HelloWelcomeThanks for using JustAnswerA few things here>>>
Initially the elco capacitors on the powerboard need to be examined visually for going bad either leaking/raised domed tops/ballooning/ like in the photo, whilst your issue may be elsewhere in the set this is the initial thing to do as samsung are reknown for bad capacitors on the powerboard once this is checked out we can move on with it, the powerboard is easy to trace just follow the powercord
Also did the freezing and vertical lines faults appear at the same time?
Does it do this on other inputs like a dvd/bluray?
OK well please check them capacitors out on the powerboard like in the photo then we can move on with this as you may have more than one fault especially if the capacitors turn out to be ok
This is difficult but its either the lead itself or the tcon board, I would suggest you replace the lead first, however it could easily be the tcon so if you want to do both let me know
I will locate the part numbers
Here is the tcon I strongly recommend you check the part number on your tcon to make sure its the same, their are many varients of tcon
Still looking for the LVDS lead
Let me know