Google search brings me this Ebay listing

Screen Display Cable IR For Lenovo ThinkPad E15 Gen 2 5C10Z23841 DC02C00LD00

According to part number, that cable is for the AMD version...

You got the wrong cable, you need to get one suitable for type 20TD that would be:
5C10Z23917

(Image taken from Lenovo parts site, cropped the relevant portion)
It says "GE5B0 EDP CABLE IR INTEL DC02C00MF10"
Perhaps the IR means for an IR camera? (As in, for face id/windows hello)
The other cable 5C10Z23918 I guess is for a regular...

I checked again the Lenovo parts website, and got this

https://pcsupport.lenovo.com/us/en/p...isplay/buy-now

Search for "edp" and I get 3 different cables for type 20TD (Intel)

CABLE FRU CABLE EDP CABLE RGB
Part No: 5C10Z23918

FRU CABLE EDP CABLE RGB TOUCH
Part No: 5C10Z23919

Mars1.0INTELFRUCABLEMars1.0IntelEDPCABLEIR
Part No: 5C10Z23917

The one with "touch" looks like it's for a laptop...

There's 2 versions of the E15 gen2

According to Lenovo parts search

https://pcsupport.lenovo.com/us/en/p...isplay/buy-now

The models with Intel CPU (the one you have) (Type 20TD/20TE) uses display cable FRU: 5C10Z23917

The models with AMD CPU (type 20T8, 20T9) use a different display cable FRU: 5C10Z23842

They're not interchangeable, and that could explain it
I checked the schematics for NM-C771 (E15 gen2 AMD) and the pin out of the...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...

This specification for the Lenovo ThinkPad E15 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 E15 boardview and E15 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 E15...