Hdmi works fine but when I plug my roku 2 into hdmi sometimes it works other times it says not support how can I get it to recognize the roku 2 all the time

You didn't mention whether you switched inputs on your TV for the different devices. Fix could be that simple.

RTM
THE MANUAL IS FREE TO READ.
NO MODEL TOLD RUKU
THERE ARE 2 KINDS BASIC, PURE USB DONGLE
AND THE USB BRICK (MINE) i HAVE 3.
i will do the brick kind
I lay brick on console table
I plug in HDMI from Roku to TV ,hdmi #1
i plug in dc power pack from AC wall to roku dc jack
I plug in Ethernet to brick roku RJ45 jaCK OR USE WIFI
I turn on ROKU REMOTE TO ON
i turn on TV and push input select on TV remote
I pick hdmi #1 (roku is there)
and like magic it works if internet is not dead.
if using wifi pick wifi settings in roku , remove. per the manual

I will not cover, ROKU USB dongles, (mine is retired)
RTM read the manual

https://support.roku.com/article/208754888

If the picture is OK then check your sound cables, red and white if analog, or swap out the HDMI cable with one that you know works.
Also, on the SETTINGS screen make sure your audio is set to stereo not surround sound.

Check this link at Roku's help forums... http://forums.roku.com/viewtopic.php?p=375728

This sounds like a basic setup, so correct me if I made any wrong assumptions.

You have 2 "output" devices: a Roku and a cable box. Both have HDMI outputs.

You have 1 "input" device (your TV) that has 2 HDMI inputs available.

So, you need one HDMI cable to connect your cable box to your TV. Remember what HDMI port it's connected to - the back of your TV probably says "HDMI 1" and "HDMI 2" or similar. That's the "input name" of your TV.

Connect your Roku to your TV with another HDMI cable.

Now turn on your TV and use the remote to change between the inputs. Most remotes have a button that says INPUT or SOURCE (or sometimes a dumb little icon with no writing). If you press that it should change inputs. Usually, each time you push the button will cycle to the next input, so sometimes you have to hit it a bunch of times until the on screen menu shows the input you want. Most TVs will automatically switch to the selected input after a few seconds, so you don't have to push any buttons on the remote to tell the TV to change inputs.

If "at the same time", you meant actually watching both Roku movies and your cable at the same time, you are talking about a TV feature usually called "picture in picture". That should be possible, but will depend very much on your TV. I'd suggest checking your TV manual, or calling the company's 1-800 number and asking them to talk you through it.

you may need to change the HDMI board in the tv. it will be the hole board the parts are just to small to replace them all to get the HDMI board working again. find a second hand replacement. should be fine with another known working one.

Hi,

You must match the TV's input connections and the Roku output on your remote. This means if the Roku's output is connected to your TV's "HDMI 2" (or A/V 2, etc.), you must be able to select HDMI 2 (or A/V 2, etc) on the TV - either with your remote or pressing a button on the TV itself.

Sometimes, the TV will skip over unused inputs when it was first set up. This is done to reduce the number of button presses to go from say "HDMI 1" to "HDMI 4" by programming OUT the HDMI 2 & HDMI 3 choices.

You'll need to program IN the input that your TV uses to connect the Roku if it isn't already available. You MUST connect cables properly if not using HDMI. RGB is Red-Green-Blue and must be connected to RGB jacks at the Roku and TV for a picture and the the White & Red (left and right) audio must connect the the corresponding Red / White audio jacks - or it will provide strange results.

Make sure the power plug is connected to an outlet that is ON and connected to the power jack on the Roku box itself. Unless you have a defective Roku box or TV, it SHOULD work. You can try using a different HDMI or A/V jacks on the TV to determine if it is the TV jacks or not.

Good luck!

Glenda, Are you connected to your tv by HDMI or AV cables?
The blue screen is usually an indication of one of two things.
1: The HDMI cable has come loose but not entirely disconnected (Turn off Roku and TV unplug the HDMI cable from the Roku AND Tv and reconnect them making sure to seat the ends securely and turn on TV and Roku in that order)
2: your TV or receiver may not support HDCP (a content copy-protection solution) over HDMI. This is generally true for older TV models that have early HDMI implementations that do not follow current standards. Try connecting your player with the included A/V composite cable instead.

The Roku is the problem, not the TV. You need to go to the Roku site and request download information to synch the Roku to an HDMI input.

You have to go into the setup of the Roku and select 16x9 and HDMI.