wifi suddenly 'not in range'

[Kilroyquasar]

hello!

my home-network wifi was working well till late last night. downloaded the Win 10 iso using it on my laptop. morning i noticed that the wifi wasn't working (though download had thankfully completed). neither my laptop, nor phone and tab are connecting. desktop is connected through ethernet and is connected fine.

mobile and tab are not able to locate the SSID. if i make them 'forget the network' and again set it up, they show the error 'not in range'. hadn't made any changes to the connection-configuration last night. the issue greeted me in the morning.

the router is tp-lin wdr3600, running on ddwrt. have 2 connections - an MTNL one and other is a cable-net connection (HNS). same condition on both. SSID-name and broadcast still as before on the router set-up page. the LAN-page shows only my desktop under active-clients. MAC IDs of wireless-clients are fed in the 'MAC filter' list (allowing only them to connect to the network). disabling it was of no use. tried changing the channel too. no use.

any suggestions to troubleshoot it?

TIA!

 

[onlyravi]

No harm is backing up the settings and doing a full reset to factory.

 

[Kilroyquasar]

thanks! but perhaps not needed. i just disabled the wireless security, and the phone and tab immediately identified the SSID and connected to it, while the laptop took a bit longer. the security was set to 'WPA2 Personal Mixed' (TKIP+AES) earlier. never gave any problem. don't know what happened all of a sudden. interference? but why the 'security' took a hit? will try with some other security-setting and see what happens.[DOUBLEPOST=1439298085][/DOUBLEPOST]changed the earlier security-configuration to WPA2-Personal and AES, as well as changed the SSID too, but to no avail. neither laptop would find the network, nor ph and tab are connecting. only by disabling the security they are connecting. anybody else faced a similar issue ever? want to explore more options before deciding for a reset or firmware-upgrade.[DOUBLEPOST=1439324401][/DOUBLEPOST]UPDATE: successfully upgraded the firmware of my router (from r22118 to r27506). re-configured it, and wifi is working again!
will re-install transmission, samba, mini-dlna, etc. tomorrow.
it anyway looked like a full nvram issue (it was actually full, as seen from the sys-info on router-page); simple cleaning of it using SSH could've resolved the problem, but FW-upgrade too was pending since a long time, so finally took that route.