Monitor won't display after changing settings

I changed the settings on my Mac Pro and apparently they are not correct for that monitor. The display is blank and now I can't get anything to display in order to reset display settings.
How can I get it to display again?

Boot into Safe Mode, and reset your settings:
http://support.apple.com/kb/HT1455

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No display after changing settings. Can't get to safe mode to change it back. Help please.

Hi,
I was trying to change my display to an external monitor going through a laptop dock. I had managed it before without the dock. I changed something in the display properties wizard and now have no display either on the external monitor, or on the built in screen. I have tried every combination of going through the dock or directly plugged in, and also with no monitor. I cannot get a display. I have tried to get into safe mode but cannot - the screen goes black immediately after the lenovo logo goes off.
It seems a bit silly that this is possible really with a "are you sure you can see this?" before confirming (like when you change screen resolutions).
Any ideas? Really stuck. The machine is only 2 months old.

Sorry. I know it hasn't been long, but I'm really banging my head against the wall with this.
Am I correct in this? The G500 can't boot from a DVD or USB stick?
I'm kinda running out of options.

How do i run an external monitor with my macbook and change settings so that when i close the lid the signal to the monitor is not lost and i can continue using the mac with a mouse and a wireless keyboard?

How do i run an external monitor with my macbook and change settings so that when i close the lid the signal to the monitor is not lost and i can continue using the mac with a mouse and a wireless keyboard?

No, nothing will prevent the computer from going to sleep when you close its display except third-party hacks that are designed to do exactly that. I strongly advise against using any of those, as they may interfere with successful entry into clamshell mode (and they carry other downside risks as well). Just wait until the computer is asleep (with its sleep light pulsing), then press any key on the keyboard. It sounds as though your setup is working as it's designed to do.

Master-detail: detail field not displayed after changed by master field

I want to use the Depends on item with Clear/refresh value functionality in a master detail situation. Within the same group it is no problem to use the setter method of a field to change a second field and then displaying this new value. But in the detail group, I can not select items from the master group as a depends on item.
In the setter of the master field, the value in a field for each row in the detail (table layout) is updated. The only problem is that this updated value is not displayed, the old value doesn't change. When saving the changes, the displayed value is committed to the database. When de updated field is not displayed at all, the correct value is saved, so I know the detail field is updated.
How can I make sure the displayed value in the detail is displayed after changeing a master field? I already gave the detail field the correct partial trigger.

Wouter,
I guese you don;t see the changed value when you display the detail item because after the depends on item update changed the detail item, JSF procesing continues and the detail table changes are sent to the server which will override again the detail item attriibute, resetting it to the old, still displayed value.
So, the trick is to get PPR working. Make sure the partialTYriggers property of the detail item is set to the value of the id property of the master item. If it still doesn't work, try setting the partial triggers property on the table, instead of the individual item.
Steven Davelaar,
JHeadstart team

Solaris 10 won't boot after changing the CPU

Hi. I was running Solaris on my Intel-based desktop machine. It was running fine. One day I upgraded my CPU and since then Solaris won't start. Immediately after it tries to load itself, it displays something on the screen really fast ( something with "dumping" in it) and then reboots.
I runned Solaris in fail safe but I cannot run reboot -r for example. It says that reboot has wrong parameter or something. And I don't know what else to do.
Please help.
Thanks.
P.S. I'm not 100% sure that the problem is related to changing the CPU. Maybe I configured something wrong when working in Solaris prior to the hardware change. But I think that's unlikely because I'm usually pay attention when changing settings in Solaris and don't dive in dark waters.

