Urgent WL Caprice Starting Issue

[Laurence-d]

Hey guys,

Have a 2005 WL Caprice, Black with Beige leather with a really frustrating starting problem.
The car doesn't seem to want to recognise that the key has been inserted in the car, when you turn the key to the point just before starting to get all the electrics and warning lights etc. well this doesn't always happen, turn the key and the dash stays dark, no lights, nothing. Then sometimes when it does decide to work, as soon as you move the gear selector, the car dies, everything goes off, and its back from scratch.
It used to be that if the car was in sunlight or it had just been driven the problem was very rare, or if it was cold and raining then getting the car started would sometimes take 10 minutes.
But now no matter how hot it is or even if you just drove it 5 minutes ago, the problem is worse than ever.
I've had the car to various auto electricians, none of them have a clue, I've had a Holden dealership run all their computer tests and nothing comes up.

It's a real shame because once it gets going it really is a fantastic car, any tips or suggestions would be greatly appreciated, will try anything!

Cheers,

[accentstencil]

Just a guess but maybe a dodgy ignition switch.