2nd display won't work - white screen

I know this is an old issue, but I cannot find the answer anywhere on this or other discussion boards. I fixed the problem last year, but I have't had the second montior hooked up until today. I know there was a "sudo chown" type fix for this in terminal mode, but I can't find it.
help.
G4 Desktop 500 Mhz Mac OS X (10.3.9)

so do you have 2 different video cards driving two different monitors? or is it One video card with 2 displays?
the info you listed isnt very detailed but it does tell me you got an ATI video card with 16MB VRAM.
I assume that thats the Stock AGP 2x graphics card that came the The PowerMac G4 AGP graphics model.
why is your display set to 8bit depth? a stock 2x AGP card with 16MB VRAM should be able to support 16bit or 24bit depth even at 1024 x 768 res.
the info says also Core image not support as well as Quartz Extreme no supported. Which is significant because it could be why the 2nd Monitor doesnt display properly with Tiger.
under 10.2 there were less stringent requirements for driving video.
OSX 10.4 Tiger is much more advanced OS and has higher graphics cards requirements now.
I could be wrong, but I think you may need a newer video card that supports Quartz Extreme and Core image.
hopefully someone else will run by this topic and offer some insight aside from my own.

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G4 AGP Graphics - 2nd display won't work after upgrading from os 10.2

I have a desktop G4 AGP Graphics with two displays. When I was running os 9-10.2, the second display worked fine, but after upgrading the os (now running 10.4), the second display still works, but has turned gray and pixelated.
When I take a screen shot, the picture shows that both displays appear clear (and in color).
Am I missing something? Thanks in advance for any suggestions

so do you have 2 different video cards driving two different monitors? or is it One video card with 2 displays?
the info you listed isnt very detailed but it does tell me you got an ATI video card with 16MB VRAM.
I assume that thats the Stock AGP 2x graphics card that came the The PowerMac G4 AGP graphics model.
why is your display set to 8bit depth? a stock 2x AGP card with 16MB VRAM should be able to support 16bit or 24bit depth even at 1024 x 768 res.
the info says also Core image not support as well as Quartz Extreme no supported. Which is significant because it could be why the 2nd Monitor doesnt display properly with Tiger.
under 10.2 there were less stringent requirements for driving video.
OSX 10.4 Tiger is much more advanced OS and has higher graphics cards requirements now.
I could be wrong, but I think you may need a newer video card that supports Quartz Extreme and Core image.
hopefully someone else will run by this topic and offer some insight aside from my own.

I have a "white screen " ,tried to hold the two buttons down and it still won't work.The screen goes dark, then comes back white.

I have a "white screen",tried to hold the two buttons down and it still won't work.The screen goes dark, then comes back white.

Morning Clementine Lin,
For more information this, please see this article:
iPhone: Hardware troubleshooting
http://support.apple.com/kb/ts2802
Take a look at the Will not turn on, will not turn on unless connected to power, or unexpected power off section.
Have a nice day,
Mario

Display won't sleep and screen saver won't sart

I upgraded to the new OS and the display won't sleep and screen saver won't come on. Help please.

Long shot.
Do a backup.
Quit the application.
In Finder hold down the option/alt key while selecting the Go menu item. Select Library. Then go to Preferences/com.apple.systempreferences.plist. Move the .plist to your desktop.
Restart the computer, open the application and test. If it works okay, delete the plist from the desktop.
If the application is the same, return the .plist to where you got it from, overwriting the newer ones.
If you want to make your user library permanently visible, run the below command in Applications/Utilities/Terminal.
chflags nohidden ~/Library/
You will need to do that after any updates.

Od classic all i'm getting on the display is a blank white screen, itunes recognizes it but is only displaying 127gb free even though it's empty and should be 148gb free

after replacing both the logic board and hard drive on my ipod classic all i'm getting on the display is a blank white screen itunes recognizes it after a restore but is only displaying 127gb free instead of 148gb. the hard drive is a brand new 160gb the logic board came from a working 6th gen 120gb ipod classic

Will,
"I thought you bought the entire display and had two LVDS cables?"
Right, but I mean I think the connector on the logic board might be detached/broken. When I tested the old display, I completely removed the new one, cables and all, and connected the old one with the original LVDS cable. So these symptoms are independent of the lcd/cables that I use.
Yes that socket could be bad and this:
Even the random distorted coloration on the cracked lcd was replaced by blank whiteness.
would point to that problem. Did you try messing with that connector when it's powered up?
I'm not sure I follow. By "completely black screen" I meant no backlight...
Detached GPU a.k.a ball grid array ATi chip:
-computer boots, with chime
-distortions in color
-flickering lines
-cycling through red, green and blue
-ultimately a blank screen (but still backlit?)
I have an ATI 9200 GPU chip that failed in a way I call "black moving shadows"
Detached U28 chip the Danes mounted a complaint about:
-computer will not boot, no chime
-loud constantly whirring fan
Right that pin 15 I talked about. Relatively easy to solder back.
-maybe will boot if clamped on left of trackpad, but with intermittent graphical distortions
No there would be no graphic anomalies in this failure and clamping left of the track pad is a problem since that's where the hard drive is. The pressure should go on U28 as indicated in the Cory Arnold site better resolder pin 15.
I guess I just want to get this all sorted out for posterity.
OK. If you hit a wall you could send it up here and I'll take a look.
Richard

Help please. Extended display won't work on MBP and AOC 20" 1600 x 900 60HZ monitor. Mirror display does. I've a mini dvd to vga converter cable. Should this work?

