We had a similar situation where we were integrating a GPS unit and were plugging in the GPS output to the console port of the RB532. Both the Red and Blue LED's would stay lit and we were unable to log into the Router while this console cable was plugged in. It turned out that the GPS module was outputing information to the console port causing the Router to go into the BIOS set up. We resolved this by going into the BIOS set up and changing the keystoke required to access the BIOS while booting. We changed it from "any key" to "delete" key. Now when the Router boots up, it ignores all the GPS output to the console port and allows the Router to boot up.