MantaB--Sure a setting could have changed, have you dug out the manual to figure out if this is the case? First I'd press the flash control in back and make sure it is set to force flash (as opposed to auto or no flash--should be the center symbol). Next make sure you are in a mode that uses the flash (ie--not in movie mode etc.) There could be a few other weird things I suppose but basically if you have it setup to use like you would normally use it and get no flash you have to suspect post-flood damage.
cheers for that, im posting as its my otherhalfs camera and wouldnt know bout the manual as hes not printed it off,

[sorry col] and ive not got time to shift thro it on the pc. he had already done all of the above and it has certainly been on forced and the right settings, suppose was hoping someone tell us bout a tiny little button weve not seen

so looks like what we expected flood. hes talking bout getting a replacement altho im trying to talk him into getting s95 but no luck so far, he dont want pay out for another housing