I have a 2009 MacBook Pro 13".
After I haven't used it for a while, I wanted to start it up again to give it to my sister and something really odd happened.
I have searched both google and AskDifferent intensively. There is a lot of questions and forum posts, that are similar, but none are quite like my problem.
- When I turn it on, the screen stays black. No boot screen, no Apple, nothing. However the backlight is on. The display flashes a bit, when hard powering off.
- There is no startup-chime. To be exact, there is no sound what so ever. I tried removing both pieces of ram, because this usually results in a beeping signal. But even this doesn't happen.
- I attached my external monitor, and it showed the regular screen. I was able to log in, went to the settings and it recognised the internal monitor as usual. But it still stays black.
Things I tried so far:
- Reset NVRAM
- Disconnect charger and unplug battery for about an hour. In between pressed the on button a couple of times to drain any remaining charge.
- Tried various ram configurations (since that was what I changed recently)
Does anybody have an idea, what the reason for these problems could be?
Is there any analytic/hardware-test tool, that I could run? Keep in mind, that I am able to boot and view stuff on the second screen. However I do not have any access to menus, that show up before the system is fully booted.
I have looked inside the system settings for sound. The regular sound card as an output device is completely missing. Could this be a problem with the logic board?