A:AnswerBuy a 4k that the model number is 800 or above. These are 120 MHz as the other lower numbers are 60 mhz. If I had the dollars I would have gone with the Sony 65" 900E. Hope this helps but I have had good luck with LG products. As per the way the world is changing it's quantity now and not quality. BTW, the 240 refresh rate is not the real rate it's 120. The 120mhz refresh rate is 60mhz. Little slight in wording the manufactures get away with because of the way it's calculated.
A:AnswerAccording to Consumer Reports, they tested this model thus:" Image quality is tested using a 4K movie player connected to the
TV’s HDMI input, as well as from files stored on flash drive plugged into the TV’s USB port." So, I assume they each support 4K.
A:AnswerThis TV uses the LG Content Store for its apps. Regrettably, we do not have information regarding compatibility with 3rd party external devices. ^CP
A:AnswerWe regret to read about the issues you experienced with both of your 2016 models and apologize for any inconveniences. However, we are not aware of any reports about such issues with regards to the LG SUPER UHD 4K HDR Smart LED TV w/ Nano Cell™ Display - 65" Class (64.5" Diag), Model # 65SJ8500...^IFV
A:AnswerHello, we would need more information to be able to assist. Please drop us a line on Twitter at @LGUSSupport or on Facebook @LGUSA so we can get more info and see what we can do. ^AC
A:Answer240 refresh rate is 120mhz and 120 refresh rate is 60 mhz. TV's with a model number ending in the 800and higher are 120 MHz others below the 800 are 60 mhz.