Lcd Hisense TV powers up with blue light,but no picture

Good Day HelloPeter, I am so upset and disappointed at how Hisense handles customer issues, My Hisense TV is only a year old and we got back from work it had a blue light on and wouldn’t show pictures, I decided to call hisense explain what’s going on and the consultant said he will send me repair form to complete, 2days passed without receiving the form, I decide to take the TV back to the store I bought it from Russells Dieplsoot Branch, Fast Forward, On Wednesday I received a call from Russells stating that the Hisense inspector said the mainboard was damaged by ****roaches that they found on the mainboard and their warranty doesn’t cover damaged by roaches, I went to collect my Tv and decided to get a second opinion from my Uncle who is a technician as well, He said we should replace the motherboard and see if the problem will occur again, We did just that and the TV was working fine, later at night we switch it off using the remote and when we woke up the blue light was there again, the tv wasn’t showing pictures again.

I contact Hisense to give them feedback on my findings. And I was told that they still cant fix the Tv because we used a technical who is not a Hisesens Qualified Technician, This to me was very rude and they didn’t focus on the matter at hand, their inspector claimed that the motherboard was damaged, then was is the problem still occurring after we replaced the motherboard. Hisense should take responsibility and stop selling us products that are faulty, this is very upsetting especial because I Feel like Hisense could have taken the TV in for a full service and check what exactly is wrong with it. We spend our hard earned money for this products we exact quality and for them to deliver on their claims