Hi, welcome to Just answer
How old is it ?
I believe about 10 years old
does it display E 8 or F8 or just 8 ?
and the display flickers
that is not a valid error code and sorry about the bad news but from whatever you have described in your question the problem is with a bad control board that will need replacement
Ok so how do I get a refund on the money I have paid?
I was writing the instructions on how to replace the part and was checking the parts for this model and you have rated it as Bad Service
can you tell me why ?