Yaesu ft-920 dsp blinks== 3b9fr

hi all radio friends,
i have received new ribbons for my ft920 , it been fixed.
the result is good and bad. the band changes now but dsp blinks
and there is no incomimgs signals , audio is quiet. all that as the dsp
does not screw. if i screw the dsp to its place , no band change,
can anyone help me to get through with.
if possible better email me at r.gerardfelicite@ymail.com.
thanking anyone. 73 robert,3b9fr