Tv not recognising hdmi connection

Having trouble with your HDMI port not detecting your monitors or TVs all of a sudden? Go to system preferences -- Click Display - Hold down the alt option key -- click the newly revealed Detect Displays button on the bottom right of the Display settings panel. That should solve 90% to 99% of issues if your cables and Macbook pro are good. This happens to me all the time when I try to plugin to a 4K tv at the office which is the exact same model I have at home. The one at home works while the one at the office never auto detects. If this did not fix your issue, check that your Macbook Pro HDMI port and HDMI cable ends are clean and free from debri and not damaged, double check that your HDMI cable is working on other devices, make sure your TV or display is powered ON, check that your HDMI cable is securely and fully seated, check that you're on the right input on your TV or Display, make sure the cable is not too long because HDMI has length limits depending on the cable and devices, and then force detect display again on your Macbook pro. If this still did not work, when it worked before. It's likely that your Macbook Pro, TV, or Macbook Pro HDMI port is acting up. I'd recommend taking in your Macbook Pro to the Apple store at that point to get diagnosed. Hope this helped

Press the Audio Parameter button (Looks like an x) then scroll up until you see 'HDMI AMP' and hit over to the left or right so it shows 'HDMI THRU' the HDMI will redo the handshake and you should have sound.

On the MacBook, check the Displays pane in System Preferences to make sure the settings for the external monitor are correct. It's possible that the system is not recognizing the adapter or it has the wrong resolution setting, so it's not sending out any signal that the adapter can use.

Many of the better DVD players and high-end video game consoles use HDMI. You can use one of those as a test signal generator to check the TV.

You may get better results if you use a DVI-HDMI converter, although you would need to get the DisplayPort to DVI cable. This will avoid converting to analog VGA signals and back to digital again.

You must connect up the TV to the SKY box, via Audio Visual cables too, in order to watch, recorded programs. You need to hook, up, Component, HDMI, or Composite, You select it by an EXTERNAL channel.
Connect the cable running from the wall into the "In" port on the Sky Box HD receiver. This cable brings in the signal to your receiver. Make sure the cable is securely fastened to the receiver, otherwise you might experience image and audio issues.
Attach an HDMI cable into the HDMI port on the Sky Box HDTV receiver. The HDMI is a single cable that provides both HD audio and video signals.
Plug the other end of the HDMI cable into an available HDMI port on the HDTV.
Power on the HDTV and the Sky Box HDTV receiver. Press the "HDMI" button on the TV's remote control. This will display the cable contents of the HD receiver onto the television.

disconnect hdmi cable and shutdown pc, completely power it off. plug your hdmi cable back in to your pc and power it up. it should properly detect your tv. i use projector mode. tv must stay on while performing this procedure.

Hi
It may just be possible that DVI signal does not convert to HDMI signal. So in theory this may not be possilbe for you to get a result with your present attempt. May i suggest connecting to the DVI port of the TV. i.e Mini Display to DVI.

Regards

the Flat Screen TV if has, a HDMI input, also has VGA Input.

You must choose :HDMI or VGA, if HDMI The VGA board must Have HDMI Connector, and you connect a HDMI cable to the TV.

The HDMI is a digital signal input/output, VGA is Analog Signal. You must have Signal Converter if you Use the 2 signals

Later MacBook (Pro) use a mini-DVI connector that does not pass analog needed for composite or S-video. Was yours ever working? And most DVI connectors do not pass sound as seen by your cabling. You cannot detect display through RCA. You just set it in Sys Prefs :: Displays, try some other settings, although your seem right.
I have a white early-2009 MacBook and mini-DVI to HDMI adapter (monoprice <$10) and HDMI cable and have not connected the TOS-link for sound, yet--just slideshows at 1920x1080. You will get a much better picture digitally. -Ken

Max does recognize receiver over HDMI-CEC.
The problem is that DVI output is for video only. Macbook won't (and can't) output audio via DVI. So yamaha receives only video signal via the HDMI connector. You can check that by pressing Option button on yamaha remote and choosing Signal Info - you will see info about video, but no audio signal present.

I had a similar problem with a Mac Mini.  The problem was caused by a mix-matched resolution (the Mac tries to use 75Hz refresh rate, TV expects 60Hz).  The best solution I found was to remote into the Mac (I used LogMeIn.com) and change the resolution on the Mac from a remote computer until the image appears on screen.
Process: 1) Connect Mac to a normal monitor and install the LogMeIn server (or other VNC type application) 2) Connect the Mac to the TV 3) Connect to LogMeIn from another computer (preferrably one where you can see the TV) 4) Go to Applications / System Preferences / Display 5) Change the resolution to your TVs native resolution, and change the refresh rate to 60Hz