MacBook freezing when I press the keyboard hard or lift the unit from

My MacBook freezes if I tap the space bar or anywhere near the bottom of the keyboard.

The same problem occurs if I push on the battery or lift the MacBook from underneath.

Sometimes it refuses to start and beeps 3 times as if the RAM has been improperly installed.

Can anyone recommend what to do? It’s an A1226 with an SSD and 6GB RAM.

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Take the battery out and inspect it. Is it laying flat when resting on the desk outside up? If not your battery has failed and you'll need a new one.