Sylvania ld320ssx not recognizing hdmi for macbook

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

Vga and hdmi are different formats. Unless you are using a coverter box that translates the data from one format to another it won't work. Vga is analog and hdmi is digital

If you want to use a TV as a secondary or mirrored monitor. All you would need is a Mini-DVI to HDMI adapter. Use the adapter to connect an HDMI cable between your computer and the TV. Once connected you will have an option to use it as a secondary or mirrored (exact copy of what is on your laptop) monitor. If you have one of the newer macbook pros you need a Mini Display port to HDMI adapter.

What is the model of macbook?
read this: Apple Support Communities

that should find it automatically just turn your computer on and tv and set to hdmi 1 or whatever it should be there shoud no have to set anything up if it is a newer macbook pro or something , goto youtube if this does not work

get the appropriate dongle to adapter from your macbook to HDMI, as your TV appears to have HDMI in. Apple sells the adapter, but it is cheaper on Amazon and other outlets.

From what I can see, there is no way to stream to this TV from any computer. You'll most likely have to buy an adapter cable to allow you to connect your Macbook Pro to one of the HDMI ports of the TV.

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.

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.

Hello,
Your Macbook should automaticaly find the best resolution, if everything was OK. Is there any HDMI input on the dell projector? What projector is it? Is there is an HDMI input, you can use a HDMI to mini DVI cable: better picture and sound than VGA, and will probably solve your problem