I've had a Buffalo WZR-600dhp that I've used OpenWRT on for years. No problems with it. Recently I thought I should have a spare that I could keep configured for a quick replacement if needed. Since this model is no longer made, off to eBay I went and found one in original packaging that was basically new.
Once I got it powered up and connected to it, I found that it has DD-WRT firmware that is branded with IDEXX (actually this is supported directly in the DD-WRT repository I found). No problem, thought I, I'll just upload OpenWRT and be up and running. No such luck.
Whatever image I try from the Web interface--OpenWRT or DD-WRT factory version--the router always reboots back into the IDEXX image. I tried the tftp image but always got a transfer timed out error. I tried 192.168.11.1 and 192.168.222.1 as tftp host addresses, the latter being the default address of the IDEXX image, but neither worked.
As a result I'm stuck. I know the hardware will work with OpenWRT but the current DD-WRT won't allow flashing in another image. What is my next step, if any?