How can I restore signal from my Mac Pro to my Viewsonic monitor, connected by VGA?

I have a Pro Mac OSX version 10.7.5 running. Trendy top is a monitor 24 inch Viewsonic, the only monitor connected. Last week, everything was fine. I stopped him all night and the next morning, when I tried to start, there was no signal from the Mac to the screen.

The screen displays a 'No Signal' message.

I checked the entry on the monitor, and it is correctly set to PC.

The computer starts normally. I can hear him do his thing.

The monitor starts up normally. No flashing or spots.

I tried restart, disconnect the monitor from the computer, just stop and unplug it, then reconnected. I tried to plug the old monitor (using VGA connection) and start again, with the same result.

I tried to recall the NVRAM (found the instructions on this site) and it made no difference.

It would be appropriate to get a HDMI cable to connect the?

It seems to me that if the computer does not recognize the monitor, try another cable wouldn't make any difference, but I'm really an 'end user' at this stage and would appreciate any advice.

Thank you!

Try resetting the SMC

Reset the management system (SCM) controller on your Mac - Apple Support

The VGA input and cable works with another computer/device?

The port of exit on the Mac works with another monitor?

What model Mac pro?

What video card is installed in the Mac?

What output port are you helping?

Maybe the video card has failed. If yo have an old Mac Pro with an original which is likely to card

Tags: Mac

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