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Released by Motorola in November 2004, this stand-alone cable modem allows the user to connect to the internet using ethernet or USB. It features a front panel of indicator LED lights and a standby button on the top of the device.

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Why are all LEDs flashing?

All LEDs are flashing on my modem and modem does not work. Is there a repair procedure?

Répondre à cette question J'ai le même problème

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I had 2 problems with this modem (SBG6580). Initially it would turn on and all lights would be on and it wouldn't boot. Then a day later the modem lights would blink every other second. I finally found that the problem was the power supply. Replaced it with a new 12v (1.5a) power supply and havent had any issues. Good luck!

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Hurray, same problem, same fix!

Thanks! David


Brand new MB8611 showed same symptoms, top four LEDs flashing, LAN LED off despite being connected to router. Swapped in a good 12V power supply and everything started working. Big thanks!


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Maybe you need to run a router-reset or just a simple edit on the router's page.

for a quick solution...

Depending on the model, usually you should follow some basic steps:


Turn off the router.


a. Check for the reset button;

b. Use a bobby-pin or a matchstick and keep it press

3. Power the router while keeping the reset button pressed (5-10 seconds depending on the manufacturer).

4. All the led's should light up and stay lit; after 5-10 seconds, after releasing the reset you should have a factory reset router.


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Check that the power supply delivers 12v under load.

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