Help me to find the problem. I have Inspiron N4010 without ATI GPU. Pcb DA0UM8MB6E0. Problem is that when i power it on power LED(in on/off board) just lit and within 2 seconds it gets off. I dont know where to start. I brushed the bioses and replaced ITE chip but still same.

Please help me
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Only +3v ALW is present in OFF mode . when i press power button +5v ALW and comes and motherboard goes OFF. in every start same position

I think you have overload on 5ALW circuit.

try to rehot with air blower under the chip :)