dream box and d box probloms

Hi all
I have been given 3 boxes which will not pick up any chanels in fact they seem to be frozon or bricked. this is what im getting

1st dream box dm 500-c I get a signal to the tv but no channels work

2nd sagem d box get no signal at the tv at all and the display has lines through it

3rd nokia d box this also has no signal at the tv and has lines through the display

I have only ever flashed starview boxes and never had any concerns with them but dont know the first thing about these other boxes im hoping someone can point me in the right direction for the files to fix them or info on what is up wiyh them
Thanks in advance Bri