Hi Karan,
Are the beeps long or short - this is very important.
I am guessing that it is 3 long and 2 short beeps for either loose or defective memory modules. Is that correct? If so read on.
This can probably be fixed by reseating the RAM by tasking them out and then putting securely back into the slot.
[post|809671|Here is the link to the Maintenance ans Service Guide|new_window=true]
How to open the case is started on page 35.
The memory modules are on page 44.