My mac pro monitor wont turn on

Any tech expert knows these tips are as effective as they are ubiquitous. You should know you cannot check this stuff with your eyes alone. Remove the cable, then reinsert it carefully and properly. If you know that your graphics chip requires a driver like many after-market Nvidia cards , make sure you have it installed for full support. Those are the kinds of details that mess people up, so double-check all your assumptions.

Frustratingly, the most popular display connectors have multiple different versions, all of which look the same from the outside.

Hard Drive

You need to make sure that you have the correct display connector for your Mac and your display, with the correct version. Only the newest cables can support the newest features. They include processors all their own to power their newest tech. If your monitor turns on and gets a signal, but the display is low-quality, the display version is a good thing to check. HDMI is on revision 2.

My MacBook Pro turns on, but has a black screen.

USB-C is the worst: the cables can look identical but have completely different capabilities. DisplayPort 1. Also, you should avoid chaining video adapters together.

How To Fix: MacBook Pro Won't Turn On (Power On)

Apple notes that doing this with one or multiple external displays can cause problems. Select the highest available option, typically at the bottom of the scrolling list.

First, look for any graphics adapter or monitor drivers that might be required. Higher-end monitors can be surprisingly complex, and while few displays require drivers, a graphics chip often will. Display resolution and refresh rate can also be limited thanks to display connectors. VGA, for example, can only support a maximum display size of x Fit this by switching to a different connection standard.

The more-common HDMI 1. You can check these standards before buying a monitor. Your Mac hardware also plays a part. The higher-end devices with discrete GPU chips can drive the most pixels, while something like a MacBook would be far less capable, even though they could theoretically connect to the same display with the same cable. If one monitor displays significantly different colors than the other, you can use color calibration tools to fix the problem.


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Follow the instructions to create a new calibration from your display. On your keyboard, locate these keys: P , R , Option and Command. Press and hold the four keys: P , R , Option and Command as soon as you hear the startup chime sound on the Mac, and hold until the sound plays a second time, then release all four simultaneously.

SOLVED: MacBook screen won't turn on - MacBook Pro 15" Core 2 Duo Models A and A - iFixit

Note: you can tell the NVRAM reset is successful by the different volume level of the second startup chime. If external video appears, check the system for any pending software or firmware updates and update accordingly. Verify that the LVDS cable connection is properly seated to its connector on the logic board and that the cables are not damaged. Remove the display housing and check that the flex connection is properly inserted, aligned and seated in its connector on the panel.

Basics first

Misalignment can cause multiple video issues. During insertion, the connector should be perfectly straight, not at an angle, and the connector should slide into its mate in a flat position, parallel to the LCD panel, not obliquely. Step 7. Now here comes the important part. Are you capable of measuring the backlight fuse as well as the WLED driver to see if those function.

Check for power-related issues

Those are the parts that are responsible in part for the backlight. Hope this helps, good luck. John Laney jjolaney. I loved the one that I had like this, in my humble opinion, I think that either a cable is loose or unconnected. The other thing that could have happened is that the back light could have burnt out.

Help Translate iFixit. Back Answers Index. Cory Rep: 1. The computer is powering up but the screen will not light up, I messed with the computer a few months ago and as long as it stayed on, didn't sleep or die it was functional All help is appreciated.

What Is Wrong with a Mac Desktop if It Won't Turn On?

View the answer I have this problem too Subscribed to new answers. Is this a good question? Yes No. Voted Undo. Score 0.