Chosen Solution
I repair televisions. This is the second Hisense 55R6E that I have replaced the main board in. All precautions were taken. The unit would not connect to wifi but the picture was good. Replaced the mainboard and the wifi and the image had multiple colored lines running both vertically and horizontally. Put the old main board back in that worked previously (except for no wifi) and the lines remained.
Hi,
You have to check the T-con board flex cables, It seems like something wrong with your flex cables. try to clean it up and check whether your flex cables worn out. Hope this will answer your question.
