I went to a local repair shop to show them the problem. The technician pushed the buttons, and felt that he was 95% sure that it was MOST LIKELY the master pod.
Wanting to get a confirmation, I went to the Lexus dealer to show them the problem, they had a technician come out, pushed all the power window buttons, and said that it was very UNLIKELY to be the master pod since it was able to control all the windows fine. They said they would need to look at wiring diagrams and do a electrical diagnosis (minimum cost of 2hr labor) to find out what the problem is. I told them I'd get back to them about setting up an appointment.
Well, a new master switch is ~$300 at the dealer. I went to www.car-parts.com
and located a salavged one for $55 shipped, so I ordered it. I figured that's a good gamble for $55 vs. $200 diagnosis +$300 part at the dealer if they end up with the same diagnosis.
Anyway, I installed the salvaged master power window switch pod, and WOOHOO!! all the switches worked perfectly!!
Just thought I share the story with y'all... Makes me wonder about the competence of the technician at that dealer...