me know, how it goes for you.
Solution 4b (thank you Jeremy):
Solution 4c (thank you Rhiann):