I have no power steering at all after my car sat a couple days, with no prior problems from the steering. Does this suggest a bad pump. The fluid did not look very clear so I'm wondering if it need just a good cleaning. I own a 96 LS400.

 

There's some good reading on the power steering system and its usual faults here:
https://www.clublexus.com/forums/ls4...ing-bible.html

The sticky at the top of this forum page has a great deal of good links like this one, with all sorts of information. So I'd suggest taking a look there first if any other problems pop up.