Arduino Uno board showing red ON

Why does it show a red ON and the LED blinks red.

I checked the following: 1.Tools-Board (set to UNO) 2.Serial port 3.Programmer

If i burn the bootloader, it gives an error each time.

PLease help. It was working fine for Arduino Due board that i was using previously.

Any help would be appreciated. Thanks

What is it that you're trying to do? What error messages?

Red LEDs is usually a sign of a counterfeit board.

Other than that it's not possible to tell what you're doing wrong unless you share some more information with us. Sounds like you're trying to burn a bootloader but I'm not sure and we can't see what programmer you're using and we can't see the error meesages from here.

tashing:
Why does it show a red ON and the LED blinks red.

Official boards do not have red LEDs. (Or any ability to “show red.”) Cheap counterfeit boards are, well, so cheap they use red LEDs since they are the cheapest. ($0.0001 vs $0.000125 king of savings)

tashing:
PLease help.

Contact the person / company you bought the board from. Perhaps by using cheaper quality components and manufacturing processes they are able to provide personalized technical support instead.

tashing:
It was working fine for Arduino Due board that i was using previously.

Due or Duemilanove? They are completely different.