Hi ,
Long time user of FF800 today it won't start. It's been 2 month now since it needeed couple minutes to start , until that all the leds were flashing. Since i'm far away for a repair centre (i'm in mauritius), i can't afford to send it back to europe for repair.
I just read on this forum that the problem was surely faulty condenser. 
So i opened my F800 and look at the power supply part. They were 3 condenser (470 uF 25V) wich were bent , inflated ... So i just bought 3 condenser of this type and changed them all , carefully respected polarity and used a thin solder iron. Now my Fireface start immediately and works perfectly. For all who have an old fireface with this problem without an easy access to repair center here is your solution.

Jonathan