Question about Panasonic Viera TH-42PX80U Plasma TV

9 Answers

Mac Mini Hookup to Panasonic TV via DVI to HDMI failed?

Mac Mini hookup to Panasonic TV via DVI to HDMI port worked one time...then the picture became bigger than the TV screen so I changed the resolution on the MAC Mini and now the HDMI reads the MAC sign and start-up but then reverts to Hm1 port and shows nothing. I can't figure why it reads the start-up screen and then dies. I tried to change the resolution back and the desk top does not come up. Any suggestiond? Thank you.

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  • 5 more comments 
  • eporcelli Jan 21, 2009

    I didn't want to use another monitor. I wanted to hookup the mini to this TV. I have another monitor and I can check the resolution, but even if I return it to the default resolution on the mini or the same resolution as that of the TV, it still does the same thing. What can you suggest? Thank you.

  • eporcelli Jan 21, 2009

    I unplugged everything and redid everything and it remains the same problem.

  • eporcelli Jan 21, 2009

    Is there a special resolution program that will correct the problem to use with a Mini Mac?

  • eporcelli Jan 21, 2009

    I tried this, and now my monitor (Dell) wcannot accept this video setting, and I cannot get a screen on my mini mac to change the video setting on the monitor. What can I do?

  • eporcelli Jan 21, 2009

    How do you reset to factory default settings if you can get a screen to read on the monitor

  • eporcelli Jan 21, 2009

    How can you reset the Mini Mac without a monitor to view the screen?

  • eporcelli Jan 21, 2009

    Unfortunately of the four computers I have, none of them have the same cable connection as the monitor I have been using. What can I do?

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9 Answers

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  • Panasonic Master
  • 19,396 Answers

If the Mac is not showing anything, on any resolution, and you connected/disconnected HDMI cable while Mac and TV where on, then one of the capacitors on HDMI input bard may have blown.

Try connecting more devices to same HDMI port to test it.

Posted on Jan 23, 2009

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Do you have another computer you can hook up to test on the tv you are trying to use?if so i would try that to see if maybe the fault dosent lie with the mac mini itself

Posted on Jan 21, 2009

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I'm trying to follow the issue... if the mac still has a picture... put the settings back to normal.... and change the size of the picture on the tv... if you have no picture on the mac... check that the internal picture has not be shut off via the keyboard


Robert

Posted on Jan 21, 2009

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Few tvs will fill the screen (as vga does) on a native HD screen using HDMI.reattch all connection reset all settings to factory defaults
Do you have another monitor or something that's a video source

Posted on Jan 21, 2009

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  • Master
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TV's with HDMI input are expecting certain resolutions 1280x720, 1920x1080 etc, they are the standard specs for HDMI..to be outside those kinda defeats the purpose of having std TV resolutions (which are different than computer ones).

Very very few tvs will fill the screen (as vga does) on a native HD screen using HDMI. Your best bet is to use DisplayConfigX and muck around a little to get it right. HDMI will give a much nicer colourful image than vga, in my experience.

Using the zoom might be otay if you can specify the zoom ratio, a few screens can have this changed deep in the tv setup menus (usually technician type " general user not available" ones)

Posted on Jan 21, 2009

  • 2 more comments 
  • Nate Stansfield
    Nate Stansfield Jan 21, 2009

    My PPC MacMini (connected to a monitor via VGA cable) had a blank
    screen when I first rebooted after the installation (of Xubuntu). I
    pressed ctrl-alt-f1 repeatedly during the boot and got a text screen.
    After that it showed the login screen normally.

    The problem is due to the Mac mini not recognising (or perhaps the TV
    not sending) the correct mode ID details, so Mac OS picks what it
    thinks the best display mode from the list of what it thinks is
    available... which the TV doesn't support.



    The hoops I had to jump through were as follows:

    1) Connect to a "normal" CRT monitor on which I can get a picture

    2) Hunt through the Apple.com discussions for an Applescript that some
    guy wrote and made available that uses a program called "cscreen" -
    this cycles through various display modes until it receives input (i.e.
    you confirm that you can see something!)

    3) You must then take great pains to prevent the Mac from ever
    doing the display detection again - plug the plasma screen in whilst
    the Mac is on (i.e. after it has booted successfully on the CRT) and
    don't manually trigger the process!

    4) I also dosnloaded and registered DisplayConfigX which enabled me to
    manually create a 1368x768 screenmode that fits the LCD nicely (the
    closest I could get to the native resolution of the panel - 1366x768).






