iPhone 5 ringer not working even after replaced

hi there I have in the hand an iPhone 5 which loudspeaker is not working at all even after I replaced it with multiple ones and also I replaced the charging flex cable with no hope

but everything else is working very well such as the earpiece, microphone, Headphone Jack all of them is working very good only the ringer is not working

also I realised that the phone is struggling to set the time and date automatically

so is there any help That you can provide I will be so Thankful