External monitor doesnt work

I was able to plug an external monitor into my T61 and have it work until I installed the latest Windows service pack. I am running XP in this laptop. I dont have a clue as to how to check settings for the external monitor port but I think something must be shut off.

I actually just solved the problem by downloading all the driver updates for my computer so no help needed on this.

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Ejecting external discs doesnt work properly, no spin down of disc. why?

ejecting my external discs doesnt work properly anymore in 10.6, no spin down of disc happens, the finder unmounts the disc(s) and then the disc spins on and on. thats weird, because, in 10.5 i ejected discs and then they went spinning down the drive, as it has to be.
when i unplug the disc, which is unmounted from desktop, and still spinning, it makes a terrible noise in the disc. like a high pitched short tone.
any idea whats going wrong here?
thanks!

you probably mean "causing the fail to spindown"
you maybe mean software like techtoolpro5 or drive genius3?
yes i disabled these helper apps on the discs, but first i used it (like monitoring
all discs if they are nearly full, or working s.m.a.r.t and so on. yes its useful,
but obviously it causes problems. i must mention, that i tested my 4 external drives again,
and i found out that i can eject all discs, like said before, but only 2 of the discs are spinning down, after ejecting, BUT only when i use the button "eject" in harddisctoolkit, they dont spin down, when ejecting from desktop (apple+E), and the other 2 of the 4 drives refuse to spin down, after ejecting, even with pressing eject in harddisctoolkit....
i can also state, that these 2 discs, which refuse to spin down, are FW800/400 discs and connected via FW800. and the 2 discs which spin down succesfully are UBS2 discs, if thats worth mentioning...
Message was edited by: purepeter

External monitor stopped working after 10.6.7 update

I have a MacBook Pro, model identifier MacBookPro6,2 with an NVIDIA GeForce GT 330M.
When I updated last night from 10.6.6 to 10.6.7 I stopped being able to use my Dell S2409W external monitor.
I have tried resetting the pram, resetting the SMC, booting with extensions off.
When I plug in the cable to the external monitor the Mac screen goes blue for about 0.5 second and re-appears but nothing displays on the external monitor; a second monitor is not listed in the Display preferences and the monitor reports that it is not receiving a signal.
I don't see anything in the system.log when I plug or unplug the monitor cable (I'm not sure if I should).
At random intervals while the external monitor cable is plugged in the screen goes blue for a half second and then re-appears.
The screen does not go blue if I wiggle or flex the monitor cable.

