No Signal on HDMI TV After Lion Upgrade

Hello All,

I HAD the same problem but with the help of apple I solved the problem.

I have a Philips 37pf9730-11

Hope this solution will work to you all also:

Important connect the mini to a working screen and do this dutch and english

2- open de Terminal ( die vind u in de map programma's / Hulp programma's , of via de Spotlight)

Open Terminal

4- Tik in cd(spatie)/ (enter)

Add: cd(space) /(enter)

3- Tik in de Volgende regel/Add: cd /System/Library/Displays/Overrides/DisplayVendorID-410c/ (enter)

4- Tik in de Volgende Regel/ add: sudo mv DisplayProductID-0 DisplayProductID-0.old (enter)

5- Vul uw wachtwoord in

add your password but you will not see it ( u zult niet zien dat u iets intypt)

6- Herstart daarna uw mac.

restart mac mini

7- Sluit de Mac af en sluit hem aan op de TV.

Connect you mini to the tv and he will work hopefully

Best regards and good luck

Marcel

Hi Mac80

I have been struggling for the past couple weeks since I purchased my Mac Mini (a few weeks back) to connect to the Samsung B2430 LCD monitor directly via HDMI-HDMI but to no avail i.e. "no connection detected"

Fyi HDMI-DVI works, but I just wanted the HDMI-HDMI instead.

I did exactly what you advised i.e. pull out the HDMI cable from the Mac Mini; power up & power down the Mac Mini; reconnect the HDMI cable to the Mac Mini; power up again... Wooa...lla... for some strange reason & though somewhat "primitive":-) ... It works. It can now detect my monitor at 1080p. I just shut down and switch it on again to make sure that it is not a fluke, it works!

Fyi I just acquired another Samsung LED 27" monitor SA550 (same problem as above inititially but got it working via the above approach)

Thanks alot Mac80 and really appreciate it!

jJpecke

When you get "Video Format Not Supported" or "No Signal" or blank or blue screen just turn off the TV, unplug and plug the TV power cord and turn it on again.

Don't do anything with your mac. It always works for me.

I have a mac mini 2010, osx Lion and Philips 32pfl3404/77.

Good luck!

I had the same exact problem after upgrading - wish I had seen this thread before I did.

But .... seems I am not having this issue any longer - here is what I did.

Downloaded the EFI 1.5 patch for MacMini

Ran Software updates to get to 10.7.3 and every other update that was available.

Rebooted after update

Updated the EFI 1.5 rebooted

Ran saftware updates once more, said all was up to date.

Each reboot since has worked with HDMI cable attached.

My Configuration, just so you all know did not change from the Snot Leapord to Lion upgrade. I plugged in a RGB monitor to the miniDisplay port during this process.

Mac Mini Plugged into Denon 2112 reciever which is plugged into Epson Projector all via HDMI.

Hope this helps someone else - this is my first post here on these forums.

Thanks,

-rp-

I have a workaround, it ***, but i couldnt stand it anymore... I had an unusable media system otherwise.

I purchased a toslink cable (minijack -> optical audio) and placed the macmini hdmi directly on the tv (pioneer kuro krp500).

Now it works, Video goes off the TV and audio goes out of the received via the optical audio.

When I contacted Yamaha they told me it was a faulty receiver (which is not). I tried with 3 different hdmi cables, one of them 1.4 with return audio, and a minidisplayport to hdmi and all had the issue. All those cables handshake perfectly with other devices and the received, except the macmini...

Guys, try resetting your Mac's PRAM and NVRAM.

http://support.apple.com/kb/ht1379

It worked for me until now..

I had the same problem until I booted while resetting the parameter ram. Hold down Coomand+P+R keys while booting and you'll probably be ok.

I am having that same issue with my mac mini. I tried two things one of which or maybe both worked. I first tried to reset the PRAM and NVRAM. This allowed me to boot into recovery mode, but did not transfer my account. I then restarted it and waited to plug the HDMI in for about 2 minutes. When I did plug it in, it worked fine. Until this is fixed I will be avoiding a restart at all costs. Hopefully this helps.

If you have Screen sharing enabled in System Preferences > Sharing on the Mini, just click on your Mini in a Finder window on your Pro and at the top of the right pane you should have two buttons, Connect As and Share Screen. I always have it enabled since it's the easiest way to get access to my Mini when I need to do something that requires a keyboard or mouse.

Message was edited by: Jarek91 (corrected button name)

Update - I have mine working on my Phillips TV via HDMI. I enabled screensharing while it was connected and working on our Toshiba TV. On the Phillips I changed its settings to:

Display Tab

Resolution: From 1080i to 1080p

Refresh Rate: 50 Herta (PAL) to 60 Hertz (NTSC)

Rotation: Standard

Underscan: 6th mark from the left (right in the middle)

Color Tab

Checked Show profiles for this display only

Selected: HD 709-A

to fix hdmi problem with mac mini and lion, follow me:

step 1 turn off mac mini.

step 2 unplug the power cord

step 3 hold power button with it unpluged for 10 or more seconds

step 4 plug in power cord

step 5 turn on computer and hold option, command, the letter R, and the letter P till computer bongs a second time.

step 6 after second bong hold shift key till a grey bar appers with apple logo.

step 7 alow to boot till you see your sign in info. (dont bother signing in.)

step 8 click restart mini

i got this from apple for my own mini. no problems now!

After my recent research, EDID issues among computers and AVRs is a common problem with both Windows and Mac OS. Computers may be compliant, but struggle due to their ability to adjust their frequency or resolution. For me, hdmi direct into the TV was worked without an issue. It's when shaking hands with the AVR and then trying to shake hands with the TV that caused problems with both Snow Leopard and Lion. For about a week, Lion was working fine. But we had a power outage and it all went sour again. It was frustrating during a movie when Ihad several people wonder why it doesn't just work. I could have just plugged the hdmi into the TV and then used the optical into my AVR. That worked under every circumstance. But I wanted the ability to have one hdmi from the AVR to the TV and be able to easily swith from Uverse TV, PS3, and my mini. The Pioneer AVR has an pretty cool app for the iPhone/iPad that works under this sceanario. The price of the Gefen product was worth it to me. If you don't want to pay for an EDID dective, why not just plug your hdmi direct into the TV?

I bought a Mac Mini (2011 - 2,5 GHz Dual-Core Intel Core i5) last Saturday here in Germany. It had Lion OS X 10.7 installedand and I had no chance to get a picture (after the white boot screen) on my Philips 42pfl9903H Aurea (HDMI to HDMI). Yesterday, at the Genius Bar in Oberhausen, we upgraded to 10.7.2 and Efi Firmware 1.4. Everything seems to be fine now (1080P 60Hz)! By the way, the update also removed obvious bugs with the Thunderbolt Display which we used during the process.

Well, now my shared screen solution isn't helping anymore either...

But, by pulling the HDMI cable from my Mac Mini and putting it back in, I get the connection back. Sounds a bit 1970's, I know, but as long as there's no fix (or at least some feedback on the issue) from Apple I'll just have to pull the plug.

As for the copy protection you're talking about Ziatron, I sure hope this isn't the case. That would just be TOO stupid! A copy protection courtesy of Apple that makes my Apple product malfunction...?

As mentioned in my previous post I did as Gogolathome suggested and changed the HDMI cable. Not only did this fix the flickering problem, it seems like the loss of signal is solved as well. Been over a week now without problems.

So just make sure you have a good quality HDMI cable.