I watch my B5 and turn it off, I turn it on 2 days after and the blue light comes on but no signal display on the tv the tv is showing no signal i try more than one hdmi cables and still no signal on the tv and it is connect to the correct source mode i also have a friend who is having the same issue with a same B5 model any help would be appreciated. 

I'm assuming you have unplugged the power on the  unit for a few seconds and then tried to plug it back in ?

Just as a test, have you tried plugging it into a different TV/Display ?    If you have a computer monitor that has an HDMI input, maybe as  test just try to plug it into that.