Error C4551 and C4554

We just sold a C353 with only 7K and it worked fine until the cold weather arrived. It then displayed a C4554 error. We changed the black laser and updated firmware. No help. Reinstalled the old laser and upgraded firmware worked fine until the next morning and got a C4551 as well as a C4554 code.

I did some research and read that I would need a special firmware upgrade G2A-09. Any thoughts. Please advise.

Thank you,

Johva