Power Led - ZyXEL Communications VMG4005-B50B Overview Manual

Power LED

Problem: The POWER LED turns solid red.
Solution: A blinking red LED can indicate a firmware upgrade, but a
solid red LED can indicated a firmware upgrade failure. Try restarting
the device. If the LED still turns solid red, try replacing the power
supply or making sure the device is using the correct power supply;
otherwise, the router will need to be replaced.
Problem: The POWER LED does not stop blinking.
Solution: The unit only takes approximately 45 - 60 seconds to boot up,
during which the POWER light will blink green. After boot up, the
POWER light should turn solid green. If this does not occur, it could
mean the firmware on the unit has been corrupted, and the unit will
need to be replaced so it can be repaired at the plant or factory.
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