Home button repair via LCD?

Hi,

Upon changing the battery within my iPhone 7 the home button does not function at all.

Reading online, it said that the most likely issue was due to ripping the home button flex cable, therefore, I ordered a replacement home button to return the functions (apart from Touch ID).

The replacement part when fitted also did not work! Therefore, I am thinking that the issue is not with the button but with the LCD flex cable. Has anyone else had the same issue?

I think my best bet is to order a replacement LCD and test that with the original home button? Anyone else agree?

Thanks