POP password appeard after cmos battery removal (R51)

[aquasonic]

Hello again! After having some issues with my R51 i decided to remove the cmos battery just in case... but now i am stuck with another problem. When it boots, with F1 (or access ibm button) or normaly, it will ask me for a power on password. This is weird, since it never asked me before. The motherboard is bought from ebay. removing again the battery won't help. Any suggestions?

[Harryc]

If you don't know the password the system board will need replacement. We won't allow any discussion here on how to defeat security passwords.