My Computer Says That the System Failed the CPU Test
If you receive an error telling you your computer has failed the CPU test, this can be a result of issues in your BIOS, your computer overheating or faulty hardware. While your data is not often at risk with these errors, you may not be able to use your computer until the issue is corrected. Many problems can be corrected by resetting your BIOS or replacing a single part, though if your CPU and motherboard have failed, they will need to be replaced as well.
Restore BIOS to Defaults
If your BIOS settings have been corrupted or changed to something that will not work with your current setup, your computer may not be able to load at all. If you are still able to start your computer and access BIOS, it is unlikely that you are suffering a hardware failure, and will only need to reset your settings. Start your computer and enter your BIOS screen; the key you need to press will be displayed on the splash screen. Navigate to the "Exit" tab, then look for an option like "Load Setup Defaults" or "Clear BIOS." The exact terminology will vary slightly depending on your computer.
Your power supply provides power to your motherboard, which in turn, powers all your hardware. Without enough power, some hardware may fail, and your computer won't start. One way to troubleshoot this is by looking to see if your computer's fans are spinning when you start your computer. If not, your computer either isn't getting enough power, or your power supply is failing. Check the voltage switch on the back of your power supply to make sure it hasn't accidentally been moved. If you have the ability to do so, you can also test your power supply in another computer; if the other computer stops working, you'll need to replace your power supply.
Check Computer Cooling
Even if your fans are running, your computer could be running hot without proper circulation. This can also happen if you have overclocked your computer and your CPU cannot handle it. Take apart your computer and make sure the vents, fans and hardware are free of dust. A buildup of dust can be harmful to the point where your computer will not even start up after a cooling period. If you have overclocked your computer and want to undo this for troubleshooting purposes, resetting your BIOS will undo this process.
Replace CMOS Battery
Your system's CMOS is a chip that stores information about your computer's components, as well as their settings. This data is able to be saved, even when your computer is off, due to a small battery on your motherboard. If this battery dies, your CMOS loses all its data regarding your system, and it could result in a failure that cannot be circumvented until the battery is replaced. Take apart your computer and look for the battery; be sure to note its specific make and type, so that you order the right replacement.
Replace CPU and Motherboard
If all else fails, your CPU and motherboard need to be replaced. When buying a new motherboard, make sure that it is compatible with the other hardware you already have and that it will fit in your case. If you take this opportunity to upgrade, make sure that your current power supply is powerful enough to provide power to your new hardware.
Based in California, James Wright has been writing since 1998. Wright's articles have been published on various websites with a focus on technical fields such as computers and the Internet, and were also featured in a now-retired publication for an online artistic community. Wright studied English, journalism, politics and psychology at Riverside Community College.