Mac Laptop has black screen

Your question is not very clear.
ReBoot restarts the Mac which shuts the power off momentarily.
So... Black screen = power off

Sounds like your screen went bad.
Close the lid, attach an external monitor, open lid and see if the screen appears on the monitor.

Resetting the PRAM may do the trick also:
You reset the PRAM by rebooting a Mac and then immediately hold down the Command+Option+P+R keys, you will then hear the Mac reboot sound again, signifying your PRAM has been reset. You must hit the key combination before the grey screen appears otherwise it won't work.

Happy New Year,
Kerry

Sounds like your screen went bad.
Close the lid, attach an external monitor, open lid and see if the screen appears on the monitor.

Resetting the PRAM may do the trick also:
You reset the PRAM by rebooting a Mac and then immediately hold down the Command+Option+P+R keys, you will then hear the Mac reboot sound again, signifying your PRAM has been reset. You must hit the key combination before the grey screen appears otherwise it won't work.

Happy New Year,
Kerry

Thanks for contacting FixYa Support, I will be glad to assist.

Here are some 3 sets of troubleshooting steps you can try in order to work and resolve this issue:
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Procedure #1

Here are some steps you can try to resolve the issue:
• First, hold in your power button for approximately 10 seconds to do a hard shutdown.

• Once your Mac is shutdown, you will need to perform what is called a PRAM reset (Parameter RAM)
This should help with the freezing issue:

• Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously .

• Turn on the computer.
• Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.

• Now, hold the keys down until the computer restarts and you hear the startup sound for the third time.

• Release the keys and allow the Mac to start up.

If this does not work go to Procedure# 2

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Procedure # 2

Perform an SMC Reset (Have to provide you the link from Apple for this procedure, due to not having enough space to type this our for you.
Macbook SMC Reset Processes

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Procedure# 3
One final step I would recommend you try regardless, is to repair the folder and file permissions on your Macbook, which, do get damaged sometimes and can hinder the optimum performance of your Macbook using Mac OS X 10.5 Leopard or 10.6 Snow Leopard. This will require

font.f1 {font: 13.0px 'Myriad Pro'} -RUN DISK UTILITY WITH STARTUP DISK-

1. Insert your Mac OS X Startup disk
2. •Reboot your Mac
3. •At the Apple Chime, press the C key and hold it until you see a White screen, gray Apple and eventually a Spinning gear.
4. • Release the C key only after you see the Spinning gear.
5. •Mac will boot from the startup disk to the Installer environment
6. • From the Installer Menu bar, click Utilities > Disk Utility and open up Disk Utility application.
7. • Click on on the hard drive at the top of the window in the left sidebar and
8. • Select "Repair Disk"
9. **Let Disk Utilities run this repair the disk until completion
10. • At the end of this process, reboot your Macbook

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These are all helpful procedures used by many Apple techs and Mac users to help resolve system and application interrupts, as you have described.

I hope this will help resolve your issue so you can resume using your Macbook. Let me know if I can be of further assistance.
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Regards,

Mactechtrainer

This folder means your Mac can't find a "Startup Disk'. Try holding down the "option" key at startup.
If you see a drive, select it and click the arrow.
If you have an iBook or Powerbook try holding down the "X" key at startup.
If neither of these options work you may need to repair the disk. To do this do the following.
Turn on your mac, immediately after the tone press and hold the command + S keys until the computer shows a black screen with white text.

Once this is finished loading you'll be at a "command line"

Type the following exactly as shown, including spaces.

/sbin/fsck -fy

Now press the return key.

If any repairs were made, repeat entering the command and press return.

Do this until no repairs are made.

Now type the following exactly as shown.

reboot

And press return.

If your computer reboots and makes it to the login screen then congratulations. If not you can try this as well.

Start up your mac and BEFORE the grey screen appears press and hold the following keys at the same time.

command + option + p + r

hold these keys down until the computer restarts and you hear the startup sound for the second time, then let go of the keys.

Other than that you may need to take it to someone to be repaired. hope this helps.

Three immediate possibilities in order of expense:
1) Make sure the brightness is on. Press the F2 key.
2) Screen backlight could be blown out, especially if you can hear the disk seeking, fans, etc. even though the screen is black. Connect your Mac to an external display or TV using the appropriate adapters. If you get an image, you need a new backlight or LCD panel.
3) Entire machine is plotz, especially if you hear absolutely no chimes, disk movement, optical reset, fans, etc. This may indicate a power board or logic board issue.

try to plug in a extrernal monitor and see if that works if it does your backlight went out

If you need further help, reach me via phone at https://www.6ya.com/expert/david_eb7ea98642566cc6

Try to remove the battery and unplug the power supply, then hold down the power button for about 10 seconds. If this doesn't work, it could be that the laptop overheated while watching the DVD.

Try connecting it to an external monitor.
When you do, as soon as you press the power button to turn on the laptop, close the laptop lid - as this forces the laptop to display on an external monitor.
If this works, then it means the laptop screen is bad.
If it doesn't, the most likely cause would be that the laptop video card went bad.
For a while, some older Dell laptops with high-end nVidia graphics cards tended to die suddenly.

Hi, is possible that on having hibernated your equipment has blocked himself, tries removing the external battery and it connecting only to the AC Adapter, try turn on, as soon as the equipment completes the load of the operating system, turn off and place again the external battery, must work