Hope there is a solution to this.
My DFP died while playing GT5, force feedback just stopped all of a sudden, no response from understeer or oversteer at all. 
Thought  it'd be a simple error, so I unplugged, and plugged it back in, only to  have the DFP have a flashing green light on the left side of the wheel.  
Has anyone else had this problem at all, and know how to overcome it?
I googled for answers, but to no success. Most solutions were based for when using it for PC instead of PS3.