How to troubleshoot wifi devices that stop providing a signal

Dawn Spiegl
Dawn Spiegl used Ask the Experts™
on
I have 15 Dlink DAP-2590's in our building - most of which work flawlessly.   I have 1 hallway however where they (2 of them) stop providing a signal periodically, bi-weekly or monthly.  This has been happening since they were newly installed.  I thought for a good while that it was signal conflict with each other - I put them on different channels, I moved them further apart, and finally I have turned 1 of them off and then the other but the problem remains even when there is only 1 of them and no other wifi within 300 feet.

I can see the ssid even when it isn't providing signal and restarting the wifi from the gui interface always solves the problem for awhile.

What troubleshooting can I do to solve this issue?  I hesitate to replace the wifi unit because it happens to 2 of them and surely the odds are not in favor of that being the issue.   I suspect some other interference but there are no other odd electronic devices in that hallway - no different than any other hallway.  There is 1 macbook air in the area...can a laptop cause interference for a wifi device?
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Business Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018
Commented:
Try inSSIDer by Metageek   http://www.inssider.com/

I use this and it tells me the strength of the various signals around me. There in inSSIDer and inSSider Office (more expensive) which may be better for you.
JohnBusiness Consultant (Owner)
Most Valuable Expert 2012
Expert of the Year 2018

Commented:
@DSpiegl  - Thanks and I was happy to help.

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