BAT Blinking blue LED

I have just noticed that the front blue LED on my left BAT VK150SE amp is blinking. All 4 green LED's are turned on and the amp is working. Anybody knows if this blinking LED denotes a serious problem? Should I turn off the power and send it to service? Please help!
I had the same thing & BAT sent me a replacment bulb. Very simply to install, but I haven't gotten around to it yet, so I can't say for sure that it will solve the problem.
Thank you for the reply. It is good to know that it does not affect the operating condition of the amp.