HP Omen Motherboard fried after 15 months

Hp Omen ... what a disappointment!! I spent alot of money . Saving for months to purchase the HP Omen i needed for my business. It Is now just over 1 year old and on Monday while i was working it just switched off. I took it to the place i bought it from Matrix warehouse and they checked and have advised its the motherboard. I really dont expect this kind of machine to have a motherboard go in such a short time. I have now been quoted over R7000 to replace it. This is just unacceptable and clearly a faulty machine as the tech even said he has never had this issue. I hold HP liable and want some answers. They cannot expect people to pay R25k for a laptop that becomes a problem after a year and the motherboard of all! HP ID LIKE AN EXPLANATION AND REPLY AS TO WHAT YOU GOING TO DO ABOUT THIS! Day light *******!