  • Nate Stansfield
    Nate Stansfield Jan 21, 2009

    If by chance my first solution for resetting doesn't work, you can try this:
    shut down your Mac, then press Command-Option-O-F as you start it back up


  • Nate Stansfield
    Nate Stansfield Jan 21, 2009

    MY LAST BUT NOT LEAST SOLUTION:
    I had a post about this a few months ago. I had to go step by step
    with the monitor plugged in and all black without seeing a single thing
    on the screen. I got my PB, sat it next to my work PM, then without
    using the mouse I figured the steps on how to change my screen settings
    on the PB and mirrored them with the PM. It took an hour or so, and is
    very "cavemanish" of me but that was the only thing that worked for me.
    If you don't have an extra PM here are the steps that worked for me
    running 10.3.5:



    When you start your computer the mouse cursor is just a little left of
    the Apple, move it a little to the right and click it once (don't hold
    it, all you wanna do is click it once to display the menu options
    below) after that don't touch your mouse and do the following:

    -tap the down key four times and hit enter (this selects sys pref)

    -if you haven't moved your mouse your cursor should still be over the
    apple, click the mouse button once again.(this is to highlight the
    menu's, needed for next step)

    -tap right key 3 times to highlight view menu

    -tap down 11 times to highlight display, and hit enter to select it

    -now this is tricky, hit tab then tap right then tap left then hit tab again

    -now your in the resolution section, tap up or down once then hit enter
    and it should be a different resolution and hopefully (like me) it's a
    resolution that displays something and you should be set (hopefully).



  • Nate Stansfield
    Nate Stansfield Jan 21, 2009

    Do you have an s-video port and cable?
    If you do you can hook it up to tv that way.


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Reattch all connection reset all settings to factory defaults.swithc off all then chexck .reattch all connection.

Posted on Jan 21, 2009

  • kishor khatri
    kishor khatri Jan 21, 2009

    yes u can reset all settings to factory defaults.It is actual resoluiton.

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  • Expert
  • 160 Answers

Remove all the connections and re connect them after keeping it off for a minute or two.also set the required resolution after that.

Posted on Jan 21, 2009

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  • 199 Answers

Just unplug all the connections and set it again it will create every thing new.and become proper in minutes. thanks,

Posted on Jan 21, 2009

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  • 296 Answers

The reason that the screen shows for a min then reverts is because more than likely the resolution that is set exceeds the video source. Do you have another monitor or something that's a video source.

Posted on Jan 21, 2009

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Connect you HDTV to your Mac.


One of the first things you may notice about your new big-screen HDTV is that it has more connections for video than your old TV ever dreamed about. It probably has two or three HDMI connections, maybe a DVI connector, a VGA connector, and at least one component video connection. And those are just the connections most commonly used for high definition.
It’s shame to let all those connections go to waste. Your Mac just happens to be sitting nearby; why not hook it up to your new HDTV? It's actually a pretty easy task. A few lucky souls won't even need an adapter; for the rest of us, at least one adapter will be necessary.
Pick the Right HDTV Port For best quality, your HDTV's HDMI or DVI ports are the preferred connection method. Both are capable of the same digital quality. The only practical differences are the style of the connector and the fact that HDMI supports video and audio in a single connection. If it has one, another option is to use your HDTV’s VGA port. The VGA connection isn't as good as the HDMI or DVI method, but as long as your TV supports full resolution via the VGA port, you'll be hard pressed to notice the difference. Mac Pro, MacBook Pro, Mac Mini Mac Pros, MacBook Pros, and Mac Minis have standard DVI connectors. Mac Minis and MacBook Pros have a single DVI port; Mac Pros have at least two DVI ports. If your HDTV has a free DVI port, then all you need is a standard DVD cable; no adapter is necessary. But in all likelihood, you'll need to connect your Mac to your HDTV using either an HDMI or VGA connection; both options require an adapter. If you choose VGA, you can use the adapter that came with your Mac. If you choose HDMI, you'll need a simple adapter, which is available from multiple sources. The adapter may be a cable with a DVI connector on one end and an HDMI connector on the other, or it may be a small adapter that has both types of connectors, but no cable. Either type will work fine. iMac, MacBook iMacs and MacBooks have a mini DVI connector for hooking up external monitors or TVs. You'll need at least one adapter, maybe even two. At a minimum, you'll need a mini DVI-to-DVI adapter. You may also need a DVI-to-HDMI or DVI-to-VGA adapter, depending on which port on the HDTV you choose for the connection. Make the Connection Once you determine which, if any, adapters you need, and have the necessary cable to reach from your Mac to the HDTV, turn off both the HDTV and the Mac. Connect the cable between the Mac and the HDTV. Turn the HDTV back on first. It doesn't need to be set to the connection the Mac is on, but it must be powered up first, so that when it boots, your Mac can recognize the TV and the resolution it needs. Once the HDTV is powered up, turn on the Mac. Your Mac should recognize the format and resolution of the TV, and automatically select the native resolution of the TV for running the video. In a few seconds, you should see the Mac desktop on the HDTV. Over or Underscan You may notice that the Mac's desktop appears to be slightly larger than the HDTV's screen (its edges are cut off); this is called overscan. Or, you may notice that the desktop doesn't occupy all of the HDTV's screen real estate (there are dark areas around the edges); this is called underscan. You can usually correct either issue by making adjustments on the HDTV. Check the HDTV's manual for information on making scan-related adjustments. They may be called overscan, underscan, dot-by-dot, or pixel-by-pixel. If your HDTV has a dot-by-dot or pixel-by-pixel capability, give this a try; it should eliminate any over or underscan issues. Some HDTVs only offer these special scan controls on specific inputs, so be sure to connect to the corresponding input on your HDTV. Time to Watch a Movie Once you have your Mac and HDTV working together, it's time to kick back and watch a video from your Mac. Be sure to check out the QuickTime HD trailers for a sense of what HD and your Mac is capable of. Enjoy!

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Regards

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