Why did it stop connecting to internet after only 6 mos?

I have an Asus MeMo Pad Smart 10" ME301-T

I was streaming a HBO movie when the screen suddenly froze. I closed out the browser & went to reconnect to my router. the screen said "saved, secured with WPA2". Even the free connection from Xfinity wifi to any hotspot would not connect. I have tried factory reset -no success. Is there a part inside that could be replaced easily? ASUS said I needed a new motherboard and the cost would be more than i paid for the tablet brand new. any help would be appreciated.