Submit Hint Search The Forums LinksStatsPollsHeadlinesRSS
14,000 hints and counting!

Solve a Mac Mini invalid resolution issue after install System
After I installed 10.6 on a couple of my Macs, I had problems only with my (current generation) Mac Mini that is connected to a Dell television. I could not get any video after rebooting, turning off the TV, etc.

Since I have multiple Macs, I connected to the Mac Mini via Screen Sharing and went to the System Prefs » Display panel, and selected my previous resolution setting. This made the video work right away.

Without a second Mac, I have no idea how someone could fix a problem like this.

[robg adds: This should work for any installation that selects an invalid resolution.]
    •    
  • Currently 1.50 / 5
  You rated: 2 / 5 (10 votes cast)
 
[14,821 views]  

Solve a Mac Mini invalid resolution issue after install | 12 comments | Create New Account
Click here to return to the 'Solve a Mac Mini invalid resolution issue after install' hint
The following comments are owned by whoever posted them. This site is not responsible for what they say.
Solve a Mac Mini invalid resolution issue after install
Authored by: cbucheli on Sep 04, '09 10:39:16AM

Similar issue with a Sharp Aquos. Invalid resolution/Cannot be displayed.

I had to resort to hard powering off/on the mini with the TV powered on and active. On the subsequent reboot, I received valid signal.



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: Anonymous on Sep 04, '09 10:40:22AM

Maybe through "safe mode"?

Can you do screen sharing from a 10.4 machine?



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: tak on Sep 05, '09 01:38:03PM

> Can you do screen sharing from a 10.4 machine?

Apple Screen Sharing is a feature of Mac OS X v10.5 and above. But on v10.4 you could try with Apple Remote Desktop or VNC.



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: David Allen on Sep 07, '09 05:51:39AM

I can screen share from an iMac and a Mac mini, both running Leo, and now Snow Leo, to an iMac G3 running Tiger, but I have not figured out vice versa

---
David Austin Allen
Monterrey, NL, MX



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: digitalcowboy on Sep 04, '09 11:38:18AM

I had the same problem but I haven't replaced my old 32" CRT yet. My 2009 mini is connected through Mini Display Port to VGA and then a VGA to S-video adapter. (I know. I've been too cheap to upgrade my TV just yet and it works just fine.)

I assumed my weirdo display set up was what caused my problem and it took me a couple of reboots of the mini and a couple of reboots of the analog VGA adapter to get it to even recognize a display was connected so that I had the resolution options I needed.

---



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: cammac on Sep 06, '09 09:17:45AM

i doubt that you will get a signal. afaik there is no analog support for tvs over the mini-dp/vga adapter. tell me more please.



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: David Allen on Sep 07, '09 05:57:00AM

A number of folks with '09 Mac minis have reported that this works; mini-DisplayPort to VGA adapter, and then VGA to S-video cable.

BTW, the mDP is digital unless you connect the mDP to VGA adapter and the electronics in the adapter keys the Mac to switch to an analog output.

---
David Austin Allen
Monterrey, NL, MX



[ Reply to This | # ]
NVRAM reset
Authored by: avramd on Sep 04, '09 01:02:48PM

All macs have some sort of magic incantation to reset their key variables, NVRAM, PRAM etc. The boot video resolution is one of these variables. When cleared, it defaults to something extremely common that is likely to work with any display.

The incantation is different from mac to mac. Sometimes it's reboot while holding down cmd-opt-P-R. For the last couple years, it's been power-off, remove battery if it's a laptop, then hold down the power button for 5 seconds.



[ Reply to This | # ]
Various reset methods
Authored by: tak on Sep 05, '09 02:28:10PM
The incantation is different from mac to mac. Sometimes it's reboot while holding down cmd-opt-P-R. For the last couple years, it's been power-off, remove battery if it's a laptop, then hold down the power button for 5 seconds.
Clarification: Command, Option, P, and R for resetting PRAM and NVRAM works on all Macs: 68k, PowerPC, and Intel
http://support.apple.com/kb/HT1379

Removing the battery and holding down the power button for 5s resets the SMC but it only works on some specific machines. And it should not be done arbitrarily regardless what Mac we are talking about.
How to and when to reset the SMC/PMU on Macs of this decade is explained here:
http://support.apple.com/kb/HT1894

[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: acalado on Sep 05, '09 04:14:25PM

Some other options:
1. Try to reboot in safe mode (hold shift key during boot).

2. If remote login is enabled, ssh into the Mac and delete the following files:
/Library/Preferences/com.apple.windowserver.plist
~/Library/Preferences/ByHost/com.apple.windowserver.*.plist

3. If you've created any custom monitor resolutions using third party video tools like DisplayConfigX or SwitchResX, delete the custom monitor profile(s) in /System/Library/Displays/Overrides/, named DisplayVendorID-xxxx. Should be the newest created file if you sort by date, it's date will be much newer than the rest. The OS installed ones should be oldest and all have identical creation date/time so your custom one(s) will stand out.



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: David Allen on Sep 07, '09 06:38:16AM

I had a similar issue after installing Snow Leopard on my '09 Mac mini. After the new OS booted the screen resolution was wrong so I went to System Prefs/Displays and selected what I thought I remembered was the display for my LG HDTV. WRONG! Black display with the LG's display flashing Invalid Signal.

I brain stormed for a moment and thought, aha, Screen Sharing from the iMac used by younger household members. It was a no go. It would not Screen Share. Then I remembered that I had allowed the iMac to Screen Share with the Mac mini, but not the Mac mini with the iMac. Why would I want the young ones spying on me?

I could connect with the mini, just not screen share, but how could that help me? Then I thought, there has to be a system preference for Screen Sharing. It is ~Library/Preferences/com.apple.ScreenSharing.plist. I experimented with the iMac. Sure enough, if I disabled Screen Sharing and Trashed that file, that file did not return on a restart. But if I enabled Screen Sharing, that file was created.

So I connected with the mini from the iMac and dropped that file in the same location on the mini and did a hard shutdown and then restarted. As I did it I thought, "Dios mio, this will either really screw the pooch, or this will be my miracle idea!" On yje mini's reboot, I could Screen Share with the mini from the iMac and I resolved the Display Resolution in about 15 seconds.

---
David Austin Allen
Monterrey, NL, MX



[ Reply to This | # ]
Solve a Mac Mini invalid resolution issue after install
Authored by: mikezang on May 23, '10 05:10:59AM

Hi, all experts

I am a newbie for Mac, I have a lot of years experience about Windows. I bought a Mac mini (later 2009) yesterday and connect it to my Sharp AQUOS TV using a Mini DisplayPort + USB sound to HDMI adapter with a HDMI cable.

After I boot my mini, the TV shows "Invalid video signal, check input signal" then black screen.

I guess the reason might be my AQUOS only supports 1080i (not 1080p) and Mac mini set default HDMI to 1080p automatically.

Then I have only a USB wireless keyboard, so that I can boot in safe mode, and my AQUOS have 2 HDMI, one d4,one s2 and one VGA ports, the VGA and mini plug are used by my ThinkPad, so I have to use other ports, what can I do?

Yesterday was a bad night for my first Mac night!

Please help me, all of you , Mac experts!

By the way, I went to Apple Store, they didn't have AQUOS and not solve my problem, that is very sad, now my Mac mini is just the box!



[ Reply to This | # ]