Why dose my Samsung Galaxy Tab Pro keeps turning the wifi off.

When I power on my Samsung Galaxy Tab Pro the wifi does not stay on so I have to turn it on manually but it struggles to turn on and actually does not turn on its lights up light green not dark green like when it's indicating that it is on. So basically I think there something wrong with the wifi card on the receiver or something with wifi related things. But I don't want to damage it while opening it and it tends to heat up faster on the right top corner around there it heats up way too fast and seems like it could burn my hand in under some time like about 30 sec or so. And it is fully operational just the wifi does not turn on.