Supervisor password on Lenovo T490 and T490s

[Vesko356]

Read the whole thread before asking for help. This model can't be unlocked by Lenovo autopatcher.

https://www.badcaps.net/forum/troubl...41#post1568841

https://www.badcaps.net/forum/troubl...87#post1568887

[jozlar]

Re: lenovo thinkpad t490 bios password



Here

please help t490s nm-b891 unlock please patching help me

[binhraucomputer]

I have a lenovo laptop with bios password stuck. Can anyone who has done it tell me how to wire the jtag and am using a rt809h reader?

[rex98]

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.

[HAWKAR]

Re: Supervisor password on Lenovo T490 and T490s

hello
how i can use my r809h for t490 to read the ec? how i can connect it with this board?

[mgjini]

Re: Supervisor password on Lenovo T490 and T490s

@mgjini
You don't have to edit anything, the programmer is properly connected as you could read the EC, the next step would be to reprogram the EC with the same file on post #48 (the reprogramming should take care of the EEPROM contents when the chip is erased prior to programming). After a successful programming then remove all source of energy, reconnect and that should have take care of the Supervisor Password, then you just need to use the Lenovo Maintenance Utility to type the DMI information.

Hi thank you for your advise I will try that in my future laptops as I have some x390 also and want to test on that, thank you very much I resolved this some
Guy edited for me and I dint have to use dmi, mine is resolved thank you guys

[AAAC]

Re: Supervisor password on Lenovo T490 and T490s

@mgjini
You don't have to edit anything, the programmer is properly connected as you could read the EC, the next step would be to reprogram the EC with the same file on post #48 (the reprogramming should take care of the EEPROM contents when the chip is erased prior to programming). After a successful programming then remove all source of energy, reconnect and that should have take care of the Supervisor Password, then you just need to use the Lenovo Maintenance Utility to type the DMI information.

[mgjini]

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.

Unfortunately I am not quite advanced to edit files so I have to research how to get this done

[mgjini]

Re: Supervisor password on Lenovo T490 and T490s

what programmer did you use to read mec1663?

So the story of programmer is I bought from eBay 2 years ago from eBay from some guy io programmer and when arrived I see the software doesn't work so after researching I had to get in touch with verytanov and paid for his software 50$ so I used verytanov and then jtag one user here has done great job providing the picture

[AAAC]

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.

[rex98]

Re: Supervisor password on Lenovo T490 and T490s

can anyone remove the password from this mec1663 lenovo t490 please nm-b901

what programmer did you use to read mec1663?

[mgjini]

Re: Supervisor password on Lenovo T490 and T490s

can anyone remove the password from this mec1663 lenovo t490 please nm-b901

[mika123]

Re: LENOVO BIOS AUTO-PATCHER for Supervisor Password Removal

Nm-b901, t490 need patch file I7-8TH GEN CPU

[couillu76]

Re: Supervisor password on Lenovo T490 and T490s

i have read the 290kb save it and rewrite it to the ec , i have done x1 gen4, x13, t14 t490 in same way , after that i used the lenovo tool to rewrite the motherboard infos
easy when you know

[pehol193]

Re: Supervisor password on Lenovo T490 and T490s

Hi i have been trying to unlock with svod4 for weeks unfortunatly i have failed because svod can only read 288kb so decide to buy a rt809h this one read the full ec 290kb or more and it work at the first attempt

what you did with dump, to unlock password?

[couillu76]

Re: Supervisor password on Lenovo T490 and T490s

Hi i have been trying to unlock with svod4 for weeks unfortunatly i have failed because svod can only read 288kb so decide to buy a rt809h this one read the full ec 290kb or more and it work at the first attempt

[jogas]

Re: Supervisor password on Lenovo T490 and T490s

ineed this help aswell.please any one

[izaak94]

Re: Supervisor password on Lenovo T490 and T490s

hello can someone help me to read MEC with SVOD3? I need to unlock a T490s

[Pasha_Lu]

Re: Supervisor password on Lenovo T490 and T490s

Thank you.

[volinakis]

Re: Can unlock t490 32mb please ,?

not work just beep beep

try this.