Nissan: '90 Nissan Pulsar Main switch panel

Hi, We have a 1990 Nissan Pulsar X1R.

We recently had a Uniden alarm installed, and when it came back from the
installation, the main window swich panel was faulty. The top door lock
switch works, but the window switches (3 + window lock) work only
intermitently. It's not dirty connections or anything, when they stop they
all stop including the switch on the passenger side.

I've had the installation people up about it, they claim it's not thier
fault, but I don't want to get into that now. The guy claims his auto
electrician said that the switch circuit board in Pulsars "just die
sometimes".

Is it possible that this unit just failed as he said? Is there a history of
these units dying?

Thanks

Luke Pascoe.
luke at pascoe.net dot nz

P.S. As an aside, We're the proud owners of two Nissans, the Pulsar and a
'93 Primera. I aspire to one day also own a restored '74 240z, damn those
things are sexy :-)