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ThinkPad Thunderbolt 3 failure: What's happening, why it's happening, and how to fix it

https://www.notebookcheck.net/ThinkP....451207.0.html
https://nadim.computer/posts/2018-10-26-thinkpad.html
https://pcsupport.lenovo.com/ca/en/solutions/ht508988


ThinkPad Thunderbolt 3 Firmware attached,extracted from lenovo updates,plus links to driver downloads.Some models have 2 different firmwares, TBT.bin and AssistTBT.bin for the models that support or have bios assist enabled. NOTE:...

Lenovo ThinkPad T490s NM-B891 Schematic...

Here is all the info you should need to remove bios password from your same model or one with an MEC-Chip and also write back the config data

T14s - MEC-1663 - Jtag - Pinout - Bios Password Removal

See Diagram for Wiring.

Use MEC-1633#ISP on your RT809h
This is same Jtag pinout and method for T490S/X390
(But your R/W 10K Resistor Location May In a Different Location)


MEC-Chips Store Bios Password In a Secure Un-Editable Area

Following steps clear that secure area to re-initialize itself to default (Blank)
...

I would like to receive confirmation that the following considerations are correct:

I have a Lenovo ThinkPad T490s (NM-C891) with 16GB RAM (8 chips) soldered on the mainboard.
MemTest86 reports the following errors:
Lowest Error Address: 0x1F97B0930 (8087MB)
Highest Error Address: 0x1FB7B6DB0 (8119MB)

Dividing the 16GB into address ranges per chip I get the following table:
#1 0x000000000 - 0x07FFFFFFF
#2 0x080000000 - 0x0FFFFFFFF
#3 0x100000000 - 0x17FFFFFFF
#4 0x180000000 - 0x1FFFFFFFF
#5 0x200000000 - 0x27FFFFFFF
...

I am testing a ThinkPad T490s with this setup: only the bare mainboard NM-B891 with a fan and the small Power-On daughterboard as well as with a USB-C monitor (no BIOS battery!).

If I connect a battery, the mainboard starts up normally. After about 50 seconds the logo appears and after another 30 seconds the final message “... System configuration is invalid. Press Esc to continue or F1 to enter setup”.
If I connect the power supply unit instead of the battery, a USB meter shows the usual fluctuating power consumption for approx. 30 seconds, then the mainboard switches off...

Info for error 2202 LenovoThinkPad models and type

Extract from ThinkPad Maintenance Utilities Configuration File
plnsrv.ini Version 1.01


Some information that may be useful




There must also be missing models, add them to the list if you know of any.

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This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...

This specification for the Lenovo ThinkPad T490s Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the T490s boardview and T490s schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for Lenovo ThinkPad...