IMac :: Secondary Monitor Not Working - Only Shows Black Screen
Jun 10, 2010
24" iMac running 10.6.3 and having some issues all of the sudden with my secondary monitor. It detects the display and the monitor comes out of standby, but only shows a black screen. Tried it with another monitor to see if that was the issue but it's not. Seems as if the iMac is sending bad video signal out... Couldn't find anything similar on a quick google search so I thought I'd try here to see if anyone had any similar problems.
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Feb 2, 2009
we are trying to hook up our TV as a secondary monitor (for hulu, netflix, etc) but it defaults as the primary monitor. We would like to keep the imac as the primary monitor, and have the TV as a secondary, but cannot figure out how to do it! The only way we can get the imac back to primary status is if we use mirror mode. Once we take it off mirror mode, the TV becomes the primary monitor again, and there appears to be no way of switching it in OSX display preferences.
I've done similar hookups with my laptop, and the TV defaults as the secondary monitor. Why isn't this happening with our iMac? Any ideas?
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Nov 22, 2010
Just installed Windows XP using bootcamp and usually no problems switching between operation systems. Recently started using an USB modem for my wireless internet connection. Internet works on both Mac and windows through the modem. Now the problem is whenever I restart or switch on my computer, it shows a black screen if I choose windows partition to boot. No problem if I start through mac partition. If I unplug the USB modem, everything goes fine and I have to plug the modem after starting windows. Is there any solution so that I can permanently plugin the USB modem and avoid booting problem?
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Apr 17, 2010
im not 100% sure this is the right area to post this in but i have a 15 or so inch hp lcd monitor i wanted to use as a second screen for my imac via vga, so i was wondering if that kvm switch would alow me to have this setup
imac - (vga adapter) - Kvm switch - moniter and surround sound / xbox 360 - (vga adapter)
and the second part is... it says it is powered by bus does that mean it would be powered by the moniters or what?is that a bad idea? will it strain my imac or what.
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Feb 3, 2012
Desktop restart shows flickering black/white screen, then black. Could not restart.
Info:
iPad 2, Mac OS X (10.6.6)
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Apr 22, 2009
I have a late 2008 white MacBook, and will soon be expanding desktop space with a secondary monitor. However due to a small and cramped desk, the only place the monitor will sit is above the macbook on a shelf. When I've seen examples of external monitors for MacBook's, they have always been to the right or left of the notebook itself. Is it possible to configure so that the monitor will be recognised as above the MacBook?
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Jun 23, 2010
I know the iPad just got an App where it allows you to use it as a wireless secondary monitor. So I'm wondering, such technology should be available for the macbook too right? I know it's a bit sluggish, but here at work I only have 1 monitor and I do a lot of coding/multitasking work and if I could use my laptop as a secondary monitor (wirelessly/wired), that would be great. My work PC has Windows on it though, so that's something to note.
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Oct 27, 2010
So, I'm not really expecting this to actually work, but is anyone aware of any way I can use my 20" Mid-2007 iMac as a secondary monitor for my Mid-2009 MacBook Pro without any wires and for free?
I add for free because I heard something about a program called ScreenRecycler or something like that, which costs money and thus I am not interested.
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Apr 18, 2010
Can I use my Dell Lattitude D630 as a secondary monitor for my iMac? The port on my laptop is a VGA.
Is this possible? if so what kind of cord would I need?
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Dec 21, 2009
I'm sure this should be simple but I can't figure it out.
I have my iMac connected to my TV and am using Plex to watch stuff on the TV.
What I'd like to do is turn my imac screen off without turning off the second monitor output (i.e. tv) as the imac screen is a bit bright/distracting (even on lowest brightness) when watching in the dark.
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Apr 29, 2012
YouTube shows a black screen and i don't know how to fix...
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Mar 12, 2012
Recently my Mac has been extremely unstable. It keeps freezing up and hanging for no reason. Initially a 3 beep would sound off, I ran some tests like the apple hardware one and realised that one of the rams was bad. I bought 2 new sticks of ram and replaced it. Following which, the mac still freezes up and a 3 beep alarm sounded off again.
Currently, I'm trying to turn it on, no 3 beep signal is sounding off but the Mac either keeps freezing and showing a highly pixelated screen or a black screen surfaces. There is some sound coming off from the laptop as well. Each time I switch on the system, it just shows a black screen with no display.
