Thank you so much to everyone for your comments. The car is a 2006 Coupe automatic. Yes it did occasionally demonstrate similar symptoms but I put it down to low battery. All the lights come on when I try to start and indeed there is nothing wrong with the battery which I have had checked 2 or 3 times independently. You turn the key and all the control lights come on but when turn to start there is nothing. When the lights come on there is a single bleep. If the ignition is left on the engine fan comes onto full speed. There is power going into the PCM but nothing coming out. I am told that either the codes have been wiped or the PCM is defective. I have tried switching on at least 5 times and leaving 10 seconds but this has no effect at all. She was working fine when I last used her but as I say I have had this problem intermittently over 12 months mostly in Winter. I will look at the page in the manual as indicated and reply. Also I dont think that the warranty applied in UK unfortunately because I took up what warranties applied directly with Chysler UK shortly after buying the vehicle and I was told 3 years or 60,000 miles. Thank you everyone for your continued help.