Macbook pro 2008 beeping noises when base of laptop is not on flat surfaces. Also typing randomly zero's, it think maybe something is loose. Anyone heard of this before?

I bought it refurbished a couple of years ago, been fine in genral. Last couple of months i noticed when different preasure is placed on the bottom of the laptop it is beeping very loudly until i find a flat enough position for it to sit on. Along with this it types zeros into anything i am writing.
Any one had problems likes this or think of a reason for please help me.

My first guess is your battery is swollen. Do you notice any distortion of the bottom part of the case?
2008 MBP has a battery that is user replaceable, so try running the MBP without the battery using the AC adapter.
If in fact a swelling battery is the culprit, the only real solution is to replace it.

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