I had this unit in the shop and the left touch pad button was broken off. I originally inspected it and found that I’d have to order the entire touch pad assembly in order to fix just that broken key. I went through with the order and received the part today. I removed everything and was in the process of putting everything back onto the new upper portion of the bottom half. Come to find out, there is an actual PC board under the touch pad buttons and that part was also broken off. So, if you plan on fixing a 1905 Satellite’s touch pad due to any broken buttons, make sure you inspect underneath (if you can’t view it from the top you’re going to have to take it apart), to make sure that the PC board underneath is still intact. This would have saved me a ton of time and a ton of money.