The Mac is a 15'' 2.66 MHz i7 which was manufactured in the mid 2010s.
The 2 new sticks of ram are Strontium 1066Mhz 4Gb x 2 sticks.
In the initial stages: kernel panics were common as well.
Info:
MacBook Pro (15-inch Mid 2010), Mac OS X (10.6.8)
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May 21, 2008
i don't know what I did, but for some reason, new windows on firefox opens on my laptop monitor (instead of my 20 inch LCD, I am running dual screens).
1. I am running dual screens, but my EXTERNAL monitor is the primary one (top menu bar is on the external monitor)
2. All applications open by default on my main monitor, except for FIREFOX.
3. I have tried dragging the firefox window back to main monitor, both in spaces view as well as normal view, to no avail.
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Dec 8, 2008
Today, I bought a vga adapter for my unibody macbook and it is not working. I hooked it on a 22 inch Samsung 225MW screen and it the screen shows a message "check your cable (PC)".
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Jul 6, 2012
Why does my screen only show black when i try to play a movie downloaded form itunes?
Info:
MacBook Pro, Mac OS X (10.7.4)
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Jan 31, 2010
I have a Mid-2007 Mac Mini and I've noticed every couple days, when I log out of the secondary account, it takes a relatively long time to return to the login screen. The blue screen sits there for maybe 30 - 40 seconds, but then when it returns to the main screen the whole machine freezes. The only thing I can move is the mouse, I can't click any of the buttons such as restart, sleep or get back into my account. I always have to do a hard shutdown.
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Jun 17, 2014
I have a samsung display and I can see the cursor, but nothing i drag and drop over there is showing up. if I drag a tab over, I can see the cursor but not the page, just blackness
Info:
iMac, OS X Mountain Lion (10.8)
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Dec 27, 2010
Yesterday I was watching a film from an external hdisk with VSL program.I had connected my Macbook pro to my LCd tv with a DVI/HDMI cable.When the film finished i went to another room to do something and when i came back the monitor and the tv were black . I pressed the esc key but nothing.I pressed the power button off and on again but nothing.The mac is sleeping.I disconnected the battery but nothing.
My Macbookpro is three years old and this is the first time that i have a problem.I tested a lot of combination of keys ,something like the ctrl+alt+del in PC but nothing.
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Jul 9, 2009
So I had a recently purchased 17" BTO with the 7200RPM drive that worked great, but with one issue - the display would have horizontal scan lines and black out occasionally. So I called up Apple and eventually managed to get a cross-ship set up(they let me hold on to my current unit, charge my credit card and send me a second brand new 17" unit as a replacement,and then refund me for the second 17" after I send back the defective unit).
Anyway, the replacement unit looks great, but with one issue - there's a very small light dent on the bottom panel(maybe about the size of a dime). I was annoyed but don't think this is worth having to exchange, since I could probably just unscrew the panel and pop it back into place.
However, what really got to me was the fact that my replacement unit was slightly louder than my original - my original is so silent that I can't even tell it's on. However, with my replacement unit, I can hear the hard drive spinning, which is slightly annoying.
Anyway, I proceeded to restore from a time machine backup and test my replacement unit when I noticed that it would occasionally get the hard drive click + beep + freeze issue that many others who have the 7200 RPM drive seem to be facing. It's extremely annoying, and more importantly I miss the complete silence of my older unit.
My question is, while I'm still in possession of both units(which both have the exact same specs, same 7200 RPM drive, etc.), should I simply just open both up and take the silent(good) hard drive from my old unit and put it into my new one?
The click+beep freeze issue is really pissing me off, and my old unit didn't suffer from it - it's just this replacement one(doesn't make any sense).Anyway, would notice if I switched the hard drive? Would I get screwed somehow? Do they keep track of the hard drive serials or something?
I really don't want to go through the pain of sending this back, especially considering that a LOT of people are suffering from this issue, and I don't want to end up with another defective drive. I'm sick and tired of games and just want a computer that WORKS.
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May 24, 2012
I came back from work to wake up my iMac. It made the noise but the screen stayed black. I tried restarting by holding the power button- I can hear it start and the chime but still have a black screen. I tried resetting the pram, and unplugging the cord but I still get a black screen. I can hear the chime though; I'm not sure if that means anything. I just had the hard drive replaced in February so I hope it's not that. just wanted to clarify that when I restart, I get the chime but the screen stays black- I don't get to the grey screen. So I'm assuming right now that my display may be shot?
