MBP beeping noise

[4now]

MBP SR 2.2GHZ 15IN

In the past week my MBP has started acting weird. It mostly happens while I am away from the computer. I return to hear a beeping noise. I quit all my apps one by one, but eventually I need to reboot. (( I have only noticed this noise before when I accidentally highlighted and tried to open too many files at once. As they continue to launch I would hear the beeping noise. ))

Today it happened again, with a new behaviour.. Mac Mail was continually scrolling through my mailbox list. Safari was scrolling down the page to the end of the page. When I dragged the bar up it would scroll back down to the end as soon as I released it.
And during this there is the beeping noise
Is my trackpad starting to act up?

 

[firemedicmark]

Do you have apple care remaining?

 

[4now]

 

[Surely]

Have you added RAM?

 

[4now]

added ram over a year ago
matching sticks

went from 2G

to 4G

 

[Surely]

Do you have your old sticks? If you do, try putting the old ones in and seeing if the same problem occurs.

IIRC, your RAM may be malfunctioning.....

 

[4now]

yeah I do have my old sticks - somewhere in storage

thanks for the suggestion

 

[4now]

now I wonder if it was something laying on the keys of my wireless keyboard - in the other room