lenovo t590 MEC1663 BIOS PASSWORD

[Arsalan455]

Dear mates: I need to unlock attached file which is having supervisor bios password,
appreciate your help

[Vesko356]

Re: lenovo t590 MEC1663 BIOS PASSWORD

Dear mates: I need to unlock attached file which is having supervisor bios password,
appreciate your help

Read the rules before posting
RULES UPDATE for BIOS requests/offers *AVOID BANNING, READ BEFORE POSTING*
https://www.badcaps.net/forum/showthread.php?t=103570
You MUST:

• Read BIOS guides, methods, resources and tools
• Try the method at BIOS guides, methods, resources and tools before requesting help
• Explain you were not able to succeed with the methods at BIOS guides, methods, resources and tools
• Use search function in case someone already answered your request
• Post under a related thread if it exists
• Provide the full machine model number, serial number (or Service tag, SNID) and the board model number (see https://www.badcaps.net/forum/showthread.php?t=88758 )
• Name your thread with model numbers and request
• Provide a BIOS/EC dump if possible
• Attach files directly to your post instead of linking to external websites
• Post what the problem is, be specific - black screen, no boot, running slow, password.
  Do NOT post "clean me", "clear bios", "clean bios", "bios need" or other such terms

.

[alfredposadas09]

Re: lenovo t590 MEC1663 BIOS PASSWORD

Dear mates: I need to unlock attached file which is having supervisor bios password,
appreciate your help

this is only 2kb

[Markus1741]

Re: lenovo t590 MEC1663 BIOS PASSWORD

Hello everyone,

I would like to ask if anyone has successfully unlocked a Lenovo T590 with MEC163 EEPROM.

I read a lot about it here and ordered an RT809H programmer.

I know to read the MEC1663 EEROM, the resistor coming from Jtag_RST has to be moved from pull-down to pull-up.

Otherwise the JTAG port is not activated.

I also read that the order should be as follows.

All powerless CMOS battery battery power supply.

Connect Jtag port from 1-5 correctly by cable according to RT809H scheme.

Add 10k resistance.

Start programmer software.

Connect the power supply to the motherboard via USB-C.

Select RT809H from list MEC1663 > read 3x and compare content to ensure that the readout was successful.
Clear EPPROM.

Unplug the power supply.

All powerless CMOS battery + power supply

All controllers discharge keyboard controllers NVRAM etc.

Start RT809H again and write back the original EPPROM file.

I would be very grateful for information.

[Markus1741]

Re: lenovo t590 MEC1663 BIOS PASSWORD

Hello everyone,

I would like to ask if anyone has successfully unlocked a Lenovo T590 with MEC163 EEPROM.

I read a lot about it here and ordered an RT809H programmer.

I know to read the MEC1663 EEROM, the resistor coming from Jtag_RST has to be moved from pull-down to pull-up.

Otherwise the JTAG port is not activated.

I also read that the order should be as follows.

All powerless CMOS battery battery power supply.

Connect Jtag port from 1-5 correctly by cable according to RT809H scheme.

Add 10k resistance.

Start programmer software.

Connect the power supply to the motherboard via USB-C.

Select RT809H from list MEC1663 > read 3x and compare content to ensure that the readout was successful.
Clear EPPROM.

Unplug the power supply.

All powerless CMOS battery + power supply

All controllers discharge keyboard controllers NVRAM etc.

Start RT809H again and write back the original EPPROM file.

I would be very grateful for information.

Done !!!!

[12bitvinyls]

Re: lenovo t590 MEC1663 BIOS PASSWORD



Done !!!!

Hello Markus1741, I have the same issue with a locked bios on my t590. I am looking at all the possible ways to unlock and i know t490/t590 are different and cannot patch bios to remove password. I see you succeeded using a RT809H programmer. I am headed that way so can you enlighten me more on the process please? if i understand it correctly, I have to read the mec1663 ensuring the data is correct so read 3x. clear the epprom. discharge the system. read epprom and write the data back. and that unlocks the bios password?

[12bitvinyls]

Re: lenovo t590 MEC1663 BIOS PASSWORD



Done !!!!

Marksu1741
Hello again, i see that you are online. Will you be able to respond please? i would like to unlock my t590 as well

[Stefan Steff]

Marksu1741
Hello again, i see that you are online. Will you be able to respond please? i would like to unlock my t590 as well

Hello!
Do it like this:

1.- Read MEC Chip (you MUST select MEC1633_256K - do not select MEC1633#ISP) - read 3x and compare content to ensure that the readout was successful.

2.- Erase chip

3.- Unplug power from board for 2 Min and unplug programmer also for 2 Min.

4.- -Write dump back that we just read.-Password Is now Gone



Remember to move R/W Resistor Back To Original Position For Normal Operation.

Then,boot from Lenovo utility disk and insert DMI .

SS