Right after I wrote my previous post I looked again at the web page Darren recommended and I figured out what it was all about. I had troubles understanding the procedure in the first place because I wasn't familiar with mounting partitions and I didn't know what /a refers to. On another site I found out about the command that saved me: mount /dev/dsk/c0d0s0 /a A bit later I found out that when starting Solaris in single user mode (failsafe for example) the partition is mounted automatically to /a when you choose to update the boot archives.
(As a tip for beginners like me, once in single user mode use the Delete key instead of Backspace :P ).
So, the procedure explained on that site is:
In case of a hardware mismatch, use one of the two methods that follow:
Method 1 (Recommended)
1.Move path_to_inst          ex: # mv /a/etc/path_to_inst /a/etc/ORIGINAL_PATH_TO_INST      2.Remove all old device links          ex: # rm /a/dev/rdsk/c* ; rm /a/dev/dsk/c* ; rm /a/dev/rmt/*   3. Rebuild path_to_inst and devices          ex: # devfsadm -r /a -p /a/etc/path_to_inst Note: If you are worried about the bootblock being corrupt, reinstall it.       # cd /a/usr/platform/`uname -i`/lib/fs/ufs
      # /a/usr/sbin/installboot bootblk /dev/rdsk/<c#t#d#s0> 4.Unmount the root slice and reboot          ex: # umount /a ; init 6Method 2
From the OK> prompt, do a 'boot -ar'.
Accept the default for all questions except the path_to_inst file.
When you get to that one, specify /dev/null.
It should then prompt you if you want to create a new /etc/path_to_inst file from scratch. Say yes.
So I tried method 1, but no success. First of all I noticed that the devfsadm command didn't create the /a/etc/path_to_inst file. As many times I have tried it (even after I read a lot more on the Internet regarding these commands) I never made it to work. Somewhere on the net somebody asked about the "-p" argument that is not explained in the man pages of the command and the answer was that it specifies the path to the path_to_inst file wich makes sense but doesn't work. Somewhere else it was suggested that the "-p" argument to be ignored and the new path_to_inst file to be looked under /etc ; this was not the case for me.
I tried method 1 many times with small variations, within the virtual or the real machine, but it never worked.
So I tried method 2 as well, but no luck either. First of all, for all other beginners facing this kind of problem, on a x86 machine there is no OK> prompt; it's a SPARC "feature". But "boot -r" commands or alike can be issued using "reboot -- -r".
So I have tried all the variations I could find on the internet -r,-a,-ra,-rav, but this command didn't work either. I always got the message
bootadm: Cannot update menu. Cannot reboot with requested arguments.I never quite figured what "menu" is all about. My guess was that it refered to the grub menu/commands for booting and that it couldn't change those. So I
read on the net a few things about the booting commands in GRUB bootloader and I tried a few variation but they never worked. Indeed the changes I did to the commands were not saved, as the bootadm erros would indicate. Am I wrong?
After reading about the GRUB commands I got a little bit more familiar to what goes on at booting time and later I found an article in the Sun Documentation called x86: How to Boot the Failsafe Archive to Forcibly Update a Corrupt Boot Archive ( http://docs.sun.com/app/docs/doc/819-2379/6n4m1vlfi?a=view ). There I so this command
To forcibly update the corrupt boot archive, type:
     # bootadm update-archive -f -R /a
Unmount the device.
     # umount /a
Reboot the system.
     # init 6I have tried it, looked like it is searching through the hard-disk, after a while finished and I rebooted but with no effect.
This is where I am now.
Any idea of why devfsadm would not create the path_to_inst file?
Any ideas of what to do else or where I could have got it wrong?
Thank you.

Won't display after startup

My Mac mini didn't display after the grey startup screen so I took it to the store. They got it working. At home it didn't work. I called Apple. They troubleshot with me on the phone then said they'd get me a new one.
The new Mac mini started up fine and worked earlier today, even with restarts, but now it is not working.
After grey startup, I get a solid blue screen, with no mouse, no icons. This is what happened before.
My display is a ViewSonic professional. It's a GREAT monitor and I'd hate to give it up.

Get this. I'm having the same problem with my ViewSonic, the second time in about 10 days, except the problem is also present when I hook up a generic display I use on an old PC. When I plug in the generic display, it puts up a message stating something like both input signals are not working.
My fix was to use a new adapter plug for the monitor that shipped with my Mac G5 at work. I plugged it in and it fixed the problem, but now it's doing the same thing. I though perhaps the ViewSonic was overloading the adapter and frying it.
Ideas?

Airport Card won't connect after changing wireless networks

Hello,
I have a black macbook with an internal airport extreme wireless card. I use the computer at school and at home. Both school and home have functioning wireless networks in which other computers are connected and running with no problems.
When I open my laptop and wake it from sleep after changing from school to home or visa versa the airport card often will not recognize the wireless network. On many occations, even when the network is recognized it will not automatically connect to it (I have it set to do). A message saying "There was an error joining the network" comes up. The only resolution has been to reset the computer (which doesn't always work) or reset the PRAM.
Sometimes after reseting the PRAM the computer doesn't even recognize that I have an airport card installed at all. When this happens I have to reset the PRAM again to resolve it.
As a final note, when the computer doesn't automatically recognize the network and I click on the desktop wireless network icon, I get the "spinning beach ball" for a period of time before the drop down box with the available networks shows up. This seems strange to me because it shouldn't be a RAM issue as I have 2GB of ram installed on this computer.
Any help would be appreciated.
K.
MacBook (Intel) Mac OS X (10.4.8)

