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==What to do if you have problems==
*'''===Check your TV hardware:'''===
**Can your TV actually play UDH 4K content?
**eg, try playing UDH from a different streaming service such as Netflix, Youtube, Vimeo, iTunes, Amazon etc
**If you can play UHD 4K then there is probably not a problem with your TV hardware
**If you can't then check the
***HDMI cable (some cheaper cables may not be so great)
***HDMI input (not all HDMI inputs on a 4K TV will accept UDH 4K video)
***Use a wired ethernet connection instead of WiFi
***Try a different player - eg if you use a device such as an 4K Apple TV, try your Smart TVs built in Apps.
*'''===Check your internet connection:'''===
Check the speed of your line:
**Use a wired connection rather than WiFI ▼Look on the Contorl Pages for the 'Rate' of your line.
**Try speed test sites to check your connection, you'll be wanting to see about 25Mb/s or more ▼[[File:Control-pages-rate.png|frame|Rate is the download speed of your line]]
***http://speedtest2.aa.net.uk (the A&A tester) ▼
***http://fast.com (Netflix's speed test) ▼
▲**Use a wired connection rather than WiFI
▲**Try speed test sites to check your connection, you'll be wanting to see about 25Mb/s or more
▲***http://speedtest2.aa.net.uk (the A&A tester)
▲***http://fast.com (Netflix's speed test)
*'''Check our CQM graphs on the control pages'''
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