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Hisense TV forgot password
The easiest first step to unlock your HISENSE H65U7A password is to call back, or send a message to the former owner. However, he or she may have forgotten it! In that case, do not get upset. The default codes are 0000, 1234, 1111, 7777 or 9999.May 23, 2018
There could be a few different problems. You should first narrow down the possibilities. If you are playing the mp4 file directly from your laptop try changing the source. Put the mp4 on a usb drive or on a playstation/xbox or simply on a dvd. Try playing the file through one of these other sources. If the audio no longer lags behind the video than its likely an encoder setting that your Hisense doesn't handle well. If lagging is still present on all your sources then change the type of cable. If you are using HDMI try RCA or vice versa. You can also separate the audio from the video. Try using a VGA cable between your laptop and TV for the video and use a separate RCA to 3.5mm headphone jack for the audio, Most Flatscreen TVs have dedicated audio inputs for different video inputs. Try out these different set ups and you can determine if the problem is with the TV the Laptop or the cables in between. If it is the TV you may have a problem with the main board but this is unlikely especially if the audio video sync works fine with other file types.
The word ''no sync detected' means that there is no video connection between the cable box and the TV set. Isolate the source of trouble by connecting to the TV a prevoius video source that worked properly e.g DVD player. You should also try to get a new set of video cables as the ones you have may be internally broken.
Please follow the installation instructions carefully especially the colour codes of the video and audio cables i.e yellow cable to yellow connectors of TV and cable box , Red cable to red connectors of TV and cable box etc.
good luck!
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