Touchscreen not working on HP Elitebook 845 G8
I recently bought an elitebook 845 g8 from a seller.
When I went to buy it, the 845 g8 had a non-touch panel and its plastic bezels were peeling. I pointed it to the seller and he told that he can change the whole top lid with some other similar unit.
There weren't any other better one's, so I took an elitebook 840 g7 which had an i7 10th gen and he swapped the whole top lid with the screen.
Later when I paid for it and all, did he spot that he had mistakenly replaced the lid with a touchscreen one from the 840 g7.
But the touchscreen isn't working on this panel now installed on my 845 g8. Display works alright otherwise.
Is it something hardware related or maybe a BIOS block?