Supervisor password on Lenovo T490 and T490s

[jozlar]

helpppppppp

[SMDFlea]

Is it so difficult to type the serial number ?

[SMDFlea]

helpppppppp

• The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.

[jozlar]

• The serial number, make, full model number, motherboard model and revision (except QR codes) must be written/typed at your request as per the rules. Not as a picture, part of the file name and so on.

TYPE 20Q1-S24F00
S/N PC-17RSDV
X390
FT491/FX390 NM-B891 REV 2.0

[SMDFlea]

Off topic,this thread for T490 and T490s

[iori1881]

hello everyone ,

i need to unlock bios password for lenovo thinkpad T490

Serial number : PF-1K1XYW 19/16
TYPE : 20N2-0009UK
FT490/FT492
FT590/FP531
NM-B901 REV: 1.0

THANK YOU.

[techrecycle]

lenovo T490s admin passwords please unlock thanks


sn :PC19K3VK

[SMDFlea]

https://www.badcaps.net/forum/troubl...64#post1864864

[techrecycle]

thanks i tried but not display

[Maxpower3]

T490 or 490S?
try

https://www.badcaps.net/forum/troubl...ss#post3237235

T490 NM-B901 LPC PORT

Thinkpad T490s - NM-B891

[Maxpower3]

helpppppppp

try

[danito]

T490 or 490S?
try

https://www.badcaps.net/forum/troubl...ss#post3237235

T490 NM-B901 LPC PORT

Thinkpad T490s - NM-B891

Lenovo T490 had supervisor password.
After I made it short, I can't enter the bios because it's the user password. Can you help me please?

[theiphone911]

I would like to ask you a question, if you don't mind. While looking at your photos, I had a question: should only one line be touched? If so, which one is the correct one: from 1 to 13 or from 2 to 14? And at which position along those lines should the contact be made?

[Maxpower3]

theiphone911
pin 4 or 6/8/10 only one pin to gnd
During the logo display, or just before the backlight comes on—lasting for 1 to 2 seconds.
after removing the short circuit

https://www.badcaps.net/forum/troubl...66#post3736066


Some people do all the pins at once, but that is not my recommendation.
https://www.youtube.com/watch?v=x5KvZLXA6BM

[Maxpower3]

Lenovo T490 had supervisor password.
After I made it short, I can't enter the bios because it's the user password. Can you help me please?

need many try, look video for timing and procedure

[danito]

need many try, look video for timing and procedure

yes, I didn't succeed. in the end, with the old method of moving the resistance, I succeeded.

[Deniz]

Re: Supervisor password on Lenovo T490 and T490s

LENOVO THINKPAD
T490 T590 FT490 FT492 FT590 FP531 NM-B901 REV 1
this main supports all the models above and the MEC is also unlocked.

Firstly, thank you. How do I connect jtag to write MEC. Can you help?

[Macdonald]

hie i have a Lenovo t490 with supervisor password
i tried to read the MEC1663 using RT809H programmer JTag connection i manged to read the file it with a total size of 192kb the challenge i am getting is when i write it back the file its not switching on
i read my file using MEC1633 #ISP but my my chip is MEC1663
From others i discovered that the file size is 288kb
Serial number
PF-25657G
Type Number
20N3-S7YA06
I am sending the file read
can someone help me thank you

i am using an RT809H programmer

[AAAC]

@Macdonald
I've downloaded and extracted the same EC update version as in your file, trimmed the 32-byte header from the EC update version N2IHT42W, here's the complete file (262,144 bytes or 256kB). Check your programmer and select a chip size of at least 256kB or greater and try, it should work.

[bobans1983]

Locked bios please unclok. Thanks in advance .

[SMDFlea]

Thread merged with existing topic. Read the rules,the laptop serial number must be posted https://www.badcaps.net/forum/troubl...before-posting

[Macdonald]

@Macdonald
I've downloaded and extracted the same EC update version as in your file, trimmed the 32-byte header from the EC update version N2IHT42W, here's the complete file (262,144 bytes or 256kB). Check your programmer and select a chip size of at least 256kB or greater and try, it should work.

Hie i tried it but still its not working the machine is only powering orange light on power and nothing else

[abelkakraba]

Re: Supervisor password on Lenovo T490 and T490s

@mgjini
In my experience, when you erase the EC chip to reprogram it, is when the internal EEPROM contents are erased too, that EEPROM memory hold the Supervisor Password among other data like Model Number, Serial Number, TYPE, etc.

So depending on the programmer you are using the next step is to reprogram the EC chip with the exact file you saved from EC, then use the software utility (ThinkPad Maintenance Utility) that is in another post to program the ThinkPad DMI information.

I've verified the EC file you uploaded, version N2IHT39W, with the corresponding BIOS/EC update downloaded from Lenovo and it is an exact copy; I just had to delete the header from the EC update (first 32-bytes) and the tail starting from 40000h all the way to the end, then I could do the comparison of both files.

I have really learned a lot reading your post, and i am grateful for having kindhearted people like you here. Instead of working on the Jtags to clear my supervisor password on my ThinkPad T490 i mistakenly used the Lenovo patcher with my bios file of 32mb. Afterwards i am not getting any display, can you assist me to get the machine working again.

[EGUG]

@abelkakraba: You only have to write back your original saved Bios. After that it will restart with the same status as before using the Lenovo patcher.

[techrecycle]

hello everyone


please help me to remove svp, file is attached, THANKS

serial number : PC19K3GL

[jomerfx28]

Help for a Lenovo Thinkpad T490s Bios Password or supervisor password, the original bios file, even though a shorts the contacts for tamper protection, it doesnt go off

S/N PC1CX7GV
Lenovo thinkpad t490s
FT491/FX390 NM-B891 Rev 2.0