My phone screen is black, but I can still hear notifications

Hi,

As a DIY repair all you can do is to open the phone and check if the display flex cable is securely connected to the systemboard and if so then to temporarily replace the display to prove whether the problem is in the display or the systemboard.

Here’s a video that shows how to replace the display in the phone which may help.

Replacement displays are available online. Just search for Galaxy A71 LCD display replacement to find suppliers that suit you best.

If doing this yourself seems too daunting, contact a reputable, professional mobile phone repair service and ask for a quote