There are some certain ways to clear your computer’s CMOS. The most used method is to find the jumper on the motherboard and move it on the “clear” position. This will erase the settings stored in CMOS and it does not remove the BIOS itself, only the user defined settings. When you will clear your CMOS, you will receive a message like “CMOS Checksum Error” on the first reboot after cleaning it. On the next reboot, you can enter the BIOS setup and reconfigure the settings and customize them according to your preferrences. Clearing CMOS on HP laptops is an easy procedure, like on most of the available brands on the market.
An alternative to the previous method is to remove the CMOS battery from the system and then mount it back again after 8 to 15 hours, because that is the necessary time for the battery to lose the settings. Once it is clear you will get the message “BIOS checksum error” and you should press F1 to enter setup and modify the settings, or the other possible message “CMOS Checksum Error-Defaults Loaded”
The CMOS battery can be cleaned also by forcing a change in the system’s configuration. Changing a part of hardware, for example, like adding or removing some memory SIMM’s may cause an CMOS error and you should be able to change the CMOS-BIOS settings.
There are certain systems on which clearing the CMOS can be done by pressing the Ins key during the startup of the system. Holding the key pressed a few seconds might clear the CMOS and restore the default settings, but again, I have to mention that this method doesn’t work on all computers.
Some boards don’t accept that the movement on the Clear position to be done when the computer is on, so you must make this change while the computer is off, and then restart it, because the main board can be damaged if it is not turned off. If you have a password set up for accessing the CMOS or BIOS settings, you can usea program to either locate and identify the password and reveal it to you or erase the password. These utilities are called password by-pass or cracks.
A very important aspect is that you should read first the motherboard’s manual and see which is the best procedure for that system, and then, if that one doesn’t work, try the alternatives described here. You can try doing this alone now, because you have found out how to clear the CMOS on your HP laptop, and not only.
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