![]() ![]() From this program, a user can change settings in the BIOS and upgrade the BIOS as well. The BIOS/UEFI resides on a ROM chip and stores a setup program that you can access when the computer first boots up. If any errors occur, the BIOS/UEFI reports them as part of the testing stage, known as the power-on self-test (POST). It tests and initializes components such as the processor, RAM, video card, hard drives, optical, and USB drives. It prepares the machine by testing it during bootup and paves the way for the operating system to start. This boot firmware, also known as System BIOS or, on most recent systems, unified extensible firmware interface (UEFI), is the first code run by a computer when it is booted. The Basic Input/Output System (BIOS) is an essential component of the motherboard. Using BIOS/UEFI Diagnostics-In this section, you learn about diagnostic features built into many BIOS/UEFI chips. Introduction to BIOS/UEFI-This section explains the motherboard’s firmware, known as the BIOS or UEFI.īIOS/UEFI Configuration-This section demonstrates how to access the BIOS and modify settings for example, RAM, processor, and video settings.įlash Upgrade BIOS/UEFI-In this section, you learn how to upgrade the BIOS through a process known as flashing. This chapter covers the following subjects: Please return the memory and request single-sided modules with the same density.CompTIA A+ 220-901 and 220-902 Cert Guide, 4th Edition If your system is only reading half of the new module's memory, and the module has chips on both sides, then your system probably will only recognize single-banked or single-sided modules.(This is not an error - some systems must do this to update their CMOS settings.) If you get a memory mismatch error follow the prompts to enter setup, then select save and exit.Some systems go in reverse order, so if this doesn't work, try reversing the procedure. Fill your slots starting with the largest density and working to the smallest (put the largest module in slot 0, and the second largest in slot 1, and so on).Using EDO or SDRAM in a system that does not support it will not work, often resulting in a blank screen and no POST (power on self test), or a BIOS/CMOS setup error. FPM/EDO/SDRAM, parity/non-parity/ECC, buffered/unbuffered). Make sure that your new memory is the same type as your old memory (i.e.Remove and reinstall the modules to make sure that they are seated securely in the socket.To update your BIOS, contact your system or motherboard manufacturer and they'll direct you to where you can download the software for free. Don't worry - updating your BIOS isn't as difficult as it sounds. If your computer is older, it may need a BIOS (Basic Input Output System) update in order to work with today's technology. ![]() ![]() Make sure all cables are firmly lodged in their sockets. We get multiple calls about memory not working when the computer just needs to be plugged in! Double-check internal cables.ĭid you accidentally bump one of the wires or cables inside your computer while you were installing your modules? A loose hard drive cable can prevent your computer from booting up properly. Make sure all your power cords are plugged in. It could be your operating system, because there's a maximum amount of memory that a Windows-based operating system (OS) can accept. The problem may not be due to your hardware. If installed properly, the clips on the side of module should snap into place on their own and a thin portion of the gold pins - 1/16th of an inch or less - should be visible (about the width of a line of pencil drawn on a piece of paper). While this may seem like a lot of force to use on a small module, it's necessary to properly "seat" the module. Make sure the notches in your module are lined up with the keys in the slot, then press down using 20 to 30 pounds of pressure. Press harder when inserting modules into the memory slot. ![]()
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