Baxi 105e pc board?

Hi.THanks for your reply..this is a question i posted a couple of weeks ago but didn't get much success from anybody... Woke up the other morning with no heating or hot water from my 5 or 6 year old baxi 105e combi.i have,within the last 2 months, replaced the central heating temp sensor,and currently have the usual(and sounds like very common)slow drip from the pushrod on the DHW pressure diff valve(cup under the boiler is catching the very occasional drips).the micro switches on the diverter manifold seem to be clicking ok and starting up the fan. though i have noticed that when the boiler is set to hot water only, and i turn the hot water tap on,the push rod for the central heating diff valve raises too,switching the micro switch.not sure if this is supposed to happen or not? the pressure switch connected to the outlet elbow seems to be clicking when i give the tubes a little blow/suck.. the fault lights flashing are the 'flame failure'(30deg) and the 'fault on fan/flue'(50deg).is there anything else i can check before calling in an unknown plummer? i,ve ran out of ideas now.. also got a sparky friend with a meter coming around later today,any advice as to where he should check for me?
When i reset the combi,the fan runs and it tries to fire up three or four times and i can hear the spark,but it never fires up.It just goes back to showing the fault lights as above.hope you can help.

billy
April 2010

why suspect it's the board at fault.
9/10 times it won't be.

whats wrong with the boiler ?

hi-spec plumbing & heating (essex)
March 2010