Ipad screen blank hard reset fail. Doesn’t appear on computer. help!

My son’s iPad won’t respond. I tried the hard reset and also connecting to a computer but it doesn’t appear on the computer. If plugged into a charger it is drawing about 5 watts and I can hear very quiet static if I put my ear up to the speakers. It’s always lived in a case and he is very careful with it so no clue what happened

many suggestions would really be appreciated!