On Acer Aspire, you can't use F3 to activate the coords of the player due to F3 turning up the brightness, this happens on every single minecraft version and every single bedrock version of Minecraft (as of right now)
MC-233726
Acer Aspire Minecraft Java Glitch
Resolved
Invalid
0
This isn't a Minecraft bug, rather a keybind on the Acer Aspire. Try holding FN when pressing it, or find a way to change that key to not change brightness.