OS X :: Monitor Not Getting A Signal From My MacBook?
Jun 3, 2010
I had a monitor set up and working on my MacBook, but the monitor was crap. I disconnected it, and then re-connected it a couple of days later while I waited for my new one to arrive and found that my computer was no longer seeing my monitor. Since it was going away, I wasn't concerned and just figured I'd wait until I got the new one.
NEW MONITOR AND COMPUTER SPECS:
Dell 2209WA - Ultrasharp
MacBook approx 2.5yrs old
Model Name: MacBook
Model Identifier: MacBook4,1
Processor Name: Intel Core 2 Duo
Processor Speed: 2.4 GHz
Number Of Processors: 1
Connecting the two with a mini-DVI to DVI cable (tried a mini-DVA to VGA and that didn't work either - both the computer and the monitor didn't see each other)
PROBLEM DETAILS:
My computer thinks it is mirroring and/or spanning. In the display settings I can see both my laptop monitor and the new one and can even mess with the arrangement and turn on and off the mirroring.
My monitor however says ""there is no signal coming from your computer." and it tells me to touch keys or the mouse to wake up the mac.
I have the DVI input selected and I have tried toggling through the different input modes and still nothing.
ATTEMPTS AT FIXING:
I have restarted
Reset the PRAM at start up
unplugged and re-plugged in everything
put computer to sleep, woken back up
restarted with the monitor connected and WITHOUT it connected....
NOTHING is working.
I don't know what the problem can be and what I can do to fix it.... Any thoughts or fixes?
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Dec 10, 2014
I'm using an Envision 17" LCD with a Mac Book Pro, also have an Apple DVI-VGA converter in the mix. I know this monitor works fine with this computer but suddenly, I'm getting no signal.
Power cycling the monitor doesn't work; unplugging/replugging the video cable doesn't work.Â
Rebooting works, but if I try to change the resolution, the monitor stops getting signal. I know the computer "knows" the correct rez, but doesn't always offer it. I suspect a corrupt software component...Â
This monitor/cable works just fine with my 2009 MProÂ
Info:
MacBook Pro, OS X Yosemite (10.10), 13", 8GB RAM
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As said, my current set up is an HDMI - DVI cable (HDMI to monitor and DVI to adapter) and my DVI - mini DisplayPort adapter, everything is connected fine but when I turn on the monitor, it says cable not found... and nothing is displayed on the screen but on the Macbook side of things, it sees the monitor is connected (I can extend the screen and leave the screen) but other than that, it appears I cannot get an image on the monitor, pressing every button on the monitor does not work either.
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Proc. 2 GHz Intel Core 2 Duo
Graphics Intel GMA X3100 144 MB
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MacBook, Mac OS X (10.7.5)
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