my built in speakers ar no working can you help thank u

Things to try:

Quit all applications, disconnect all peripherals that may be plugged in, reboot

Try going to System Preferences/Sound/Output and see if you can select built in speakers

Try taking a set of headphones and plugging them in and out several times

Trya pram reset:

Power off, power back on holding the following keys:

OPTION COMMAND P R

Continue to hold these keys till you hear the start chime 2 times then release, reboot.