Horizontal display won't work

My iPhone display horizontally when I turn the screen. It did until a couple of days ago.

Check in Control Center (swipe up from the home screen) and see if the rotation lock is turned on there (an icon of a lock with a circled arrow)

Similar Messages

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?

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...

I have 2 macbooks, and my thunderbolt display won't work on one. HELP!

I have to Macbook Pros. The one for my work is connected to my Thunderbolt. When I tried to connect my personal one to watch a movie, it won't connect. I tried "detect displays" and "gather displays" - nothing.
HELP!!
Dana

Welcome to the Apple Support Communities
Note that the Thunderbolt Display can only work with Macs with Thunderbolt ports (Early 2011 and newer MacBook Pro). If your Mac is older, it won't connect to this display.
To check what MacBook Pro you have, see > http://support.apple.com/kb/ht4132 If you have a Mid 2010 or older MacBook Pro, you can't use it with your Thunderbolt Display

Why Apple Thunderbolt Display won't work on BootCamp Win7 64-bit while being plugged to MBA?

Hello,
I have MBA (latest) & installed win7 64-bit in BootCamp, I do also have Apple Thunderbolt 27" Display.
When I disconnect the ATD and re-connect it in Mac OS X, it works fine like a charm, but when I disconnect then re-connect in BootCamp, it doesn't work at all whatsoever, in fact, I have to restart my MBA (while thunderbolt is connected) to make it work in BC, this is the only way to make it work.
So, my question is; If I disconnected ATD in BootCamp then re-connected it, why it won't work?
I've googled everywhere about this issue, but no luck.
Any idea?

to calculate how much video ram is needed one
take
the vertical number of pixels and * with horisontal number of pixels and * with 32bit colour which is 4 bytes
so if it's the 13" macbook air
1440 * 900 * 4 = 5.184MB for main display
+
2560 *1440 *4 = 14.75MB for second display
sounds like the intel hd 5000 would have that as dedicated memory even if the windows driver did not allow to use shared system mem as extra
could be a problem with the driver for windows
maybe a person who ran a setup like yours would have more to contribute with
my setup is an imac 21" with amd video card and a 24" dvi dell monitor and that works fine in windows so it's a different animal altogether

HELP! Macbook Pro Display won't work!

I have a 15-inch Macbook Pro from Late 2007; it worked fine yesterday, but as of this morning the display will not work! It makes the Chime when you power it up, but no screen display; I know it's on because you can adjust the volume buttons and hear the volume beeps. The screen brightener and dimmer does nothing, as well as the keys brightener and dimmer. The apple help text said to first try restarting it, did it no change-> then unplug it and disconnect battery for 1 minute, did it no change-> reset the PRAM which I did no change, and then if that didn't work to reset the SMC which I did and got no change in my problem.
And now the part that boggles my mind is I have the cables to hook up the MBP to my TV so i figured I'd atleast be able see it on the TV if the display has crapped out on the MBP but its doesn't transmit the image to there either. So anyone got any ideas? Is it possible I caught a virus that kills displaying ability? Please help!

I'm having the same issue
it started with distorted horizontal lines across my screen, then yesterday black just like yours. I reset the pram and the power. not working, doesnt work with external monitor either. that article seems to be the answer from CMCSK's link
i'll let you know soon how it works out for me

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

External Display won't work in clamshell mode

Hi - I can't get my external display to work with the MacBook in clamshell mode - It works fine with the lid open.
I'm using it with the apple bluetooth keyboard and mouse.
I've obviously changed a setting without realising - can anyone help.
Thank You.
Ash
MacBook Pro (15-inch, Mid 2010)
Mac OS X 10.6.8

Sorry - I've now got it to work.
I don't know how - I just went through all the settings one by one, switched them off and back on again and it now works - I have to assume it is 'user error' but I can't work out which bit

External display won't work over DVI

I've got an ViewSonic vx2025wm hooked up to my MacBook Pro. It used to work fine over DVI, but some time ago the monitor stopped being able to detect the signal and I had to switch over to VGA (via my Apple DVI-to-VGA adapter). That works fine at the full resolution of the external display, but the image quality leaves something to be desired.
Strangely, the external display works just fine in Windows XP via Boot Camp. Oh, the irony!
Any ideas on how to get this working again? I dread the OS X re-install.

