Hard problem to figure out.

[adamv1]

Just to start, I am an experienced technician with well over 100 laptops like this one successfully repaired. This problem has me stumped! Thanks for the help, and now the good stuff.

I am repairing a Gateway NE71b06u model: EG70

The customer used a universal charger which caused a short and afterwards no power indications, no boot. Simple problem i guess, so i Replaced the motherboard. First board no response so I assumed it was dead, sent it back and ordered another, same result. I decided to replace 12v power jack to make sure that wasn't the problem, it wasn't, still no power, no indication from the lights when plugged into a power source. I'm like wtf!

I am now under the assumption that the power button board is fried in some way, so I have ordered one of those. But in my experience that shouldn't affect the power indication lights, i believe i should still see an power connected light on the front of the mobo, but i get nothing. Am i on the right track or is this system cursed in some way.

 

[thx1138v2]

I'm not familiar with that particular model but the method is easy. Start at the jack and start tracing the power. Some I have worked on had power regulation boards separate from the mobo. It could be the button board or something else. Just start tracing it out with a VOM looking for physically destroyed or distorted components along the way. You knew that. Just a reminder.

Maybe it toasted the indicator lights. That would depend on the schematic.

 

[adamv1]

I'm not familiar with that particular model but the method is easy. Start at the jack and start tracing the power. Some I have worked on had power regulation boards separate from the mobo. It could be the button board or something else. Just start tracing it out with a VOM looking for physically destroyed or distorted components along the way. You knew that. Just a reminder.

Maybe it toasted the indicator lights. That would depend on the schematic.

Thanks for the response. My voltmeter isn't working properly so i don't want to use it for testing, but i have ordered another. Usually don't have to use it since the problems are obvious, but this one it wasn't obvious. Don't have a schematic for it either. Would probably help but don't know where to find one.