My mac is on, but the screen stays black. Help
Ok. So when I used my mac this morning, it was working fine. I turned it of, then came back to it after lunch. I turned on the mac, i heard the drive start up, and the click you hear when it turns on. The mac was on but the screen stayed black. I shined a flashlight on the monitor, but there was no faint image, and I can't remove the battery because the bottom is a single panel held in place by 10 screws. I really need help, because I use it for homework.
Connect to an external monitor. If it's black you have a GPU/VGC or logic board problem (since GPUs on MacBook computers are integral to the logic board the only way to fix it would be a logic board replacement).
If you see a normal image you should be able to complete your homework. And your problem is with the internal video display chain. This could be a cable, controller/inve
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There's another possibility for a dark screen, but only for the non-Unibody models with removable main batteries (2006-2008, Models A1150/A1211/A12
- on powerup, the computer will make the normal startup sound, but the screen doesn't light up
- the clock will be way off, resetting to a time like Jan 1, 1970
Since the default Date & Time setting for later generations of OSX is to synchronize time automatically from an Internet-based network time server, it's possible to have a weak PRAM battery for a long time without detecting it. If you have suspicions. you can switch your Date & Time system preference to manual, then shut down the computer and cold-start it, to see if the clock loses the manual setting.
If it's a PRAM problem, the dark-screen problem is a result of the failure of the computer to send a sync signal to the display at startup. Sometimes you can get the display to light up by starting up with the dark display, then doing a force-restart (Command-Control-Power). The computer may retain enough of a charge from the first startup to supply a sync signal for the restart.
If this is the problem, and you have a non-Unibody model that has a replaceable PRAM battery, you can get the parts and the replacement guides here. In Unibody/Retina models, PRAM power is drawn from the main battery, which remains in the computer at all times.