HP 640 G4 BIOS Security Device Problem

[lekvilius]

Hello!, i've got Hp 640 g4 that recently had bios reflash by someone else due to having password and now when you turn it on after 30 seconds of black screen it posts with message: security device problem. I don't have original bios to flashback and just remove password. Does anyone know how to solve this bios problem? Also serial is different in bios than it is on the bottom cover so maybe that's the problem?

[hoaca388]

Re: HP 640 G4 BIOS Security Device Problem

This error may be caused by incorrect DMI information, try using HP DMI Tool NBDmiFit to declare it again.
https://www.badcaps.net/forum/showthread.php?t=69204

[lekvilius]

Re: HP 640 G4 BIOS Security Device Problem

I tried few versions of NBDmiFit, i can boot to it, but can't unlock to MPM mode to change serial and etc. Any other way to change serial and UID please? Or how to unlock it to MPM mode?

[hoaca388]

Re: HP 640 G4 BIOS Security Device Problem

I tried few versions of NBDmiFit, i can boot to it, but can't unlock to MPM mode to change serial and etc. Any other way to change serial and UID please? Or how to unlock it to MPM mode?

Have you tried it yet?

[2667388155388299]

hi, i had 2 Posts here and actually they habe been deleted. Why?

[SMDFlea]

You hijacked the thread.Your model is "Z4 G4 workstation" ,its not a "640 G4" laptop .Post your request in a related thread -> https://www.badcaps.net/forum/troubl...-hp-z4-g4-bios ,and also read the rules -> https://www.badcaps.net/forum/troubl...before-posting