MacBook Pro :: It Won't Detect VGA Display
Mar 13, 2012
My MacBook Pro (15-inch i7 Early 2011) won't detect an external display using an apple mini displayport -> VGA connector using 10.7.3.All cables and the monitor are fine because my white macbook detects the LG monitor without any problem.I have read and tried every 'sollution' suggested on the internet, but all fail. Since my MBPro can't even detect my Sony LCD TV (my white macbook does) i suspect it's a firmware/hardware issue.I want to buy a thunderbolt display, but am not sure if i can spend all this money when even this simple VGA connection won't work. Â
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Apr 24, 2012
I have a 2011 MBP (thunderbolt) that I've had for about a year now. I use it daily at work, with an external LCD monitor connected with a mini-dvi -> DVI, no problem, except for the occasional need to restart when first connected.
However, at home I have an AOC Razor 24" monitor that until recently was connected to my home PC via HDMI, working just fine. However, my PC died and now I would very much like to be able to use this monitor at home until such a time when I get around to finding a desktop replacement. My MacBook Pro, however, has completely different ideas it seems... It completely refuses to recognise the monitor. I don't get the blue "flash" and it doesn't show up int eh display panel at all, not "sleeping" or otherwise, it simply looks as if it's not there.
Having trawled the forums, I've done the Jan/Feb firmware update, I've tried two different HDMI converters (One the Moshi from my local Apple retailer, the other a no-name brand converter, which works fine elsewhere), I've even tried a mini-dvi -> DVI -> HDMI converter (I know, I didn't expect it to work, but when you're at then end of your wits, you're at the end of your wits ). I've gone through three HDMI cables and tried an assortment of "black magic" solutions found on the net, with the adapter half-way plugged in, resetting the PROM, closing/opening the lid, running gfxCardStatus ( just in case it did something ) and checking the monitor elsewhere.
The only thing I haven't done (that I can think of) is swap the actual MBP,however, as mentioned, I use an external DVI monitor every day, so it doesn't seem likely that that's where the problem is... I'm guessing it's got to do with how the monitor handles HDMI or some such thing but I don't seem to be able to find much of a comment from anyone else on the net, so here I am... I considered sacrificing a goat at full moon, but I'm not entirely convinced that'll do much either and I upgraded to Lion as I saw a throwaway comment somewhere from someone, indicating that that might or might not have helped them with a slightly similar problem... So this problem now spans 10.6 AND 10.7...Â
Info:
MacBook Pro, Mac OS X (10.7.3)
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Dec 15, 2009
I have a macbook with leopard osx and use it frequently for presentations and so on. I have connected it to several monitors and projectors a hundred times and it has worked fine since last night.
Last night, I have connected my mac to a monitor with vga cable but it did not detect it and instead a constantly flickering blue screen came up and never went. I am sure the cables are fine.
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Aug 25, 2014
I have a Macbook Pro mid 2009 running Mavericks. I have an old 23" Cinema Display that uses a big chunky adaptor (ADC?) with a dual USB and Thunderbolt cable and it works well with it, however, I just bought a new Thunderbolt 27" display and it just won't detect it. I also notice that a lacie drive in the same Thunderbolt slot won't show up either. The old Cinema Display does still work however using that same slot so it's not actually dead. Puzzled! Â
I know this MBP is probably one of the first generation to have Thunderbolt but I've never used it for anything other than the old Cinema Display adaptor.Â
Info:
MacBook Pro, OS X Mavericks (10.9.4)
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Sep 8, 2014
I bought a MBA 13" last month and now I'm trying to connect an external monitor through a Mini Display Port-to-HDMI adapter and most of the times the display shows a message "No signal detected"...
I've tried all the possible combinations between the MAC and the Monitor but it would seem a random matter.
Info:
MacBook Air (13-inch Mid 2012), Mavericks 10.9.4
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May 6, 2006
a hotkey to detect new displays? I plug my Powerbook into my TV often and don't want the little Detect Display icon in my menu bar. It would be much easier just to use a hotkey, or even if I could set up a shortcut to do it.
