Supervisor password on Lenovo T490 and T490s

[arif3203]

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.

tested bios display but cannot to change serial number with lenovo uone/lenovo golden key,or maintenance disket 1.89,any solution for change serial number? thank you

[jomerfx28]

please help mec unnlock

Follow this steps i made

https://www.badcaps.net/forum/troubl...e4#post3342869

[Maxpower3]

Follow this steps i made

https://www.badcaps.net/forum/troubl...e4#post3342869

why do all that, when a clean of Mec eprom enough, without having used the lenovo utility

and already unlocked

[Kind_Drop]

Have you tested this method on P53s 20N6 Serial number PF292CDY? I can't find the schematics for this motherboard, and it seems different from the P53. Thank you!

[juanespty]

Hi.

I have a Lenovo T490 (S/N PF-1DN15F / Type 20N3-S1J700) laptop that requests fingerprint authentication or password when powered on:



I've tried to unlock the laptop by following the instructions posted here and here, but so far I've had no luck.

I bought an RT809H programmer and:

• Installed the iFix Programmer Software version 20240116
• Disassembled the laptop and removed the motherboard
• Removed the CMOS Battery
• Moved the 10K resistor to a new location

• Soldered 5 wires (TMS, TDI, TDO, TCK, GND) from JTAG1 in the motherboard, to the RT809H programmer

• Connected the Laptop A/C Adapter to the motherboard so that it has power (I don't try to "turn the laptop on" by pressing any button)
• Tried to read the chip from the Programmer software using the SMSC MEC1633_256K Partnumber (Also tried MEC1633 #ISP)

Whenever I try to read the chip from the programmer, I get this error:

MEC Chip ID: 0xFFFFFFFF
ID verification error.

Also, If I try to auto detect the chip, I get:




Why is it not working? 🤔

[melchizedek]

hello guys,

I have a lenovo t490 i7 notebook.

is there a way to change the password on the lenovo t490 without soldering the motherboard?
At least a procedure to try before soldering motherboard...

Thanks for your reply.

[benjas11]

Hello , I hope someone can help me. I have an Lenovo T490 with motherboard FT490/FT492/FT590/FP531 NM-B901 Rev:1.0 2018-12-28. This laptop looks to have an bios supervisor password because if i type enter it shows bios information but I cant edit anything. My question is if this is posible to clear that password. And it some one can tell me the steps if posible. Thank you!

[jomerfx28]

Hi.

I have a Lenovo T490 (S/N PF-1DN15F / Type 20N3-S1J700) laptop that requests fingerprint authentication or password when powered on:
Why is it not working? 🤔

Maybe you could try to follow this guy's Mec1663Clearpassword dump.

https://www.badcaps.net/forum/troubl...e4#post3203421

Using Mec1633_256K, you can't used auto detect IC on that, because its a MEC1663

[qwerty4512]

I need your help, can anyone help me open the locked bios file? I've tried several dumps here and there is no power
TYPE: T490
CODE:NM-B901
S/N:PF1VJMDX
THANK YOU

[lint4u]

PLEASE HELP ME

Password on MEC1663 IC
Pls Use Veryanov or RT809H to unlock the passoword

[ivanescu]

Good morning, I need help to unlock SVP in a t490s, I was tried with lenovo_autopatcher but it only beeps when I boot it.

S/N: PC1PPZ1P
Type: t490s 20NY
Motherboard: FT491/FX390 NM-B891


I found the SVP in a mail. Thanks