Pins 1-2 once shorted will clear NVRAM and reset all ESCD Settings This is another method that can be used to reset the BIOS on the system by simply removing the CMOS coin cell battery and then clearing power from the system.
This is commonly done if you cannot access the jumpers or if you are dealing with a laptop system.
Once the jumpers are correctly set and power is supplied this will then reset the BIOS on the system. The NVRAM will be cleared when the jumper is closed (use the jumper from the password bridge (PSWD)).
To properly clear; AC power must be applied (not necessarily turned on) to the system for about 10 seconds while the jumper is closed.
The information stored in the BIOS (Basic Input/Output System), known as ESCD (Extended System Configuration Data) can occasionally become corrupted due to a variety of situations such as power events, incorrect settings by the user, hardware incompatibility due to a specific setting, or a No POST or No Video scenario.
In these cases it is sometimes necessary to reset the BIOS or CMOS (Complementary metal–oxide–semiconductor) to "Factory Defaults", or in other circumstances, clear the NVRAM (Non-Volatile Random Access Memory) Caution: Be careful when altering BIOS settings.
Unfortunately, access to computers can, at times, be blocked for all of the wrong reasons.