Hi guys ,I am new here and in need of help. My ecu 036906034kj is not working, no communication. When I switch on ignition I will not get any sound on throttle body or any unit in the engine but on the dash everything seems normal even doors lock unlocks with the key. The car had been in a small crash and battery burst and I assume the acid from battery had caused ecu to stop function. I bought a same part numbered ecu from ebay and when I connect it and switch on ignition I can here all sounds of units in the engine meaning that there is life but the problem comes, immo led flashing on cluster and when I press on accelerator pedal I hear a buzzing sound wonder why is it doing it.

The question is what is the easiest way to get engine startup? I attached the ecu picture

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