Sadly, I experienced the "orange LED" issue as well after a bad flash, and it most likely means that your router needs to be reflashed directly.

I would recommend that you pick up a USB-TTL cable and debrick it using this tutorial:
http://www.myopenrouter.com/article/13859/How-To-Debrick-Your-NETGEAR-WNR3500L-U

If you're going to be doing a lot of tinkering with the router, you really do need to get the cable and will find that you will use it often, especially if you're switching firmwares often or want to stay on the bleeding edge of firmware updates.

Peter Redmer
Administrator
Blog | Twitter

Hi sirs,

I have the same problem in my netgear router, only orange led is turned on.. it seems like the router is .... let me see.. bricked :D ( ok not funny :( ).

This problem occurred from a sadly action... i have an external usb hard drive mounted for torrent proposes, but in that moment i was forced to remove it (I did a reboot previously to stop all running process). But the router never worked since that beautiful day.

For that reason i googled about this and i found the pretty nice "How-To-Debrick-Your-NETGEAR-WNR3500L-U" by Peter Redmer. But now i have another kind of problem... i opened my router and I've got a terrific surprise...

The board doesn't has the 6 pins to connect USB-TTL cable... the pins place is there but just only impressed in the board (the JP1 pin place is only a hole in circuit board :S).

What else i can do to debrick my router? Any ideia?
Best regards,
David

Hi,

I can say for sure that this issue happen if you enable Sshd in DD-WRT. The router is NOT bricked. It looks like that it runs in a reboot loop. This issue is known in the dd-wrt forum.
You need to do a 30-30-30 reset. It works for me.