Why are my wifi and bluetooth not functioning?

My tablet worked beautifully until a couple of nights ago when it stopped being able to detect wifi networks or paired devices. Is this a hardware issue? How can I solve this?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1

crwdns2944067:02crwdne2944067:0:

Does WiFi icon disabled (gray color ) or Cannot switch on? or able to switch on but signal coverage not visible ?

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

Icons greyed out, but wifi and bluetooth can be switched on. But no networks or paired devices are recognized. This is apparently a known issue having to do with the wireless hardware and Amazon has decided to send me a replacement.

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0