Yep, with regards to the warning lights plugging in for diagnostics should pull up an error code hopefully. Normally the dynamic steering light simply indicated a fault with the steering system which is a bit vague.
With regards to the blind, I believe they are one complete unit. However, I have heard storied of guys gently prying them up whilst someone presses the button and then greasing them as sometimes a clicking will indicate there is power to the motor but something is stuck.
Let us know how you get on