Hp compaq nx8220 - Administrator password cannot be reset

Https://www.manualslib.com/manual/705603/Hp-Compaq-Nx8220.html?page=9

I had same issue. The odd thing is that the system asked me a password while having dead CMOS battery. I thought that dead battery seem to not result in CMOS battery removing... But...
1. I replaced CMOS with good battery.
2. I set time and date on the system.
3. I removed good battery, removed laptop battery, pressed power button few times to make sure that circuit is flushed.
4. Turned on laptop with unplugged CMOS battery.
Password disappeared.
Placed back CMOS battery. Now everything works ok, BIOS is accessible. Miracle.

If this issue started with a motherboard error that appeared to be a faulty CMOS battery and then it started incorrectly detecting your memory and now is asking for a password it could be a faulty motherboard. If you are 110% you or anyone else has set a password on that laptop then I would say your motherboard needs to be replaced. It is a difficult process to reset admin passwords on most laptops due to a security chip that will prevent the trick of removing the battery from working. In all honestly if no one has set a password and the motherboard THINKS someone has then even if you reset the password you will still have issues. There is a small chance your CPU or RAM could be defective. But, again going back to it saying you have a password set that was never set. It just yells faulty motherboard unless someone has set a password without you knowing.