[iBook] Yet another problem...

[Pat]

You guys are so good and helpful, but I now have a real serious 
problem.  My TiBook 400 simply won't boot at all!  I was going to move 
some programs from it to my friend's and I haven't booted it in a 
couple of months and now, I hit the start button and nothing happens at 
all.  What does this mean?  I've checked the plugs, the wall plug, etc. 
but I've never had it not respond at all.

HELP!  It's my oldest and most dear one and what could be the problem?

Pat