macbook 2016 with high sierra
two major issues:
1. bluetooth can't identify devices
2. wifi can't connect automatically on 2.4g, but 5g is working fine.
anyone could help?
MacBook, macOS High Sierra (10.13.3)
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Best reply
To eliminate hardware You can try AHT/Diagnostic http://support.apple.com/kb/HT1509 Not definitive by any means, but may kick out an error code.
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test :
Genius reservation http://www.apple.com/retail/geniusbar/
on-line https://getsupport.apple.com/GetproductgroupList.action
check warranty https://checkcoverage.apple.com/