Macbook won't start and continuously beeps

Help

I have the same problem but it beeps for less than a second every five seconds or so.
Before that it froze while trying to connect to the Apple store via iTunes.
Keyboard, mouse and pad were all useless.
A long press on the power button switched it off
I reset the SMC but it had no effect. (Removed battery and power cable. Pressed power button for 5 seconds.)
Now it has a black screen and the recurring beep.

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