All I get is the hp invent black screen. computer

Try flipping it over, unscrewing the back panels and pop them off. Take out 1 stick of memory if there is 2, or take all memory out. Then try to turn it on. It will either do nothing but turn on and beep, or it will turn on but show nothing on the screen. Then shut it off and put the memory back in. Sometimes this kind of reset gets past that bios screen. Otherwise your memory may be bad. The other culprit can be the battery. Try removing the battery and starting it with it plugged into the wall. Let me know if this fixes your issue.