How can I remove BIOS unknown password on HP 620 laptop
Well removing the CMOS battery is a good Idea but if you really want to bypass the Bios you can try and use one of the following things:
- Remove the CMOS Battery as stated above.
Download this Tool: BIOS320.EXE Note: This Tool only works with 32bit Operating Systems!
!BIOS is a freeware utility which is designed to be a whole BIOS and security suite. It has the ability to decrypt the passwords used in some of the most common BIOS makes such as Award, Phoenix, American Megatrends, IMB etc.. It also has the ability to brute force the password (known as “blasters”). However, this method is dangerous and can result in some unexpected and unwanted results. Note: Because of this applications password cracking abilities, some antivirus software may report it as a virus/trojan. This is a false positive. To start using !BIOS, reboot your computer and take note of the BIOS type and version you are running. For example, If your motherboard uses Award BIOS you should look for the text “Award Medallion BIOS 6.0″ or something similar.You can Try and use one of the following Backdoor Passwords:
On many computers (especially old ones), computer manufacturers build in backdoor passwords for their own technicians to use so they can access the BIOS when the hardware is being serviced. Here are some of the ones that have been reported. You may need to try quite a few passwords before you find one that works These passwords are CaSe SeNsItIve.
AMI BIOS Backdoor Passwords: A.M.I. AAAMMMII AMI AMI?SW AMI_SW BIOS CONDO HEWITT RAND LKWPETER MI Oder PASSWORD
Award BIOS Backdoor Passwords: (eight spaces) 01322222 589589 589721 595595 598598 ALFAROME ALLY ALLy aLLY aLLy aPAf award AWARD PW AWARD SW AWARD?SW AWARD_PW AWARD_SW AWKWARD awkward IOSTAR CONCAT CONDO Condo condo d8on djonet HLT J256 J262 j262 j322 j332 J64 KDD LKWPETER Lkwpeter PINT pint SER SKY_FOXSYXZ SKY_FOX syxz SYXZ TTPTHA ZAAAADA ZAAADA ZBAAACA ZJAAADC
Russian Award BIOS Passwords: %øåñòü ïpîáåëîâ% %äåâÿòü ïpîáåëîâ%
Phoenix Backdoor BIOS Passwords: BIOS CMOS phoenix PHOENIX
Other Manufcaturers Backdoor Passwords: (manufacturer name – password) VOBIS and IBM – merlin Dell – Dell Biostar – Biostar Compaq – Compaq Enox – xo11nE Epox – central Freetech – Posterie IWill – iwill Jetway – spooml Packard Bell – bell9 QDI – QDI Siemens – SKY_FOX SOYO – SY_MB TMC – BIGO Toshiba – Toshiba
Source: How to Bypass or Remove a BIOS Password