Beep code help

[sabersheart]

I have a macbook pro 13 inch from around 2011-2012 and I am having beep codes. They are 3 short then 3 long then 3 short consecutively and repeat after ~30seconds. Please help, I can not find beep codes of this sort online.

 

[Chicano]

See the cause and solution here:

9 Beeps (3 short, 3 longer, 3 short)
https/discussions.apple.com/thread/3962770?start=0&tstart=0

Download the correct Firmware Restoration CD image
https/support.apple.com/downloads/macnotebooks