I see this in the windowserver.log after reboot, login with shift-key, and the external monitor connected.
There might be a clue here but I don't have anything to compare it to since I haven't collected these data when the external monitor was working.
I'd be curious to see the same data from the windowserver.log for somebody else with a MacBook Pro with an external monitor connected that does work.
You can view this log with the console application located: /Applications/Utilities/console.
If you are willing to share these data please reboot, and hold the shift-key down when logging in to disable extensions (thanks). If you look at the time just when the desktop appears when you end up looking at the windowserver.log you'll be able to see the windowserver starting up about 10 seconds prior to this time.
Mar 22 21:31:26 [110] Server is starting up
Mar 22 21:31:27 [110] CGXMappedDisplayStart: Display0 : boot screen
Mar 22 21:31:27 [110] CGXMappedDisplayStart: Display0 : display alias 0x0 valid
Mar 22 21:31:27 [110] CGXMappedDisplayStart: Display1 : no display alias property
Mar 22 21:31:27 [110] CGXMappedDisplayStart: Display2 : display alias 0x0 valid
Mar 22 21:31:27 [110] MPFinalizeInitialization: Display 0x3f003e unit 2 alias mask 0x5
Mar 22 21:31:27 [110] MPFinalizeInitialization: Display 0x4272dc0 unit 0 alias mask 0x5
Mar 22 21:31:27 [110] GLCompositor: GL renderer id 0x01022612, GL mask 0x00000003, accelerator 0x00003137, unit 0, caps 0x00000003, vram 512 MB
Mar 22 21:31:27 [110] GLCompositor: GL renderer id 0x01022612, GL mask 0x00000003, texture units 8, texture max 8192, viewport max {8192, 8192} extensions 0x0000000f
Mar 22 21:31:27 [110] GLCompositor: GL renderer id 0x01024300, GL mask 0x00000004, accelerator 0x00003c0b, unit 2, caps 0x00000003, vram 288 MB
Mar 22 21:31:27 [110] GLCompositor: GL renderer id 0x01024300, GL mask 0x00000004, texture units 8, texture max 8192, viewport max {8192, 8192} extensions 0x0000000f
Mar 22 21:31:27 [110] agc_attach: gMux mode is dynamic
Mar 22 21:31:28 [110] CGXPerformInitialDisplayConfiguration
Mar 22 21:31:28 [110] Display 0x4272dc0: MappedDisplay Unit 0; Vendor 0x610 Model 0x9cb7 S/N 0; online enabled built-in (0,0)[1680 x 1050], Rotation 0, base addr 0x102a00000
Mar 22 21:31:28 [110] Display 0x4272dc2: MappedDisplay Unit 2; Vendor 0x610 Model 0x9cb7 S/N 0; offline enabled built-in (2704,0)[1 x 1], Rotation 0, base addr 0x113800000
Mar 22 21:31:28 [110] Display 0x3f003d: MappedDisplay Unit 1; Vendor 0xffffffff Model 0xffffffff S/N -1; offline enabled (2705,0)[1 x 1], Rotation 0, base addr 0x102a00000
Mar 22 21:31:28 [110] Display 0x4272dc0: MappedDisplay Unit 0; ColorProfile "Color LCD" (MD5 a23cb9c96f2fd096b7a058db0d319259)
Mar 22 21:31:28 [110] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x2 not owned by caller (PID 202)
Mar 22 21:31:35 [110] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x2 not owned by caller (PID 206)

External monitor only works with clam shell open

external monitor only works with clam shell open

Are you using the method in this Apple article? If you do, it should work.
Mac notebooks: How to use your computer in closed clamshell (display closed) mode with an external display

External monitor not working - software upgrade

Use an external LG monitor with my Macbook at work - has worked like a charm. There was an Apple software upgrade this weekend - today, when I came back to work, I can't get my external monitor to work. The Mac doesn't see that it's there and the monitor's stuck in Power Save Mode.
Thoughts?

I have reset the PRAM and confirmed that the monitor and cable are functioning properly, but still no change.

T420s - swapping to extended monitor doesnt work

connecting my laptop to a tv or any other external monitor does work but when i try to swap to extended monitor or any other setting my pc shuts down and reboots.
any ideas ??
thank you in advance

Hi
For resolving the mentioned issue , Please try the following
1. Update the Bios to latest version
http://support.lenovo.com/en_US/downloads/detail.page?DocID=DS014992
2. Update the Display Video drivers
http://support.lenovo.com/en_US/research/hints-or-tips/detail.page?&DocID=HT063249
After updating drivers press Fn + F7 to toggle from internal to External Monitor
I hope this helps

IMac external monitor not working after lion upgrade

Hi,
I have had an external monitor hooked up to my 09' imac for over a year now. I upgraded to Lion and ever since then it hasnt worked but one other random time when I moved and hooked everything back up. Im very tech savy, but this just doesnt make sense. Have combed google to find a solution. I have a Samsung 22in moniter and all the blue power button does is blinks at me. I am using a miniDisplay to DVI connection.
Does anyone have any suggestions other than resetting the ram?

I guess it's possible you've got some kind of hardware problem.... but not likley given it started with you installed your OS.
Here's a few things to try:
1. see if you can borrow another monitor just to be sure your monitor isn't the problem.
2. in System Prefs, and the Displays pane, click on the Detect Displays, then then the Gather Displays. If you get two diffenet display panes, that would lead me to think it's a monitor problem.
3. Lastly, disconnect your 2nd display, and restart. Then Shutdown, reconnect it, and see if that helps.
and of course..
4. make sure that all of your connections and adaptors are tight.

