Why the internet light in modem becomes red?

[jraju]

Hi, My internet light occasionally becomes red if i log on to pc , after getting wifi access thro smart phone. When i am using the log on to internet access with wifi , thro the wifi modem and then power on the pc, i get my internet light red. If i use flushdns command of ipconfig then it is becoming green.
                    I know that i could access the wifi in mobile only thro the modem. If i log on to pc, after that, occasionally the internet light becomes red.
                   Wifi access is entirely different and bb access is entirely different. Is it correct? Why this is so? what is the fix

[Boggin]

It's possible that it could be a DHCP IP address conflict or if you have an extremely poor broadband speed that the act of switching on your pc could be temporarily maxing out the bandwidth.

Wire up your desktop pc before switching it on and then note what your Internet light does.