Microsoft Surface Book Defekt keyboard

Microsoft Surface Book 13.5 inch
Intel Core i7 6600U 2.60GHz.
16 GB RAM
2047MB NVIDIA GeForce GTX 965M
512 SSD
Selling as defective since few keys are not working on the keyboard, keys which are not working are marked (see picture 2). Everything else on keyboard is working including ports.
Everything else is working as it should.
Surface works perfect in tablet mode, touch screen is working as it should.
Both batteries are on approx 80% of capacity and keeps power from 2-6 hours, depends of usage.
No overheating or anomalies.
Comes with 44w charger.
If you have more questions don't hesitate to ask me.
Shipping same day of payment.
Good luck ??