Help please. Extended display won't work on MBP and AOC 20" 1600 x 900 60HZ monitor. Mirror display does. I've a mini dvd to vga converter cable. Should this work?

I have the same mini display port adapter and Belkin DVI-HDMI cable (but a Panasonic 42" Plasma HDTV) so just set this up on it to see if I could duplicate your problem, unfortunately for you (but good for me) I can't.
I connected the adapter+HDMI cable before switching the HDTV on and then powered up the MBP. It (the HDTV) came up with my background right away (it's set at Mirror not extended Desktop) and when I run System Preferences/Displays get the following. Sorry but all I can confirm is that adapter+cable combination should work ...
Try doing a Parameter RAM reset - hold down command/option/p/r keys at start up and wait for three chimes before releasing the keys?

I set up a new airport time capsule. Most devices work fine however now my apple tv 2nd gen won't work.

I set up a new airport time capsule. Most devices connected fine however now my apple tv 2nd gen won't work. I turn it on and it searches for time and date but goes no further. I can't by pass it either. Any suggestions?

I can't by pass it either. Any suggestions?
Does that mean you cannot move it to the TC and plug in by ethernet? What does bypass mean?
I would still move it closer to the TC.. and just trial it there. Range on some AC models for 2.4ghz is worse than old one. For some people.
Another thing to try is fixed wireless channels.. one of the very few options still available in the AC model.. lock the 2.4ghz to 11, 6, 1 .. try it in that order.

My ipod model A1367 display shows only a white screen. why is it?

my ipod model A1367 display shows only a white screen. why is it? please help me im using apple product for the first time

Try:
- iOS: Not responding or does not turn on
- Also try DFU mode after try recovery mode
How to put iPod touch / iPhone into DFU mode « Karthik's scribblings
- If not successful and you can't fully turn the iOS device fully off, let the battery fully drain. After charging for an least an hour try the above again.
- Try another cable
- Try on another computer
- If still not successful that usually indicates a hardware problem and an appointment at the Genius Bar of an Apple store is in order.
Apple Retail Store - Genius Bar

2nd Monitor won't work

I bought a Pavillion p6210f last week with Win7 loaded to replace my Dell/Vista. I was using two monitors with a VGA port and DVI port on the old PC, so I tried plugging in the same on my new HP and the DVI would not fit. In examining the pins I found that, althought the Manual said DVI, but the plug has the pin/bar arrangement of a DVI-D. So, I bought a VGAto DVI-D adapter and everything plugged in snuggly. All pins and bar appear a match.
But, it won't work. This is what is showing
NVIDIA nForce Serial ATA Controller HP RC Mirror Driver [Display adapter]
NVIDIA GeForce 9100 [Display adapter]
Acer P241W [Monitor] (24.0"vis, s/n LB4040014320, March 2008)the one working monitor....
After hours with the 800 support and hours of reversing the two Acer monitors, the DVI-D port is simply dead. Anything plugged in to the VGA works fine, anything and any combination plugged into the DVI-D and cable switching etc. the 2nd monitor is not even recoginized. The NVIDIA control panel doesn't recognize it. The amber power light just stays that way and nothing ever flashes on the 2nd screen. That is, it is the same as not plugging in at all.
I was less than pleased when 800 tech and supervisor suggested I take it to a repair center. A week old? I have put way too much setup and data transfer into the new HP to go back to the retailer for a replacement.
Techs didn't know, but could there be a DVI-X with the same pins that also fits

Eldric, did you update to the latest video driver from nVidia? It sounds to me like a driver problem. Update and let us know if that solves your problem.
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External display won't work on Window

Hi can anyone please help me in this? when I using window XP, my external display won't display out but when I'm using MAC OS X it work well, why? please help... Thanks

I can only help if you are using an NVidia graphics card, as with that you can use the NVidia Control Panel to setup the external display.
Connect the display
Start NVidia Control panel
Select the Display icon
Then select Change Display Configuration
There you can set the resolution, extend the screen or create a copy et.c.
Hope that helps...

