Hi, I'm trying to restore OEM FW after installing OpenWRT. OpenWRT boots and appears to work (gets an IP address through, DHCP, starts talking to NTP servers and so on) but I can't connect to it to configure, as all five interfaces appear to be just one logical interface (they all talk on VLAN 2 and they all use the same IP) and it seems this logical interface is the WAN interface, where OpenWRT isn't listening on any ports so I can't connect with http/https/ssh/telnet etc..
If I understand correctly the Emergency Recovery Mode should be available even after flashing 3rd party FWs, as it was an OpenWRT webpage that tipped me off to the possibility to unbrick a D-Link router using that method.
I've tried following the 11 steps (except steps 1 and 9-11) under the heading "Procedure for DIR series routers" in the post you're linking, both verbatim and with a few changes. Besides verbatim I have for instance:
* connected to the WAN port in step 2
* tried 192.168.0.5 and 192.168.0.10 in step 3
* only unplugged the router without first powering down in step 4
* in step 6 I've both released the reset button directly after the power led turns amber, released it after about 5 seconds, 10 seconds, and I've also not released it but tried connecting with the reset button held
* I've scanned the entire 192.168.0.0/24 range to try to find any open port on any IP in that range (in step 7)
* I've tried repeatedly forr several minutes in step 8, even though it really shouldn't take more that 10-20 seconds (if even that) for the router to boot and start serving that page
All in all I don't know how many times I've tried most of the combinations of the above variations of the instructions, without success.
I have also tried to ping the router, but it doesn't reply (no arp requests ever gets a response, regardless if it's for pinging or connecting to port 80).