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Aug 29, 2009
I use two monitors: an Apple Cinema display and a Dell, which is display number 2. I installed SL and it was normal until I rebooted the first time. Now every time I boot up, the only display that is found is the Dell and I have to go into preferences and select "detect displays" to make the main one show up. It loads as if the Dell is the only display, and since it is smaller it messes up my desktop, lumping all my icons on top of each other. When I click "detect displays," it moves everything back to the Apple monitor, making it the main display as it should be, but it is all out of whack.
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Feb 4, 2012
I'm using a mini display-port to hdmi lead and it worked once. I unplugged the hdmi cable when it was still connected to the mac and now it wont find it.
Info:
iMac (27-inch Mid 2011), Mac OS X (10.7.3)
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Aug 23, 2009
a mini display port. I purchased the mini display port to DVI adapter to hook my computer up to a Viewsonic vx2235wm 22" screen. I plug it in and get nothing. I've read on the apple support site that some people with older mac mini's and MacBook Pro's can hook it up no problem. But for me, my monitor is getting no signal and my MacBook Pro doesn't detect the monitor in the Display Preferences.
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Oct 13, 2009
I just got a new mac pro dual quad core to replace my single dual core for work. Im trying to pull my Nividi Quadro 4500 out of my old machine that i had installed by apple in to my new machine. i get it all hoked in right but when i turn on my new machine it dosnt detect the display. Any suggestions?
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Mar 22, 2012
watch Tv on my New Imac 21.5 (2012) with thunderbolt port.My set top box has HDMi out. I need to connect HDMI ( from Cable Box) to thunderbolt ( On Imac)I have learned that this can be done by single coverter cable = HDMI to Mini display cable (Thunderbolt port will accept Mini diplay Input, they say)Â will it work > how about the audio?Â
Info:
iMac, Mac OS X (10.6.7)
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Dec 20, 2008
New MacBook rocks and in cables to hook it up to my Sanyo HDTV 1080p. I plug in the HDMI cable and the picture comes on.
However, every once in awhile the screen goes black and it says "Signal Not Found." Also, every time I turn on the MacBook I have to unplug the HDMI cable, wait a few seconds, and then plug it back in before it will detect the external display.
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Aug 6, 2010
I have a 27" imac and have been using an apple led cinema display with it. I have had no problems with the display until today. Yesterday I installed windows 7 via bootcamp and had some trouble with the second display being detected but after downloading all of the bootcamp updates it worked fine. Today I restart my computer back into OSX and the display does not work. I tried resetting the PRam or whatever but that didnt do anything. When I go to system preferences > display there is no longer an option to detect display and there are no longer options to change the screen resolution.
I spoke with an apple tech who has me installing an update but I dont think she really knew what was going on and I doubt this will work. When I reboot back into the windows partition the display works during start up and I see the windows logo. So I dont think its a hardware issue (also the display still works fine with my macbook pro). But as soon as startup finishes I get a black screen. Under the control panel windows still recognizes that there is a 2nd display attached and you can still drag items over to the other screen, I just cant see anything. All black.
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May 30, 2009
I was surfing the web, and suddenly the wheel started spinning and my MacBook locked up. I tried rebooting, only to see a folder with a question mark on it. So I tried to boot from the DVD and use Disk Utility to repair my HDD. But Disk Utility didn�t detect my hdd. So I assumed that the drive was dead and bought another one and istalled it.
The new hdd was not recongized by my machine either. Then I took the old hdd and installed it in a external case which connects to the computer with USB and I managed to boot OS X from it.
Anyone knows how I can make my MacBook detect my internal SATA drive?
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Apr 28, 2012
My MacBook Pro won't detect my SanDisk USB, I recently had the same problem with a card reader. Initially, I thought it might just be the card reader but now I'm thinking it is an issue with my MacBook.
Info:MacBookPro
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Sep 9, 2014
my macbook pro can't seem to detect ANY usb drive. I have already selected to "show external disk/drive" on finder's preferences but it doesn't work.
Info:
MacBook Pro with Retina display
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Jan 3, 2011
I have a macbook pro (penryn) that just stopped working. I believe the hard drive just died on me because whenever I try to boot up, I just hear this clicking sound. I think I may have a bootable backup I made with SuperDuper! a while back on my external hard drive. I tried connecting it to my MBP but it wouldn't detect the drive. I only get the mouse cursor when I hold down the option key at boot.
