![]() There are a couple of major BIOS manufacturers, including Phoenix. The Phoenix BIOS (Basic Input/Output System) is a simple program that resides on the CMOS ROM (Read Only Memory) chip on a computer system's motherboard. Once the settings are saved, the system will start, and the password will have been removed. Work slowly and read the screen directions thoroughly. Follow the directions on the monitor for changing the date, boot sequence, and any other settings. You may need to reboot a few times to see the message, as it appears on the screen for just a few seconds.Ĭarefully read the settings information on the monitor. The message will tell you which key to press to enter the BIOS setup. Turn on the computer and closely watch the monitor for the "Entering Setup" message that appears before Windows starts. Look for the setup message on the monitor. Close the computer case and tighten the screws. Return the battery to the motherboard, and reconnect any cables that were disconnected in the case. Avoid touching anything else in the computer. Leave the battery out for 20 to 25 minutes to allow the capacitors to completely discharge any memory. Remove the CMOS battery carefully so as not to snap or break the clamps. Leave the battery out for at least 20 minutes. Use the digital camera to take pictures of the motherboard, or sketch the location of cables and connectors.į any components or cables need to be moved or unplugged to reach the battery, you want to remember their exact location. Note the location of any cables that need to be disconnected. The battery is circular, about the size of a dime, but as thick as two to three stacked dimes.ĭo not disconnect or remove anything yet. If contacting the motherboard manufacturer failed, you will have to remove the battery. Locate the CMOS battery while you have the case open. The motherboard battery is round and fairly flat. ![]() The brand name could be printed anywhere or, sometimes, not at all. A flashlight and magnifying glass are especially useful for a clear view of the motherboard. Examine the motherboard for a brand name.Ī good place to start searching is near the processor, the large square box on the motherboard. Printing on a motherboard can be hard to see without a magnifying glass. Look for the motherboard, the largest circuit board inside, attached to one side of the case. Use the screwdriver to loosen and remove the screws from the case. Ground yourself by wearing an antistatic wristband clipped to the metal case, or touch something metal before you open the case. Unplug the monitor and all peripherals from the PC, including speakers and USB devices. ![]() You will need to open the computer case if you do not know the motherboard brand.Įlectrostatic discharge can reset a BIOS password. BIOS passwords are case sensitive.Ĭontact the motherboard's manufacturer if the back-door passwords failed.įind the motherboard's website for technical support. Try using the following back-door passwords to access the BIOS: phoenix, PHOENIX, CMOS, BIOS. So-called back-door passwords may help you access the BIOS. If the manufacturer is unable to help locate a password, standard back-door passwords may help. Have your computer model number and serial number ready. Sometimes you can gain access to the BIOS through the keyboard, depending on the computer, but typically the solution is mechanical.Īll computer manufacturers have websites with technical support available. If the password is lost or has been reset through electrostatic discharge, it would be impossible to guess without the aid of computer forensics. The basic input/output system, or BIOS, is a program that acts as a digital liaison, managing communications between peripherals and the operating system.īecause the BIOS is critical to the operation of a PC, some computer manufacturers and workplaces employ a password for security.
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