Acer Aspire 5742 no power from dc jack, replaced it, still no power

[Huludrock]

I replaced the DC jack on an Acer today with a new one. When the laptop has the battery in the power LED shows a power source(unfortunately the battery is dead). When I remove the battery and plug in the charger to the new DC jack, no LED. Hitting the power button results in a flash from the power button light and power LED for an instant but no POST or boot. I tried different chargers as I have a few universals laying around so that's not it.....What's the problem?

 

[Digital Life]

Maybe not enough power on my acer laptop the charger says the output is 19 volts 3.4 amps and it runs fine without the battery installed, When I dont have the battery installed and the charger pluged in there is no indication that the changer is indeed plugged in and also when I turn it on I usually press the button just a bit longer to turn it on

 

[Huludrock]

Yep I thought of that too but my universals are adjustable and I matched the voltage with no result. Gotta be mobo I guess.

 

[Digital Life]

The voltage is fine but will it supply enough amp's 3 or 4 amps is quite a lot for a universal charger

 

[Huludrock]

They go high enough for amperage too.