Does anyone know if this may be a known defect? Do you think Apple will replace the hard drive for me?
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Jun 18, 2009
I have a Macbook and I just bought an iPhone 3G and it seems my mac is totally not responding to my iPhone.I have the latest updates but to no avail.I also have also just loaded intego virusbarrier 5. I heard that it is interfering with the sync of both devices. So how do resolve this problem without having to erase and re-install my harddisk
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Dec 6, 2009
I have been moving over the week and when i was setting up, i accidentally plugged the wrong ac adapter into my usb hub.
the next thing i notice, the usb is no longer working. keyboard, mouse, etc, not working, the other ones are
initially, the wifi card went out to with the other usbs. i did two reboots and the wifi and other usb ports came back.
the one where i plugged in the usb from the hub is dead
is there an easy fix for this? im pretty sure there isnt but i had to ask. how much will apple care charge to replace the usb?
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Feb 10, 2012
Macbook cannot detect keyboard when starting.
Info:
MacBook, Mac OS X (10.7.3)
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Feb 29, 2012
I passworded my external hard drive using disk utility. the system does not detect the drive after i did a clean install. what do i do?
Info:
MacBook Pro, Mac OS X (10.7.3)
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Mar 5, 2012
I've connect the mac book pro to my LED TV with the headphone port as my audio output. After I disconnect it, the internal speaker did not work and the mac could not detect it from the system preference.Is it because of the hardware or software problem?
Info:
Mac mini
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Apr 13, 2012
how to detect flashback virus? Then, how to remove it-if found?
Info:
MacBook Pro
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Jan 14, 2009
I have a Macbook pro (OSX 10.4.11) and all of a sudden it stopped detecting a fairly new Jump/Flash drive that up until now worked fine. The icon doesn't show up on the desktop or in the Macintosh HD window.
The flash drive has "Dane-Elec" printed on it and is 4GB. I've tried it a number of times and nothing. The drive does still work on other computers, and my usb port is working properly with other devices.
The flash drive doesn't seem to show up in System Profiler and my Disk Utility has been "gathering information" for about 5 minutes now." Everything else is working fine with the notebook.
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Oct 9, 2009
I have a 13" MBP and it won't detect my external display. It works fine on my sister's whitebook using, but won't detect at all on the MBP. I've went to "detect displays" under system preferences, played around with the cable, and made sure the monitor is on. It work's flawlessly on my sisters. What's wrong? Any suggestion on what I should do? I'm losing my mind right now. The screen on the MBP goes blue for a sec when the external display is connected, but then just goes back to it's original desktop.
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Feb 10, 2012
Also, I think I downloaded an old version of Messenger for Mac.
It probably have no sort of malware or viruses but assuming it may have, does the "sandboxing" technique by Apple prevent any malware from interfering with my mac. And does deleting tha old version clear any malware associated with it as well?Â
Info:
MacBook Pro, Mac OS X (10.7.3)
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Apr 12, 2012
I just heard about Flashback and wonder if my computer (or possibly iPhone) is infected. My iTunes account was recently hacked and I received over $70 in charges for purchases I did not make. I was told that Flashback can and does hijack usernames and passwords. I installed and ran iAntiVirus but it didn't pick up anything. I also have an iPhone and an iPad that I access my iTunes store from quite frequently.
Info:
MacBook Pro, Mac OS X (10.7.3)
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Apr 30, 2012
im pretty sure he has created a hidden admin account to change his parental control settings. I was just wondering how would you detect a hidden admin account?
Info:
MacBook Pro, Mac OS X (10.6.6)
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Jun 17, 2014
I am using MBP 13 (Non Retina ), It doesnt detect my wifi router always, Sometimes it does, When it doesnt, my other laptop and phone can detect the same wifi.
Info:
MacBook Pro, OS X Mavericks (10.9)
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Jun 5, 2014
recently the harddisk of my macbook pro crashed and I had it replaced with a SSD thinking I could use the old harddisk as an external but now it seems like the crashed harddisk cannot be detected by my macbook. What should I do?
Info:
MacBook Pro, Mac OS X (10.7)
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