Same problem here. Had a Dell 30" monitor plugged in for a long time. Suddenly stopped working yesterday. The symptoms: the Mac detects the external display and "thinks" it's got it there (I can tell because the active content of the window is gone on the laptop's screen), but the display does not successfully see the output from the Mac (it shines its orange "no signal" light).
Restarting does not seem to help.
I should test it with a new display cable, but am a little reluctant to do this, as the dual link DVI cables required for this monitor are so expensive, and because previous posters on this topic have tried swapping cables with no result.

My cinema display won't work over a display port booster and extra long cable.

Hi,
I have a Mac Pro (mid 2010) and an Apple Cinema Display 27". I also have two other DVI monitors. Recently I got a few extenders, so that I can have the computer in a different room to the monitors. Everything works perfectly except the Cinema Display. My system recognises that the cinema display is connected (as it shows as a display in preferences), but the screen is black.
The series of connections from computer to screen is: mini display port to display port adaptor, short display port cable, gefen display port booster, extra long display port cable, display port (female to female) coupler, display port to mini display port.
Please let me know if you have any ideas what the problem may be.
Thank you!

Per your advice to taking out the longest cable, I ran a couple of tests at different stages of the connection. Over a short conversion to displayport and back to mini display port, the monitor connected no problem. It was only when I introduced the "Display Port Booster" that I lost signal, over the short connection.
I think the unit might be faulty and this is the problem. I sent it back to the company that sold it to me and they're running tests now. Hopefully they will be able to fix it.

Mbp fcp on 23"apple display won't work

Hi,
I'm using a MacBook Pro 17" (ATI Radeon X1600 graphics card) with a 23" Apple HD Cinema Display hooked up as the main monitor. Trouble is, when I'm in FCP HD and working with HDV HD footage (720 or 1080) I can't play any clips in fullscreen mode on the Cinema Display. It just gives me a still image.
If I play the same clip in QT Player at fullscreen/presentation mode they play fine on the Cinema Display. What gives?
If QT Player can handle the playback of these files in fullscreen on the external display, then why can't Final Cut?
and I tried this Try VIEW>>VIDEO PLAYBACK>>DIGITAL CINEMA DESKTOP PREVIEW (one of those options) and make sure VIEW>>EXTERNAL VIDEO>>ALL FRAMES is on.

Sr Speedy,
1. Well, the first 2 comments on this page might be of interest: http://www.newegg.com/Product/Product.asp?Item=14-130-220&depa=1 And, yes, I know it is not the exact same card.
2. You might get better answers here: http://member.evga.com/Community/messageboard/defaultmb.asp
,dave

Display won't work in Classic! WHY?

I tried starting OS 9 Classic on my G4 using the clear plastic Apple display. The screen was Black. I finally got my screen back up had to kook up a different monitor to fix things. For the longest i just haven't used OS 9 BUT I need to open some old 3.5 Word Perfect documents thus I need access to Classic. I now have a G5 but didn't install Classic cause I couldn't used it. Is there some way I can install and use Classic on my G5 with this old clear plastic Apple display?? Is there a driver or something that will fix this incompatibility?

Please explain.
Your wireless router is wifi.
Do you mean it works outside your home on a different wifi but does not work with your home wifi?

30" new display won't work on PC

Need help!!! Just purchased the HP D4999T PC, set it up and the Cinema HD 30" Display just shows a black screen. The power light is on, on the display and the computer is showing that the monitor is recognized. Attached an old Dell monitor and it works perfectly. The guy at the MAC store said it should work with the PC. What am I doing wrong. My graphics card is a 512MB Nvidia geforce 8800GT 2DVI. Please offer suggestions! Would greatly be appreciated.

Sr Speedy,
1. Well, the first 2 comments on this page might be of interest: http://www.newegg.com/Product/Product.asp?Item=14-130-220&depa=1 And, yes, I know it is not the exact same card.
2. You might get better answers here: http://member.evga.com/Community/messageboard/defaultmb.asp
,dave

Second display won't work on mac partition but works on windows

Hey I have a 21.5" imac from mid 2011 and have recently update to OS X Mavericks.
I bought a mini dp to hdmi to connect a second monitor up to my imac a month or so ago. At the time I was running 10.6.8 and thought that may be why it wasn't picking up the second display.
All the while the second monitor has been working fine on my windows 7 partition.
Hoping anyone can shed some light on this.
Thank you in advance for any help you may be able to give

Hello Connarhea,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/ht1573
Best of luck,
Mario

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.

Horizontal display won't work

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