Try the following:
Delete Preferred Network(s)
- System Preferences > Network > AirPort > Configure
- In the "By default, join:" pull-down menu, select "Preferred networks"
- Delete the network(s) you regularly use from the list
Delete AirPort Keychain Entries
- Launch the "Keychain Access" application located in Applications/Utilties.
- Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
- Restart, or log out then back in.
Add Preferred Network(s)
- System Preferences > Network > AirPort > Configure
- In the "By default, join:" pull-down menu, select "Preferred networks"
- Add the preferred network(s) using the "+" button.
- Restart or log out then back in.
If you haven't already, you may want to consider creating a network location for each (school & home) with the appropriate network settings required for connectivity at each. For each location, you can set the preferred network.

Itunes won't display after Yosemite updated to 10.10.1. iTunes will play but no display.

My Mac just updated to 10.10.1. Now iTunes won't display on screen. I can play songs by hitting the play key. If as I am typing this I click on the iTunes icon the tool bar does not show up at top for iTunes, but the tool bar will show up if I shut down safari. How do I get my iTunes app back?
iMac 2.7GHz i5 8gb 1600mHz DDR3

OPPS!! Figured it out still had second monitor cord in, and thus was it displaying on the monitor that wasn't on. Duh

Thinkcentre M57 dead after changing settings in BIOS

Hello,
I have am M57 tower that has been running great for many years but now all of a sudden after changing a few settings in BIOS (I did not upgrade the bios) all I can get the machine to do is power cycle over and over again with fans at full speed. I attempted the steps here http://forums.lenovo.com/t5/A-M-and-Edge-Series-ThinkCentre/M57-BIOS-Update-Failure/td-p/55840 but no luck. I did not change any hardware recently. I have also removed the descrete video card in it but there is no difference. When I attempt to recover the BIOS via a usb desette drive it beeps once then reads the disk for about 5 to 10 seconds with the fans at full speed. Any help would be appreshiated. I never knew you could brick a system by changing settings.

Odd that you followed procedure and that still didn't do it. Change the coin battery on the motherboard, restart pressing F1. Once into the BIOs with a new battery installed, go to the last page and select Load Default Settings, and then select F10 to Save Changes and exit. If all this was caused by a weak battery, this should fix it.
You can find coin batteries (CR2032) at Home Depot or even Walmart.

Z10 won't restore after changing BB ID

I had to wipe my z10 after changing mail addresses and forgetting my password.
I did a full back up prior to the wipe, created a new BB ID, and tried to restore. But I just get a message saying that the BB ID for all my data is different and the restore fails. What now?

JohnLH1 wrote:
I had to wipe my z10 after changing mail addresses and forgetting my password.
I did a full back up prior to the wipe, created a new BB ID, and tried to restore. But I just get a message saying that the BB ID for all my data is different and the restore fails. What now?
Do you now have a new BB ID or did you just change the password ?,
At the top of Link software, are you signed in ?
If you have different BB ID's you will not be able to restore.
Also you would not be able to retrieve your BBM contacts and messages.

MacBook Pro won't start after changing RAM cards; just beeps.

MacBook Pro will not start after changing RAM cards. It just beeps; then I force it to quit.

The three things that come to mind immediately are that the RAM card isn't seated properly (you should hear or feel a click when it is seated), the RAM is bad or marginal for that Mac model, or you didn't get the correct RAM type.

LCD monitor won't display

My Rebel won't display the live view, when I click on the little camera button all I get is a clicking sound.

I never did figure it out. When I do like the Canon instruction book says, it doesn't work. I've just been using it in the histogram mode.

Lost al .pages and .numbers docs , iphoto and office programs won't open after changing: auto startup in: startup with password. all personal settings are also gone

After i changed this setting: autologin. into login with password i restarted the computer.
it started up with a blank personal surrounding. also my .pages and .numbers documents were gone, personal settings gone, iphoto won't open and office programs wo'nt open.
in finder i can find several .doc documents and i can see that all my pictures are still on the system, But i can't open them.
i was so stupid not to use time machine. But is there way to recover the system with my documents or something??
please help.
System Imac i5 intel 21.5 inch
Software Mac OS X Lion 10.7.3 (11D50b)

Nope, without any backup they're probably gone for good. If you want you can purchase some data recovery software such as Data Rescue. I hope this may be a lesson why it's critical to backup your system, Time Machine is a good place to start.
BTW when posting please use proper grammar, it's difficult to read a post when no caps are used.
Good luck!

