Dismantled after "Zoom Error" and now it won't power up.

I got the dreaded "Zoom Error" after a weekend at the sand dunes... I tried the "telephone trick" but it didn't make a difference. Last night I **carefully** took everything apart and cleaned the sand off, but when I put it all back together, the camera was completely dead. I double checked that all the circuit boards and bands were connected, and put fresh batteries in, but still nothing. I'm wondering if this is really the end... any tips would be greatly appreciated! Thank you!

Kathleen