It sounds to me that if you paid $200 to get the keyboard replaced, that fee probably included diagnosis and repair, so in that case they should have properly identified the damaged motherboard.
I think the only proper thing for them to do is either...
1. Repair it
2. Issue a revised estimate for a keyboard and motherboard and give you the option to decline and get a refund for the incomplete repairs
Of course this is just my opinion and I don't have all the facts.
Thank you so much for your information. I guess I read the wrong policy or I misunderstood it.
Thank you again.
Thank you for your information.
I don't know too much about warranty policy so got a little bit confused when encounter issues about it. Thank you again!