A:AnswerYes, the 70UK6190 supports screen share and content share and is compatible with your Google Assistant. It is not compatible with a magic remote. ^CP
A:AnswerWe hate to hear that you are having trouble connecting your optical device to your TV, but would love to be able to help. We would be happy to see what's going on. Drop us a line on Twitter at @LGUSSupport or on Facebook https://www.facebook.com/LGUSA/ or you can give us a call at 800-243-0000 so we can get more info and see what we can do. ^CP
A:AnswerHello, this TV is manufactured for use in the USA and does require 120Vac for optimal operation, however, the TV can withstand up to 240Vac with an adapter if needed. ^CP
A:AnswerRegrettably, there isn't a contrast ratio listed for the LG UK6190PUB 4K HDR Smart LED UHD TV - 70" Class (69.5" Diag), Model # 70UK6190PUB nor for any of our TVs. Manufacturers stopped listing contrast ratios for TVs a while back because there was no standard for measuring contrast ratios so unless you knew what method was used to measure the contrast ratio, the number was essentially useless. The UHD Alliance has a minimum brightness requirement of 1,000 nits, along with a black level of a maximum of 0.05 nits (20,000:1 contrast ratio) for 4K HDR LED LCD TVs...^IFV