What does the indicator light on ADSL MODEM mean?
If the indicator light is bright, which means that the device failed to pass the self-test, you can try to reopen the ADSL or reset the device to solve the problem.
This indicator usually blinks only when the ADSL is turned on. Once the device is completed, the indicator goes out.
If the Power light doesn't turn on, it's clear that there's something wrong with the power.
Generally, there are Power lights, Test (or Diag) lights, CD (or Link) lights, LAN lights, these lights on the ADSL modem indicator lights, and these lights on the ADSL modem indicator lights all have different instructions: