Qn90A US model 85 have local dimming issue. I saw some other post shows same issues. when the TV wake up from sleeping(soft power on), the local dimming fail to properly change the brightness. and Local dimming set to high is as dim as low, and even dimmer than standard. So the TV stuck at a pretty dim status. Only hold the power button for long time to do a hard reboot will solve this temporarily, and after we soft turn off the TV and turn back on later , the same issue reoccur. Please fix this and this issue has been reported several month ago.