How do I use Google chrome on my hisense 55h6sg

Yes, https://www.google.co.uk/search?q=can+the+hisense+962+use+screen+mirroring%3F&oq=can+the+hisense+962+use+screen+mirroring%3F&aqs=chrome..69i57.1831j0j8&client=ubuntu&sourceid=chrome&ie=UTF-8

Software problem need to update with new one check website and how to doit

If it has gone back to factory settings, try 0000. Otherwise Factory reset it

Unfortunately, the links for your model do not work in all 4 "available" formats on their web site. the best thing might be to just contact them and see if they can email you the PDF..
1-888-935-8880

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

If it is asking for zip code you have not told it to scan for over the air or antenna channels when it asks air or cable

Corrupted software. A firmware update is necessary. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/