Blank screens after drops are common after a pretty hefty drop.
Are you noticing anything vibrations when turning on the device? If so, it could mean that your LCD is just damaged and needs to be replaced. You could also attempt to see if there are any cracks behind the glass with good lighting.
If you’re able to get another LCD that would be a way to determine it. The other test is if you have another A5 you can swap your board over to make sure it isn’t board damage related. This is just to knock out any other issues with the device.
Good luck