I had a Linksys WRT54GS v.6 that had a Sprint Airave hooked up to it. We started having problems with the Airave being unable to connect and stay connected and since the router was about 2-3 years old we thought it was going bad. So I recently bought a new Linksys router WRT120N and initially after hooking my Sprint Airave up it worked for a brief period (less than a day) and has gone right back to not working, specifically the system light either stays solid red or blinks red while the GPS & WAN lights all stay blue. After a couple weeks of troubleshooting with Sprint they sent me a replacement Airave. I initially hooked it up and within 30 minutes all lights were blue and within 2 hours the System light was back to flashing red or solid red. I believe we've ruled out faulty Airave equipment which leads me to try and troubleshoot the router. Any suggestions?
Interestingly enough the same day that I posted that message I had completed a firmware upgrade to my router. This seemed to resolve the problem for several days until last night and we are back to square one. The power cycling tried/failed. Next?