faulty motherboard

Up for sale is 13" Apple Mac Book Pro MUHP2HN/A (A2159: i5 8th Gen/8GB/256GB SSD) for parts. It was bought in Oct'2019. Worked flawlessly till last month, however, it has refused to charge since then. Was being used by my father. Dropped at Apple service center, buggers charged 3000/- to tell...

Want to buy many dead motherboards for a motherboard wall project at my new home. Any local leads for scrap dealers in Pune (preferably near Magarpatta) appreciated as well.

So I got a new Asrcok x570 Phantom Gaming board in Feb or March of this year and it never used to save the bios changes or the system date. I installed a new CMOS battery a few weeks ago but it still didn't rectify the problem. Anyone has any ideas what might be the issue? I really need it to be...