Buzzer 3 times from buzzer component on motherboard, not from the Processor.
Central Processing Unit. Another term used is Microprocessor, or simply Processor for short.
Buzzing, or beeps actually, that you hear are BIOS Beep Codes. The computer's way of telling you something is wrong, and an area to look into for it.
3 beeps generally means a problem with the Ram Memory.
Computer unplugged from power, Anti-Static Precautions FOLLOWED, suggest removing all Ram Memory module/s ('Stick'), and clean the gold plated contact pins with a pencil eraser.
1) Anti-Static Precautions:
Your body carries Static electricity. Static WILL fry out (Short Circuit) the delicate hardware components inside a computer.
Relieve your body of Static BEFORE working on your computer.
Computer on a table, computer Unplugged from power, computer case open;
TOUCH an unpainted surface, of the metal frame of the open computer case.
This action will relieve your body of Static.
IF you leave your computer in the middle of working on it, be SURE to Touch the metal frame again upon your return.
[You can click on the photo to enlarge ]
If you are using an eraser on the end of a pencil, and not a solid eraser, refrain from letting the metal band on the pencil, touch the gold plated contact pins.
Everywhere on the Ram Memory module EXCEPT the gold plated contact pins at the bottom; is the BODY.
The Body is coated with a see-through protective plastic.
Handle the Ram Memory module by the Body.
Rub up, and down on each gold plated contact pin. BOTH sides.
Doesn't take much pressure, nor rubbing to clean a contact.
(Maybe 6 to 8 times up, and down)
In fact when you are done, the contact pins may not look bright, and shiny.
They are clean I assure you. Doesn't take much 'corrosion' to make a bad contact surface. (Gold isn't supposed to corrode)
Use air to remove the eraser dust. If you have a can of compressed air available use it. If not air pressure from your mouth will be sufficient.
If the air is available use it to clean out the Ram Memory slots also.
Reinstall all Ram Memory modules.
(Make sure they are seated tight, and locked in)
Make sure the inside of the computer is clean, and to include the inside of the unplugged from power Power Supply, the best that you can.
Post back in a Comment as to your findings afterward.