Desktop won't display after login window

Hi,
I'm trying to help my sister in-law with her computer (PowerBook G4). She claimed it was having a lot of problems and thought a clean install would fix things. However she had lost her install discs, and now I've seemed to make things worse.
I started by trying to back up her computer - copying the hard drive to an external HD. However I kept getting a -36 Error. I then connected her PowerBook G4 to my MacBook Pro (10.5.8 2.33 Intel) via Firewire and in Target mode used Disk Utility to make a disk image. Unfortunately I got the -36 Error again. I Repaired the hard drive with disk utility, but it said everything was fine. Then I read on the forum that the -36 Error meant that it was a corrupt file that was causing the issue. Since it always errored out in the same area, I simply deleted the folder in that area. After that, the disk image worked.
(This part is bad - I know now, but didn't when I did it:) I then put in the gray install CD from my MacBook Pro (Intel) into her PowerBook G4. I opened the system preferences and changed the startup disk from "Macintosh HD" to my install disk. I restarted the computer... it did not boot up. I connected the two laptops again and force restart in target mode. I was able to eject the CD so that when it restarted again, it reverted back to the "Macintosh HD" This is when I discovered that the gray discs are specific to computer and my plan would not work.
However, now her computer boots up to the Login window as normal... but when you login... the "blue desktop image with design" displays, but no icons appear. The computer hard drive spins, the monitor will go to sleep and wake up, the trackpad will move the arrow, but no icons and now menus?? I've left it overnight to see if it eventually will change, but nothing changes. If I press keys, the first few won't do anything, but it quickly gets to a point where it just beeps at me each time I press a key.
I can sign in using single user and already ran the fsck that is mentioned throughout the forums. It (like the disk utility) finds no errors. Any help or advice would be much appreciated.
Thanks!

Hi BD & RC,
The new user reset worked great to allow me to login again. Instead of doing a clean install, I just went through her applications and deleted ones that I thought could be suspect for some of the issues she was having. It seems to be running fine.... with one exception... the Airport won't work.
When I went into the Network settings, it was stuck in a continuous loop with the error "Another application has changed your network settings." I saw BD's help on another post to go into security and check "Require Password to unlock each secure system preference" to break the loop ( huge THANKS!!). After trying to set up multiple new locations, it finally dawned on me that the Airport was not an option. When went into System Profiler and chose Airport Card, it says "No information found."
So long story short... it appears that with all the little issues going on on this computer, the monster issue wouldn't have been solved by a clean install anyway (you were right RC)... the Airport Express card must have died.
I guess she'll either need to start connecting with an ethernet cable or buy a new airport extreme card.
Thanks for all your help guys!

System Preferences won't save after change

Hello everyone,
I am running Mac OS 10.5.8 on a Black Macbook. The problem I am having is that none my changes will save in the system preferences. For example. I change the desktop background but the background won't change. The display window in the systems preferences window will show the picture I chose, but the desktop won't.
Another example: if I turn off "spaces" in systems preferences. It will show as off in the system preferences window, but as soon as I close the system preferences window, the changes won't take affect. This seems to happen with any change to settings in the system preferences.
I have recently used both "disk warrior" and Onyx to rebuild my desktop, check my drive and everything else those applications do. But still no change.
One more hint: I deleted an application (TomTom home) from my computer a few months ago, but the old icon shows up in the Dock as a "?" after each restart. I can drag it ot the desktop and delete it, but if I restart it will always show up.
What could be wrong? Should I do a reinstall? I don't have the disks...
Thanks Mac folks!

Ok, I tried both removing the "com.apple.systempreference.plist" and restarting from both a Disk Warrior disk, and the Mac OS X Install CD 1 and doing a repair of the disk permissions. Neither of the tricks worked.
I no longer have a "com.apple.systempreference.plist" file anywhere on my computer and I still have the same problems.
So what should I do now? I have (obviously) found my original disks. I am thinking I need to do a new install of the system software? What is the process for doing that and not lose my data?
Thanks again for everybodies help.
Josh

Monitor won't display after changing settings

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