Can't get external monitor to work

I've used a Mac laptop for the last 8 years, finally decided to get an external monitor for home use.
I purchased a 25" Hanns-G HZ251. It's not working as I would expect it to work. I've got a standard DVI connection on my older MacBook Pro so I'm connecting via a DVI to DVI cable.
The only way I can get the monitor to display what is actually on my laptop is to have my laptop open and mirroring turned on. I thought I could have my laptop shut and the monitor would still work when connected, but when I shut my laptop it just goes black.
If I leave my laptop open but turn mirroring off, I get the generic purple Mac desktop, not my desktop.
What am I doing wrong?
There's an install CD that comes with it, but that only runs on a Windows machine. I appreciate any advice, I'm fairly technically handy but this is my first foray into using external monitors, so I'm definitely struggling to figure this out. Thanks.

conejo61 wrote:
Yes, it's connected to the power adaptor and I have an external trackball and keyboard.
You will have to keep them both open and play around with monitor settings until you get them both working. Keep doing "Gather windows" in System Preferences to get the display preferences window for the 2nd monitor and change it each time it doesn't display anything.
I don't know what it means "you will have to set it".
You have to set the desktop for the additional screen. Once you get closed clamshell to work, the external monitor will be your primary screen and you won't have to worry about it.

External Monitor Not Working With Macbook Pro

My computer was working fine with an external monitor, then my computer froze, and I had to hold down the power button. When I turned it back on, my computer would not work with an external monitor. I've tried different cables, so it's not the cable. The monitor is being detected by the computer, but nothing is showen on the external monitor. When connecting the monitor to the computer, the computer's screen goes blue, then turns back to normal. I
I cannot reset the SMC by removing the battery, I do not have the confidence to remove my battery, and do not have the time to send the computer to someone else to do it.
I also tried updating my OS from 10.7.4 (Might've been 10.7.3) to 10.7.5.
My computer is a MacBook Pro (13-inch, Mid 2010), running OS X 10.7.5 Lion.
I need to get this problem fixed ASAP, any help is appreciated.
Kind Regards,
Sergee237

I forgot to mention, I'm connecting the monitor via MiniDisplay -> HDMI. I've also tried USB -> HDMI and USB -> DVI -> HDMI but none of them seem to work.

Why did my external monitor stop working

I bought a brand new iMac on Saturday. Came home. Migrated from my MBAir (mid-2011). Plugged in my Samsung 27' TV (via Moshi HDMI to Thunderbolt converter) and it worked just great. Beautiful picture on both iMac 27 AND Samsung...Until this morning. Now, external monitor doesn't work. I've done various resets (per forum posts) NOTHING else has changed...Any ideas?

By the way...My MBA doesn't work (suddenly) either!

How can I get an external monitor to work in OS 10.9.3

I installed OS 10.9.3. External Retina monitor still works fine. All other external monitors have ceased working. They were working poorly under 10.9.2, now dead. Advice other than giving up and fixing Apple issues by switching to Windows?

I was just assuming since it was 'universal' it would work. D'oh.
The "Universal" accouts for the differences in the architecture between PowerPC and Intel, but not for differences between 32 bit and 64 bit applications. And since MacOS 10.7 the operating system changed dramatically. The process system supports applications to use a sandbox for safe communication. Older code, not ready for sandboxing, cannot communicate with the new GarageBand.
GarageBand for Mac (v10.0): Unexpected behavior with Audio Units plug-ins

External monitor not working after ML upgrade

I have a late 2008 Unibody Macbook and normally use it in clamshell mode with a Samsung 2043NW monitor if I'm in the office. Previously working fine in 10.5.8 through mini display port adapter. Upgraded via fresh install of 10.6.8 to ML, and the monitor flickered on occasionally but otherwise would not work - when it did display it showed the same resolution as the macbook screen i.e. 1280 X 800 instead of 1680 X 1050.
There's a thread here related to this: https://discussions.apple.com/thread/2387462?start=15&tstart=0 but this software was not the answer. I can now view the screen, but it is still being sent a resolution of 1280X800, rather than 1680X1050 (i.e. a fuzzy mess). It also will not work in clamshell mode at all, and just goes to sleep when the case is shut.
Anyone have a solution for this, or have I been 'obsolesced'? Does anyone have a unibody Macbook that DOES work with an external monitor?