IMac 27' (year 2010 - Snow Leopard) won't boot - white screen only

Hi,
my 2010 iMac 27in running Snow Leopard won't start - when I switch it on, I can hear the chime, the screen goes white and gets stuck at this (no Apple logo, no question mark, no mouse pointer). I have waited for minutes but it's definitely stuck.
When there is a DVD in (tried both OSX Instal and Apps Instal), I can hear the drive reading for a few seconds, then it goes silent.
I have found a few similar topics in this and other forums - the issue was solved or helped by entering one of the special boot modes via keyboard shortcuts upon startup. In my case though, none of these shortcuts work - with the sole exception of Cmd+Alt+P+R to reset the NVRAM. What I tried was: C, D, Alt, Eject, N, T, Shift, Cmd-V, Cmd-S ...none of them has any effect.
I learned there are some issues with a wireless keyboard when using these shortcuts, so I got a USB one to rule that out - but it didn't help.
In the beginning, I heard "clicking" noise I am not used to hearing - so I suspect a HDD failure but it would surprise me the machine would not indicate that in some better way than a blank white screen. The clicking then went away - could be after I did the NVRAM reset - not sure.
I also performed an SMC reset by unplugging the power cord for a while - no effect.
As per one recommendation, I tried NVRAM reset a few times in a row. Didn't help but, interestingly, I found that after 3 such resets, holding D will eject the DVD (without the 3 resets, "D" won't do it). Prior to that I had no way of getting the DVD out.
The computer was running fine before I switched it off for the night on the previous day. There was no system update, no change I am aware of.
The only thing beyond default is extra RAM but that has been there for months now without problems (and just to be super sure, I removed the modules but no effect).
At this point I have run out of ideas - any suggestions are very welcome.

Some things you can try.
Startup Issues - Resolve
Startup Issues - Resolve (2)

Imac [plus 2nd display - can you work with one display rotated 90 degrees?

I'm thinking of getting a Dell Ultrasharp 24" monitor to use as a 2nd screen from my iMac 20". The Dell screen seems to rotate 90 degrees so you can view it landscape or portrait. If you're working with 2 displays functioning as one giant desktop, can you rotate the 2nd display 90 degrees, and still use the 2 monitors as a giant desktop?
Any advice much appreciated - thank you!

Leopard has a built-in feature for rotating the display. It's in System Preferences Displays pane. You can select to rotate the image 90, 180, or 270 degrees. It even works for my massive 21-inch CRT that I use with my iMac as the extended desktop, although it would be very difficult to physically use that monitor in portrait orientation.
So what you are describing should work.

Multiple display won't work

I have connected two different monitors to my late 2009 IMAC. The multiple display works fine but when I shutdown the computer the secondary monitor won't wake up unless I unlug the video cord and plug it in again. Any solutions?

Hi Michael, thanks for your reply.
Regarding the GPU failure, I had my doubts about this simply because the external display at any resolution and 'screen share' are fine and that would seem to imply the GPU itself is fine.
I don't have an answer and I suspect it's going to require a new logic board, but from what I know that is an expensive fix and that would be unaffordable meaning the MBP will effectively become a MacMini which I'd really like to avoid.
Is there anything else I can try?
Simeon

IPad does not display anything !! (white screen)

Hey,
I have a strange problem with my iPad(16GB WiFi). It turns on but the screen turns white (nothing display… Not even Apple logo)!!
It responds to my interaction … For instance, I can slide to unlock it (of course, I cannot see it but I know where it is located)
I try to restore it through iTunes, it did but it does not fix the problem !!
In other words, everything is working but you cannot see anything on the screen.
Please help !!??

Searching broadly through discussion areas, such as Safari, iPhone, Mac, etc. getting a white screen is common. Apparently this can happen while logged into sites such as Google. Apple seems not to know or care about this issue, since no one from Apple answers any of these messages.
I managed to bring back Safari from the dead by going to iPad Settings for Safari and cleaning out Cache, Cookies, History. Don't know why this helped.
Am wondering what would happen if I downloaded Firefox to my iPad and started using it instead. Firefox has worked wonderfully on my other machines - Mac Pro at work, Windows 7 at home.

Imac G5 won't start white screen and flashing question mark

tried every key combo recomended - erased HD using target mode/firewire with laptop - but won't boot up from install disc...

The white screen with flashing question mark means that it cannot find a bootable volume.
The iMac G5 will not boot from just any install disk. Ideally, use the grey restore disks which came with the computer. If you've lost these, you can order them direct from Apple. Alternatively, a Mac OS X 10.5 retail install DVD will work provided the iMac G5 has also 1GB RAM (minimum requirement for 10.5).
Sometimes, if the internal drive is faulty, it can take a long time for the computer to recognise other disks. I would suggest holding down the option key on the keyboard (labled alt on some keyboards) and turning the computer on, keep holding alt until you get to the early boot menu, insert your DVD/CD, and click the circle arrow to refresh, wait a bit and the DVD/CD will show up and you can click on it to select it and boot from it by pressing the straight arrow.
After a little while it will get to the install menu, select your language, then on the next screen go through the menus to find "Disk Utility" (it's in different places on different versions of Mac OS X).
You will want to check that the internal hard drive is detected, and that it doesn't have a SMART error (it might be red, or say that the disk is failing). If you get that far, then (assuming you have erased the disk previously, as this will step really will erase the drive and take all your data with it) partition the drive, making sure that under 'Options' you select Apple Partition Map (this will be the default on earlier versions of Mac OS X, but might not be if you've erase the disk from an intel Mac like a MacBook).
Once, you done all that, and there haven't been any issues, you should be able to quit Disk Utility, and carry on with the sytem install as usual, and a 30mins to 2 hours and reboot later you should be booting from the internal drive again.

2nd display won't work - white screen

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