New
#11
http://wiki.openwrt.org/doc/howto/generic.failsafe On some routers (e.g. TP-LINK models), OpenWrt will start to blink a LED (e.g. the "SYS" LED) on the front of the router when it is in its early boot cycle. The blink rate is about twice a second. Looking for a blink pattern is much more convenient to use instead of having to use a packet sniffer.
Power on the router
As soon as this blink pattern is seen, press the hardware button the front of the router
The SYS LED will change to faster blink pattern, indicating the router is now in failsafe mode
should be your wifi one i'd imagine.