Hi, so I have a 2004 VZ commodore executive sedan. its auto with 279,000ks on the clock. the issue I'm having is a big one I'm guessing, when I unlock the doors put the key in and try to start it its dead all electrics still work however it doesn't crank it is silent like it has a flat battery however the battery is fully charged and brand new. a few seconds after attempting to start it I get the following error codes on the lcd screen on the cluster. very low fuel fuel gauge error (fuel gauge also reads empty yet I have half a tank) service soon low oil warning abs fault srs fault. ive also had a random warning when trying to start the car the speedo went to max speed the car started beeping and I got driver fasten seatbelt warning. after reading multiple threads it seems like the computer is stuffed. the car was in a slight accident where the driver hit a cement barrier and took out the sump, the car was turned of straight away and towed to be fixed. in the process of it being fixed the after market head unit was removed, and it has never started again. it has sat now for about 2 years and when I put the car into diagnostic mode it shows a trouble code 0000000000000000 1000000000100000 yet the Kincrome OBD2 scan tool could not pick up a fault. things I have tried to make it start are as follows Second hand starter motor fitted, swapped battery for new one jump started checked fuses and relays disconnected negative battery terminal for 60 mins &24 hours left key in ignition and on position for 60 minutes hit starter motor to get it moving tried to clear warnings using lcd display buttons on dash added more fuel moved car to level ground moved car to slight incline tried starting car in neutral tapped fuel tank as fuel pump won't prime rocked car the only thing that got me even close to getting the car to start with the key was shorting the starter relay too many times until the point the starter would just click some how one time it shorted something else the fuel guage read and all warnings were gone apart from SRS and ABS warning and I was able to get the car cranking but not firing with the key. however this was short lived once I turned it off locked the car and left it for a few hours all fault warnings were back. my question is am I right in thinking it is the computer system? or could it be something else I've missed, would I be better off replacing the whole engine being it was damaged and the ks are high and it sat for so long, or should I just get the computer replaced? it is doing my head in the car has sentimental meaning and I just want it on the road. please help!