Supervisor password on Lenovo T490 and T490s

[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

[lint4u]

PLEASE HELP ME

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

[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

[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

[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!

[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.

[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? 🤔

[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!

[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

[jomerfx28]

please help mec unnlock

Follow this steps i made

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

[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]

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

[techrecycle]

hello everyone


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

serial number : PC19K3GL

[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.

[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.

[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

[bobans1983]

Locked bios please unclok. Thanks in advance .

[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.

[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