Need help, please
 

I have no display when I open the door to the car on the dash, no mileage or information at all, no gauges.

when I turn the key all the way on, i get an abs light flash and the esp light stays on. when turn it to crank it runs for 2 seconds and dies. I charged the battery, it cranks fine. I also tried both keys and took both battery cables off and touched them together to reset the ecu.

I have read a small bit that there might be a relay or it could be the ignition switch.

I am thinking it isn't the ignition switch because there is no display at any time.

The display was working fine, car ran fine yeasterday. I am hoping that there might be a relay or a broken wire somewhere you guys could send me in the right direction to fix.

Please any help is appreciated.

2004 audi a4 b6 cabriolet

At the key there are 2 circuits, 1 to start then 1 to run, thats why it starts when its cranking but won't run once you stop. You need to check the run circuit and you'll need a good manual for that. Might need a new ignition switch switch but check the circuit first. I'm guessing you have no power to the coils in the run position.