I have a 2860n+ which has been working well for many months. Yesterday the 2.4GHz wireless kept dropping out. I've tried uploading the 3.7.8.3 again. Resetting to factory defaults none of which helps. Today the 2.4GHz is not visible at all (the 5GHz works fine). Is it possible for there to be a hardware fault on 2.4GHz but not on 5GHz?

Is there anything else I can try?

Andrew