Another Starting Problem!

:banghead: Hi All, I am yet another Laguna owner with a starting fault. Started again few days ago (had previously had similar prob 5 years ago - fuel pump and terminals e.t.c. renewed) I believe it could be same problem but would i be getting it again so soon? Vehicle intermittently does not start - all dashboard lights up - but nothing there. Tinkering with connections at top of fuel tank (in boot) have managed to get started last couple of times. But today dash warning lights flashing (fuel injection light / service light) together with centre console light. Does this just show a electronic error has occurred - which i know has - or should i take it to Renault dealer immediately as the handbook says. Is it time to trade the poor old girl in (1996 2.0 RT) nearly 150,000 on the clock - ANYONE HELP!