Yes! You can repair your telephone system by following these simple instructions:1. Remove the screws from the bottom of the phone and take off the back cover.2. Locate the battery and remove it.3. Using a small Phillips head screwdriver, remove the screws from the circuit board and lift it out of the phone.4. Carefully inspect all of the connectors on the circuit board for signs of damage or corrosion. 5. Use a cotton swab dipped in alcohol to clean any oxidation or dirt from the connectors, then replace the circuit board and reattach all of its screws.6. Replace the battery, snap on the back cover, and screw it in place.

It depends on the type of telephone system you have. If you have a landline, then you can call your local phone company and they will send someone to repair it. If you have a cell phone, then you will need to take it to a service center.