The laptop started to wheeze strangely when I turned on any music or video, and the sound was terrible. I contacted this service, and the guys immediately said that they would first do a free diagnosis. It turned out that the problem was with the sound card, and it needed to be repaired. I agreed, because I don't need a laptop without normal sound. After a few hours, everything was already working as expected, I even tested it on a couple of clips. The price is normal, the warranty was issued without any problems. Now the sound is clear and loud.