To be honest, I don’t usually mess with this kind of stuff myself because I wouldn’t call myself an expert in appliance repair. I had a similar issue with my device, but as you can imagine, the warranty had expired and the service centers wouldn’t take on the job. I happened to have the
service manual for Samsung UE32D5500R in digital format on ManualMachine, so I decided to take the manual to my neighbor, since he repairs things not only for himself but also for friends by arrangement. I was lucky that he wasn’t busy and was able to help me. By the way, he really appreciated the manual I brought; according to him, it actually helped. As it turned out, the contacts on the matrix had come loose and needed to be soldered back on.