POST stands for "Power-On Self-Test," which is a built-in utility that scans your hardware and system configuration to confirm that all components are in proper working order. After performing the POST, the computer prepares itself to boot to the operating system. If your ASUS computer fails to run POST at start-up, a loose connection or defective component could be to blame. Alternatively, although it may seem as if the computer won't boot, the system may be attempting to communicate start-up problems via the ASUS Post Reporter, a utility that converts beep codes into voice messages. To enable POST and update your BIOS to the most recent version, perform a few troubleshooting steps to determine the source of the problem.
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Things you need
- Phillips screwdriver
- Speakers or headphones
Sign on to a different computer and go to the ASUS website (see Resources.) Select your region from the options.
Point to "Services," then click "Support." Click "Download." Select your product information from the drop-down menus.
Click "Search." Select your ASUS computer's operating system from the drop-down menu, and then click "Search" again.
Expand "Manual." Download your computer's documentation from the website. The download usually takes less than a minute on a high-speed Internet connection, but may take several minutes using a dial-up connection. Double-click the file to open it.
Review the table of contents to locate the chapter on "Vocal POST Messages" or "ASUS POST Reporter." Print the pages included in the chapter.
Connect speakers to the appropriate audio jack located on the rear of the computer. Power on the system to listen for any POST messages. If your ASUS reports a problem, read the instructions in the chapter's "Action" field to resolve the issue.
Turn off the computer. Loosen the screws securing the cover to the case, and pop the cover off the case. Touch the chassis to ground yourself.
Locate the CPU fan. The CPU fan is square and is approximately 80mm to 120mm in size. A black case houses the fan blades. Power on the computer. If the fan fails to spin, turn off the computer and confirm that the CPU fan cable is connected securely to the motherboard.
Disconnect the power cable from the rear of the computer. Confirm that the cable or cables connecting the power supply to the motherboard are secure.
Confirm that all of the connections on the motherboard are secure. Check that the CPU, heat sink, expansion cards and memory modules are properly seated and installed.
Release the lever securing the coin-shaped CMOS battery in place. Use your fingers to extract the CMOS battery from its slot.
Insert the battery into an anti-static bag, and leave it in a safe place overnight to reset the computer's CMOS settings.
Reinsert the CMOS battery into its slot. If the computer still fails to POST, the motherboard or power supply may need to be replaced.
Go to the ASUS Support Page (see Resources) and enter your product information. Select your operating system from the drop-down menu.
Left-click the "+" next to the "BIOS" category. Click "Global (DLM)." Select a folder to save the file to, and then press "Enter" to download the latest update for your BIOS from the list.
Click "Exit" followed by "Start," "Computer" and "Windows Explorer." Go to the folder you saved the file to, and double-click the file to open it. Left-click the first item in the file. Hold down "Shift," and then press "PGDN" to select all of the files shown.
Minimise all of the windows except "Windows Explorer." Double-click the title bar to make the application smaller. Drag-and-drop the highlighted files to the portion of the desktop displayed on the screen.
Click the "+" next to "BIOS-Utilities." Click "Global (DLM)" and select a location to save the "Windows BIOS Flash Utility" to. Press "Enter" to download the file.
Return to "Windows Explorer" and locate the "Windows BIOS Flash Utility." Double-click the file, and minimise all of the windows except "Windows Explorer." Left-click the file in the folder, and then drag-and-drop the file onto the desktop.
Launch the Windows BIOS Flash Utility. Follow the on-screen instructions to update your BIOS. The computer will restart automatically once the update is complete.
Tips and warnings
- If your ASUS is a laptop, connect the AC adaptor to the computer before attempting to flash the BIOS.
- ASUS requires you to enable a special plug-in to download the files. When a yellow bar appears at the top of the browser, left-click it and then click "Install." ASUS will install the plug-in to your computer and start the download automatically.
- Do not power off the computer while updating the BIOS, as this could render the computer unable to boot.
- Static electricity can permanently damage the components installed to your computer. Do not handle the hardware inside the case without first grounding yourself. Ideally, wear an anti-static wrist-strap and stand on an anti-static mat to protect your computer.
- Do not open the case to your computer without first consulting ASUSTeK. Opening the case to the computer could void the warranty.
- Not all computers may come with the ASUS POST Reporter.
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