The CMOS battery in the Toshiba Satellite Pro 4600 keeps a charge that saves the computer's CMOS settings. If this battery runs out of power, it will need to be replaced, as the computer will not properly function without a working CMOS battery. The CMOS battery in the Satellite Pro 4600 is located under the keyboard inside the computer. Be careful when working on the inside of the computer to prevent damaging any parts.
Insert the tip of the flat blade screwdriver into the small opening on the left side of the panel that is above the keyboard. Gently pry up the panel and peel it off of the computer.
Remove the two screws that were under the panel using the Phillips screwdriver.
Lift up the top of the keyboard. Pull the keyboard up and set it upside down on the bottom half of the computer. Be careful not to put any strain on the keyboard ribbon that is still attached.
Locate the CMOS battery plug behind the keyboard ribbon. This plug has a red wire and a black wire attached to it. Pull the plug out of the socket. Wait at least 15 minutes for the CMOS capacitor to discharge.
Pry the CMOS battery out with a fingernail or with the flat blade screwdriver. Insert the new CMOS battery, making sure it is facing the same way as the old battery.
Plug the CMOS battery plug back into its connector. Turn the keyboard over and put it back into position.
Replace the screws that hold the keyboard in place. Slide the panel back into position. Press down along the panel to snap it into place.