Zenith Sentry 2

The drivers for the hardware don't exist for windows 8. You need to format. turn on holding the 0 key. follow steps to set to factory defaults, save your pictures and documents first cause this will erase them.

you likely connected it with one or both units involved on and HDMI does not like that--prone to all sorts of audio issues.

If in doubt unplug the units and wait and plug back up making the connections first.

These usually have a start up capacitor that goes bad in the power supply.

Hi,
Required remote for your TV is available HERE.

picture horizontal in the tv

dont get mad like i did, report this problem to zenith, they seem to be aware of the problem with this particular model.
i gave them the model number and they requested the purchase date, then extended the warranty and gave a number for a local repair shop which came for my set a couple days ago.
so far so good. it may be a while until i know whether the repairs will work, however hats off to zenith, so far, which seems to be providing appropriate customer service and standing by their expensive products.

try to solder any loose connection