OK, now here's an interesting thing - the macbook has begun to work in clamshell mode. This is REALLY weird. Tried again this morning in the hope of getting back the monitor control icon in the toolbar and it booted straight into clamshell mode with the lid shut.
When I first had this running 10.5 it would only work in clamshell mode if you pressed the power button and immediately closed the lid before the screen lit up grey. More recently it has been perfectly happy to enter clamshell mode after a period of use normally, just plugging in the monitor and shutting the lid. It would be nice if this behaviour were to start again soon.

External monitor not working after installing latest NVIDA drivers

I have a mid-2010 MacBook Pro. I installed bootcamp and Windows 7 x64. I performed all the Windows updates then installed the Apple Bootcamp driver CD. Everything was working fine and I was able to connect an external LCD monitor using a mini display port to HDMI cable (the LCD only has HDMI ins).
I then came across a piece of Windows software that requires the latest production NVIDIA drivers so I went to the NVIDIA web site and downloaded their installer for the GT330M which is the chipset in this MacBook Pro.
The NVIDIA installers ran fine and installed version 275.33 of their drivers, however, when I hook up the external display the primary display goes black and the external monitor simply cycles through all the inputs like it can't find a signal. When I unplug the mini display adapter from the MBP the MBP screen returns to normal.
Thoughts?
TIA,
-Noah
PS. Windows 7 *****. Took over 3 hours to install and apply all the Windows updates with countless reboots. Lion took under 20 minutes to fresh install.

Well low and behold I tried clearing PRAM again and I reset my monitor to factory defaults. Reconnected my monitor and the thing works now. Very strange but I'm Happy that it's working again. *WHEW*

External Monitor Not Working after 10.9.3

I have two Macs which are not working with an external monitor anymore through the thunerbolt port. I have tried different types of connections (HDMI and DVI) and two different external monitors in an attempt to determine the issue. The only common denominator to the issue is the update to 10.9.3 OS X. I have also reset PRAM and changed between mirroring and non mirroring to no avail.
Mac #1:
MacBook Pro8,1
Intel Core i5
2.4ghz
Intel HD Graphics 3000 512MG
External Monitor: Resolution 1920X1080 @60hz
32 Bit Color (ARGB8888)
Main Display: Yes
Mirror: Off
Online: Yes
Rotatino: Supported
Mac#2:
MacBookAir6,2
Intel Core i5
1.3ghz
Intel HD Graphics 5000
External Monitor: No information as it's not connected at this time.

Well low and behold I tried clearing PRAM again and I reset my monitor to factory defaults. Reconnected my monitor and the thing works now. Very strange but I'm Happy that it's working again. *WHEW*

Can't seem to get DVI and external monitors to work (works on windows) ?

I'm going crazy here and I'm starting to think something is broken/wrong with the mbp I just purchased (I'm hoping it's just me and not the mbp)...
I have a BenQ FP91G+ LCD monitor that works fine using dvi with my windowsXP machine. When I try to get this monitor to work using DVI with my mbp all I can get is a black screen. The mbp sees the monitor fine since I can see it in the display settings. I've tried every different resolution available in the display options (with mirroring off and then again with mirroring on). No luck with dvi. However, if I use the vga cable with the dvi adapter things are fine.
I then tried two other lcd external monitors with the dvi input (one a Princeton model here at home, and a different model that I tried in a Best Buy - I think it was a sycmaster). The Princeton at home had the same BenQ problem - just a black screen no matter what I tried. The one in best buy, however, got a 'bit' further when I set its resolution to 800x600 - but even then it was bad since the display was just scrolling vertically.
I'm a bit stumped what is going on. I really should be able have this digital output work since all three of these monitors work fine with the dvi cable on windows.
Is there something seriously wrong with my mbp? What else should I try? Thanks for any help. (I've been searching these forums but haven't found anything yet to help.)

Thanks iVmichael, that makes me feel a little better at least. I'm guessing maybe the issues I'm having might be driver related? Seems odd that all 3 monitors I would have a problem with, but I guess it's possible. I can deal with the dvi-vga adapter usage, just don't want to something to be wrong with the hardware on the mbp.

External monitor doesnt work

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