Bump! Does anyone have an idea?
Clean the card so that it is free of any dust while inspecting for any noticeable damage like missing components or burn marks. Also cleaning the slot connector wouldn't be to bad of an idea at this point. Make sure that the monitor cable doesn't have any bent pins or corrosion. Check the psu for signs of failure like brown or black spots on the pcb near the mosfets and diodes. Then try again, if nothing helps at this point you will need to get a replacement.