RAZER BLADE PRO 17 4K RTX 2080 - SENT TO WARRANTY, PROBLEM WAS NOT SOLVED

I received from dell service my 2019 blade pro 17, was sent for a display problem, has an area with some stuck pixels or something(the touch has no marks or scratches), also, when dedicated video card is running - all the time, as i want 120hz all the time, when a sound is played, there is like a crackling noise, like an old mechanical drive. well from the service they couldn't reproduce the problems :)))) nice. now I opened a new case, and of course, no answer. I heard of this kind of problems with the service, but come on, if the technicians cannot see the pixels, or listen for 5 minutes and try to replicate the sound, they are paid for nothing. paperwork can do even a 60 year old lady who don't need to have skills in testing laptops. i understand that are some standard tests, but since the day i shipped the laptop passed almost a month till i received back. and they only run a hardware test. that I could do it by myself home prior to ship it in the great Germany to the razer service center i need help, to resolve this 2 issues asap, PLEASEEEE