Question about Linksys BEFSR41 Cable/DSL Router W/4 Port Switch, Retail Box (DSLSBEFSR41)

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NIC blinks on then off for longer run lines

I'm in Iraq, trying to set up a VSAT network for a group of soldiers. I have the sat system working fine. I ran cat5e to several locations, when I hook up any location farther than 40 feet from the switch, the lights on their NIC card and on the switch will blink on then off very slowly. The computer on other end will flash the notification that a network cable is unplugged. Is this my cable? I have tested the cable with a pin tester that cycles through all 8 pins on both ends to confirm you attached rj45 properly, according to this I get signal through the wire, it just might not be strong enough or maybe there's interference. This has happened with five different cables. I'm using cat5e utp Have 2 computers on this router. Windows xp on both. Keep receiving this message on only 1 computer, other one is fine. Switched cables & ports on both computers, but still getting same message on this 1 computer. Also using Lynksys modem & tried connecting directly from modem to computer but still got this "unplugged" message. Also tried new NIC card, but made no difference. Sometimes lights on router are on long enough to make the online connection, but sometimes it just blinks on & off too fast so I can't get online. This problem started approx 6 months ago with the "network cable is unplugged" message only showing intermittently. Now it's constant. Any ideas what could have caused this & most importantly, how do I fix it? It's driving me crazy.

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You need to update the firmware of the router then hard reset it.

Download the router's firmware at

After updating the firmware, you need to hard reset the router.

Press the reset button at the back of the router for 30 seconds then unplug the power for 30 secs then plug it back in. That should fix it.

Posted on Aug 08, 2008


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