Front camera and ear speaker not working

Hi,

I have replaced a screen on an iPhone 6+.

The phone was quite badly bent and it needed a new proximity sensor, home button flex and screen.

After the replacement the front car and ear speaker no longer work?

I've replaced the proximity sensor flex twice thinking it may have been a tear in the cable or a bad replacement proximity sensor / front camera part, but it still doesn't work.

It has me thinking could this be damage to the board due to the phone being badly bent?

Any suggestions / advice would be greatly appreciated.

Thanks in advance