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Lenovo T450s bios/supervisor password (help needed, will donate)
#1
Hello,

A complete beginner here so I am sorry if I say or ask something stupid.
Recently I wanted to upgrade to Windows 10 on my Lenovo ThinkPad T450s 20BW. When I tried to access the BIOS settings I realized I need a supervisor password to access BIOS. I don't have the papers that came with the laptop and I don't remember the password. If I just press Enter I can access the BIOS settings but many options there I can't modify. I read somewhere I can try to unplug the CMOS battery and regular battery. After trying that I am in even more trouble because now I have Error 0271 - Check Date and Time Settings on the screen when I turn on the laptop. I spoke to Lenovo support since my laptop is still under warranty but they want to replace the motherboard which is insanely expensive. I was told my laptop is a newer generation of Lenovo laptops that store the supervisor password differently comparing to older models and resetting the EEPROM chip using jumper method will not work. I was also told the supervisor password can be recovered or reset with the help from the people here if I have the dump from the BIOS chip. 
Anybody here can help? Willing to donate if my laptop is fixed.
Thanks in advance.
find
quote
#2
(06-18-2016, 12:02 PM)barbus Wrote: Hello,

A complete beginner here so I am sorry if I say or ask something stupid.
Recently I wanted to upgrade to Windows 10 on my Lenovo ThinkPad T450s 20BW. When I tried to access the BIOS settings I realized I need a supervisor password to access BIOS. I don't have the papers that came with the laptop and I don't remember the password. If I just press Enter I can access the BIOS settings but many options there I can't modify. I read somewhere I can try to unplug the CMOS battery and regular battery. After trying that I am in even more trouble because now I have Error 0271 - Check Date and Time Settings on the screen when I turn on the laptop. I spoke to Lenovo support since my laptop is still under warranty but they want to replace the motherboard which is insanely expensive. I was told my laptop is a newer generation of Lenovo laptops that store the supervisor password differently comparing to older models and resetting the EEPROM chip using jumper method will not work. I was also told the supervisor password can be recovered or reset with the help from the people here if I have the dump from the BIOS chip. 
Anybody here can help? Willing to donate if my laptop is fixed.
Thanks in advance.

Hey, did you get this resolved?
find
quote
#3
Hello !

I'm sorry in advance for my bad language.. but i'm just a french boy xD.

So, i think that my curiosity has been cost me expensive..

I wanted dump my bios on my Lenovo T450 like " barbus " the dump is ok with my usb programmer CH341A,
the problem is, when i flash or replace the backup bin file in my chip bios ( winbond ), the t450 lock on black screen ..
If anyone can help me or give me information about my flash.. i will thank him.
i would tell you that i have unplug battery ( the both ), Cmos battery, and RAM during the dump and flash bios.
i wish i will understand my text.
sorry and thks in advance.

ps: i can give you my dump file if you want to analyse it .. thks again.
find
quote
#4
Hi,
I have a Lenovo Thinkpad T450s with supervisor password. Can anyone help me.
Below is the bios dump file extracted from the laptop.
Thank you in advance.
www find
quote
#5
(12-27-2020, 01:25 PM)chadreuel Wrote:
Hi,
I have a Lenovo Thinkpad T450s with supervisor password. Can anyone help me.
Below is the bios dump file extracted from the laptop.
Thank you in advance.
Рш
I have already replied to your message
Check your PM
find
quote
#6
Hi,
I have a Lenovo Thinkpad T450s with
I can't give details because the bios crashed
type 20BW
can you help me please
find
quote
#7
(12-24-2021, 04:54 PM)ircpoLice Wrote: Hi,
I have a Lenovo Thinkpad T450s with
I can't give details because the bios crashed
type 20BW
can you help me please
Hi
Need your bios dump
Check your PM
find
quote


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