These instructions are what I use for a B10
A not a B10D so I’m hoping that things are the same.
* Set your own machine’s IP address to say 192.168.1.
99 / 255.255.255.0 / gateway 192.168.1.1
* Plug ethernet cable into modem’s port 2 or 3 and into your machine (or via switch)
* Power the modem off
* Insert a pokey implement into the modem’s reset hole to depress the switch (there is a similarly sized but protruding WPS)
* Power modem on, keeping poker poked in all the time still
* Keeping poker in, LED will flash for 20s then go solid red
* Release poker
* If the device is left in the solid red light mode then a recovery page should appear at
http://192.168.1.1, but only if the ethernet cable is connected to port 2 or 3. Port 1 or is it 4 -which is it -will not work, depending on which way you read the port numbering. (I think the port on the far right is the bad one.)
You get a ‘load firmware’ prompt on a recovery page on a B10
A.
If that doesn’t work, try
Andrews and Arnold’s B10D reset instructions - the factory reset section, not the first section because the standard reset just resets back to the ISP’s defaults, not ZyXEL’s.
Edit: doh. I’ve just noticed an earlier poster posted the same link. What hushcoden said.