Land Rover Repair: 96 Range Rover EAS fault, airsprings, solenoid

Question
Hello, I have a 96 Range Rover 4.0 SE, the EAS Fault came on the dash and the truck just went down on it's own. So I read this site and manually raise the truck and see which solenoid was bad, the truck raises up and down on all solenoid. Just as I let it sit for 3 hours the back RR started to go down and then the LR went down also. I hear a hissing sound up front by the solenoid but being deaf in my right ear I cannot tell where it is coming from. Do you think the solenoid is bad and the EAS/ECU box? Where should I go from here?  Thank you so much for your time and effort.

Answer
Hi Derrek,

The solenoids are sealed with orings, a valve block rebuild will cure your leaks as long as that's the only issue.  your '96 is about due for new airsprings as well but replacing the orings is an inexpensive first step:

http://www.rover-renovations.com/ProductDetails.asp?ProductCode=RVH100030-K