Today I got a special task. Jason told me to remove the mainboard from a IBM Thinkpad R40 and put it into another one. So I had 2 laptops one with a not working display and one bigger laptop with a not working mainboad. The easier way when they would be the same is to exchange the display but that wasn’t the case. Here we go I thought and so I started to take apart the smaller laptop with the not working screen. After a while I decided to search for the service manual to be a bit faster and yes I was faster then. I took the motherboad out of the unit and started with the 2nd laptop. This time without the manual. After nearly 10 minutes I got the motherboard from that laptop. I compared both motherboards and noticed that the one from the bigger laptop has a longer wifi-card slot as the one from the smaller laptop. So I exchanged the wifi-card slot from the motherboards. Afterwards I put all together and checked if the „new“ laptop is working. It got power, it booted, it started windows and here is a working IBM Thinkpad R40.