You have damaged the flex cable for the Touch ID sensor or have damaged the connector on the board. Replace the connector and tell us whether it works or not.
Give us the Model Number and everything on the back of the stand. Update (04/03/2018): If your ports are horizontal in a straight line,you have an iMac Early/Mid/Late 2006. Otherwise if they are in a vertical line,you have an iMac G5.
I'm really,REALLY not very sure about my answer,use it at your own risk. I think that the screw sizes are the same where the display is. No idea about other internals :P Sorry if i'm wasting your time :(
Maybe there is one on AliExpress or eBay. Update (03/17/2018): https://www.aliexpress.com/item/Original-New-Top-down-lcd-screen-for-New-2DS-XL-replacement-display-for-NEW2DSXL/32856655318.html?spm=2114.searc...-7359-42da-9a50-ab09184f7149-2&algo_pvid=b18bebd1-7359-42da-9a50-ab09184f7149&transAbTest=ae803_4&priceBe... Here is a link to it. Have fun replacing that 2DS XL screen and i hope it will be back up and running in no time! https://www.ebay.com/itm/Original-Nintendo-2DS-XL-Top-LCD-Screen-Face-Plate-Lens-Replacement-Part/222833655748?hash=item33e1ebbfc4:g:... Here is one on eBay if you can't order from AliExpress. I recommend buying from this one,because the seller on AliExpress does not have any feedback.