When a client wanted me to lie on a warranty claim

Yesterday, a guy brought in his gaming console with a burnt-out power supply. He asked me to write the repair ticket as a motherboard issue so he could get it covered. I told him that's fraud and I could lose my business license. He got mad and said every other shop does it, but I stuck to my guns. Now I'm wondering if I did the right thing or if I was too strict. How do you all deal with requests like this? Have you ever faced pressure to bend the rules?