If your AT&T broadband light has suddenly started flashing green then red and you’re not sure what to do, fear not, for we have you covered. You must troubleshoot each possibility to find out which is yours. It could be the result of anything from your modem malfunctioning to unplugged or damaged cables. Generally, your AT&T broadband light will flash green then red when there’s a connectivity problem. What would cause the broadband to blink like that and why isn’t it working properly? So you were trying to use your AT&T Broadband when it stopped working and a light flashed green then red.
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