said by Chuckdez :
Your shooting at the stars with these claims.
Thank you. I really appreciate that.
I am shooting at stars in debugging your device -- I have no earthly idea. Hardware fails. These devices have a 1 year warranty. Call Technical Support, get an RMA. HTH. Yours seems like it's failed radio hardware.
Why leaving the password blank fixes anything is beyond my understanding.
I'm not shooting at stars as to Radar or stuck-open xmitters. I've seen the code for other Wi-Fi devices. I know that the DIR-655 has the AR5008E-3NX chipset and complies with 802.11h which does -- wait for it -- radar avoidance.
Again, I'm not saying your issue radar, or that radar is used on those frequencies in your area -- radar detection can be tripped by a hung computer near you with a software wi-fi stack -- putting out a dead carrier. It could be non-wifi in source -- these are shared. But it could be the radar-avoidance code being triggered by receiving a dead carrier or failed hardware.
I don't know if the DIR-655 reboots to implement channel-changing (I agree with you that that it shouldn't have to). I do know that previous D-Link AP products (such as the DI-500/600/700 family) did reboot the unit in hopes that the random channel selection would pick a clearer one upon restart.