There may or may not be a "component list" as you've described for public consumption. However, if you need the mainboard replaced, you should replace the board - not try to unsolder and add a replacement IC.
Not sure what number of layers a ThinkPad logicboard uses for its PCB, but removing a chip and replacing it when it's not socket-based is generally not possible as it's been sodlered at multiple levels to correctly speak to different areas of the PCB.
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Additionally, you'd have to trace down the "why" of the burned IC. If it's not something simple like the just that IC, the battery or power supply itself, you could be replacing it multiple times in the attempt to isolate what component failure is the root cause. ICs don't normally fail in this manner, typically it's another failed component elsewhere that cooked it.