Info:
iMac (20-inch Mid 2007), Mac OS X (10.5.8)
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Jun 4, 2012
About half a year ago I got a Macbook Air, and a Thuderbolt monitor. Then I installed Windows 7 64-bit on it. Everything worked fine until recently the Thunderbolt monitor started to go black during Windows startup without any particular reason. Using OS/X the monitor works fine. I already scanned for malware and viruses but cannot fine any. Windows restore refuses to work? I also tried several different boot options, installed latest drivers, reinstalled bootcamp drivers but no luck so far. Â
Info:
MacBook Air, Windows7, bootcamp dual boot
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Apr 30, 2007
My iBook will not display anything on its screen. Rather, it just remains black. One time, the screen did come on, but then shortly after booting, it flickered a lot and then went black again. A year ago, something similiar happened and when I took it to be serviced (when I had AppleCare), they had to send it away and have a new logic board installed. Now this machine is out of warrenty and and I am not sure what to do, or even if it is the same problem. Any suggestions?? Thanks!
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Apr 3, 2009
I have set up a second monitor to my imac using a dvi to vga cable. Now I would like to watch videos in itunes full screen on the second monitor but whenever I select them to play in full screen it makes my iMac screen go completely black.
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Mar 21, 2012
Do not want a nuisance to escalate into a serious problem thru benign neglect. Random black screen -- Turn monitor off then on, and all comes back fine. No loss of power in machine, no fan quirks, no overheating. Is it the Monitor? or the graphics card?
Info:
PowerMac, Mac OS X (10.5.8), 6GB DDR2 SDRAM
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May 11, 2012
I have a early 2011 MacBook Pro 13" running the latest version of Lion. I have been using my MacBook with an external monitor since I brought it in 2011 and have had no problems with connecting it to my external monitor. Connected via mini display port DVI adapter and a DVI cable to a Philips monitor.
Two days ago when I plugged the MacBook back in to the monitor I connected and but now only displays a black screen, I can move the mouse off the MacBook screen and over to the external monitor and back but it is not displayed on the monitor. I have tried connecting other devices to the monitor and they work fine.
Info:
MacBook Pro (13-inch Early 2011), Mac OS X (10.7.4)
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Oct 28, 2009
I've got an imac with a dead monitor and when i plug in an external monitor to get a display it only shows me the far corner of the desktop and I cannot access the dock or anything else to change settings. I need to change the monitor setting to MIRROR MODE which I believe is located in System Preferences but I cannot see anything with the current limited display.
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May 7, 2010
Well my unibody macbook display decided to screw up last night, it was working fine last night no problem. Connected to a external monitor. I fell asleep last night with front row left on, obviously it went to sleep and then I woke up and the screen was black. Now the LED lights are working, my external display is also working. The display settings recognize a screen being present (when I click detect displays and gather windows - 2 windows appear). Ive reset PRAM, SMC, reseated the RAM, control+shift+eject (which just made the screen flicker a little after turning it back on) and Im out of ideas. Its out of warranty and about about 18months old.
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Oct 21, 2008
My father owns one of the original G5s, so its power pc not intel. Today while browsing an excel spreadsheet he says part of the screen turned black, then the monitor shut off, then the monitor came back on but not video. Mean while the fans started spinning out of control. Now when he tries to turn it on, he gets power, but all that happens is the fans spinning faster and faster and faster until he turns it off. No video or anything. Just speeding fans. He fears the CPUs died since they control the fans. Any suggestions? He also says the fans were spinning unusually fast these last few days.
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Oct 11, 2010
I have a 30" Dell 3007WFP-HC monitor which I would like to connect to my laptops... I bought a HDMI to DVI cable to connect them.
When using my first laptop: Acer Aspire 6920G with 32-bit Windows 7 Ultimate, it works just fine.
But when trying my second one: Alienware with 64-bit Windows 7 Home Premium (processor Intel Core 2 Duo CPU @ 2.93 GHz), it doesn't work at all...
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Aug 13, 2009
I am still waiting on delivery of my 13'' MBP, comming from China , and I am thinking about secondary monitors and I do have a 17'' LCD monitor that I could use but i also have a 42'' Plasma TV that would be awsome, I think. Has/does anyone use there HDTV's as their secondary monitor?
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