toshiba tecra a8 bios pasword

[alihomee]

how to remove the bios pasword on this model

[alihomee]

Re: toshiba tecra a8 bios pasword

i take out the cmos battery for one day but still cant succeed to break the pasward

[alihomee]

Re: toshiba tecra a8 bios pasword

any one

[robrock1]

Re: toshiba tecra a8 bios pasword

Try to recover bios from pendrive or cd, same way if the bios is dead, if you are lucky it will erase the password too, if not you have to replace keyboard controller and the bios ic, or if there is an extra ic for the password, i remember some years back this toshiba i replaced 3 ic, to remove the password if you dont do it this way the screen will stay blank.

[alihomee]

Re: toshiba tecra a8 bios pasword

can u tell me the pasward is stored in which chip bios or contrller

[alihomee]

Re: toshiba tecra a8 bios pasword

any one who knows what should i do

[heavyice]

Re: toshiba tecra a8 bios pasword

Try to recover bios from pendrive or cd, same way if the bios is dead, if you are lucky it will erase the password too, if not you have to replace keyboard controller and the bios ic, or if there is an extra ic for the password, i remember some years back this toshiba i replaced 3 ic, to remove the password if you dont do it this way the screen will stay blank.

Why removing the keyboard controller necessary?

[robrock1]

Re: toshiba tecra a8 bios pasword

I cant find the website anymore, the reason is that there is an encrypted hash of the keyboard controller and the bios ic, each of them contains half of the number, the two together makes the whole hash. The number is generated everytime the bios is flashed, this is why changing the bios ic alone does not work because the number will be different. You have to take off the ic`s from another board all together. Its a security feature, this tecra laptops are for business users as i remember, its similar to the ibm thinkpad. I already tried replacing only the bios ic and also flashing it but the screen stayed blank. If you google it maybe you can find the website where they describe it in detail.

[dycc]

Re: toshiba tecra a8 bios pasword

chips are 24c02 and 24c08

[camelion]

Re: toshiba tecra a8 bios pasword

ok your solution read 24c02 and erase link see pic

[cyberhack]

Re: toshiba tecra a8 bios pasword

keyboards

[alihomee]

Re: toshiba tecra a8 bios pasword

i cant understand this table can u discribe this is for what.......thanks

[dycc]

Re: toshiba tecra a8 bios pasword

camelion what for 24c08 chip

[robrock1]

Re: toshiba tecra a8 bios pasword

you have to read out the eprom then you open the file with any hexeditor go to this address, erase the data as shown, save it and flash it back to the eprom, this will clear the password.

[alihomee]

Re: toshiba tecra a8 bios pasword

i got this from toshiba website

[emd110]

Re: toshiba tecra a8 bios pasword

sorry how we can read out the eprom?

[highpulse]

Re: toshiba tecra a8 bios pasword

Dycc got this board , and the chip itS a 24c08 , i have done in the past a reset , that was needing to bypass between pin 5 and 6 in a different laptop , altough dont remeber the model , any tips?

[highpulse]

Re: toshiba tecra a8 bios pasword

ohh ok , i got it now , im reading the 24c08 eheh and im going to fill with 0 does lines above

[highpulse]

Re: toshiba tecra a8 bios pasword

well i guess for the 24c08 the adrtess thaTmust be erased is in another location,

so anyone can share with HEX lines i must set to 0(FF) , since i've done that above on the 24c08 chip and it didnt work , still asking password

[highpulse]

Re: toshiba tecra a8 bios pasword

i leave here the dump of my M24C08 , if someone can delete the Bios password , altough i apreciate if someone can post here as well the adress changed picture for future works