Lenovo b5400

[basemyounes]

Please i need kbc file for program io on motherboard da0bm5mb8d0 rev lenovo b5400

[SMDFlea]

Re: Lenovo b5400

What is the serial number, or model type .

[laptopcenter]

Re: Lenovo b5400

What is the serial number, or model type .

Thank you for answer

Lenovo B5400_Quanta BM5_U45
MB number : DA0BM5MB8D0

[SMDFlea]

Re: Lenovo b5400

Thank you for answer

Lenovo B5400_Quanta BM5_U45
MB number : DA0BM5MB8D0

What is the machine type,or serial number (Type: 20278 ???)

Post your bios backup .

[SMDFlea]

Re: Lenovo b5400

Bios + EC .


DMI
W 6AFF5E
M 40122F
M 401013
SN 40101A

[laptopcenter]

Re: Lenovo b5400

Bios + EC .


DMI
W 6AFF5E
M 40122F
M 401013
SN 40101A

thanks i will try test it and tell you ..

[fefo1993]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

Hi, i have a Lenovo B5400 with locked bios (supervisor password) and seems that Auto-Patcher doesn't work with it.
I tried to flash patched bios, and it boots up because i receive the screen "press any key, press two times space bar, etc.. and the final screen "turn off machine", but when i reflash stock dumped bios, the lock is always here.
Any ideas??
Here my Serial Number: QB08704354
In attachment dumped and patched bios files.

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

Hi, i have a Lenovo B5400 with locked bios (supervisor password) and seems that Auto-Patcher doesn't work with it.
I tried to flash patched bios, and it boots up because i receive the screen "press any key, press two times space bar, etc.. and the final screen "turn off machine", but when i reflash stock dumped bios, the lock is always here.
Any ideas??
Here my Serial Number: QB08704354
In attachment dumped and patched bios files.

try clean this

[fefo1993]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

try clean this

i see inside dumped and patched bios, but i don't have this value like your screen, i have "empty" values (all "FF")

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

i see inside dumped and patched bios, but i don't have this value like your screen, i have "empty" values (all "FF")

yet I find good in both dumps

try test unlock

EDIT : I forgot 2 values, I modified , test both unlock
B8 B8

[fefo1993]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

yet I find good in both dumps

try test unlock

ah ok, now i find it also in my files! so now i clear this 4 lines and will try to dump and check if it works.
can you give me the name of the tool that i can see on the left side of your first screenshot? thanks

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

can you give me the name of the tool? thanks

UEFITools

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

yet I find good in both dumps

try test unlock

EDIT : I forgot 2 values, I modified , test both unlock
B8 B8

if you have error bad SVP data, change the end put back the 8B C5 04 41, remove only the 3 lines from the beginning

look pics for compare with clean by setup

[fefo1993]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

if you have error bad SVP data, change the end put back the 8B C5 04 41, remove only the 3 lines from the beginning

look pics for compare with clean by setup

i have exactly "SVP" error...but deleting the first three lines, now i have black screen and no boot or sound.

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

i have exactly "SVP" error...

do you have access when SVP error or power off direct?
try another maybe

edit:
otherwise we can try a jump here, if no one has any other solution.
After bypass you will have to enter a new password or otherwise blank with entry.
the checksum will thus be corrected, you can leave bypass or remove with a new read and restore the modification

but deleting the first three lines

00 isn't FF

Multi edit We should continue here, https://www.badcaps.net/forum/showth...t=Lenovo+B5400
I hadn't seen that they talked about EC for this model. We are in the right place given the SVP error, must have a mirror map in the KBC maybe.
a moderator can move the thread perhaps ??

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

in the SMDFlea files it's like this
https://www.badcaps.net/forum/showpo...32&postcount=5

[fefo1993]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

do you have access when SVP error or power off direct?
try another maybe

edit:
otherwise we can try a jump here, if no one has any other solution.
After bypass you will have to enter a new password or otherwise blank with entry.
the checksum will thus be corrected, you can leave bypass or remove with a new read and restore the modification



00 isn't FF

Multi edit We should continue here, https://www.badcaps.net/forum/showth...t=Lenovo+B5400
I hadn't seen that they talked about EC for this model. We are in the right place given the SVP error, must have a mirror map in the KBC maybe.
a moderator can move the thread perhaps ??

"test3" file in the rar WORKS! so now i have no password and unlocked bios! thanks!!

[Maxpower3]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

"test3" file in the rar WORKS! so now i have no password and unlocked bios! thanks!!

no point doing the KBC then

[bel77]

need bios file
model : 20278
sn qb07812057

[peste]

post full name and model, motherboard model,etc.



post the contents of the bios chip even if it is corrupted..