Mingda Glitar 6

I am an elderly man and I have brought a Mingda printer. It has stop working and I cannot get any help from the company in China. The hot end will not heat up and the temp is stuck on 309 degrees. I do not know what mother board is used as they will not talk to me. I feel that the thermistor or thyistor is shoot.

I cannot print and I cannot find any info. Is there someone out there which can help and guide an old man

Do you have any experience with electronics?

Yes I have 5 sons which can help me I do understand circuit