Some of you might remember the T540p I got for free from work a couple of years back - after its mainboard died I rebuilt my older personal T540p with the the remaining good components and a donor W541 I bought on eBay.
I'm quite pleased with the result. Its revised specs are: i7 4930MX, Quadro K2100M, 32GB DDR3L RAM, AUO B156HAN01.2, an HP Blu-Ray drive and an Intel AX210 WIFI card.
And a few stickers obviously.

Were you able to use the same fan from the t540p motherboard on the W541 or did it come with a fan? Also where is the battery from? mine came with a 6 cell and not a 9 cell
The mainboard came from a complete system that was in not so good condition, but it came with the fitting heatsink. I bought the 9 cell battery as new old stock on ebay a year or so ago.