Inspiron 15r 5010 short circuit, will not power ON!

[rightclix]

Hi fellow community members.

I have a 15r laptop that has left me a little confused, so I was hoping some of the forum members may be able to shed some light on the issue for me.

The laptop simply fails to boot up. The battery is totally dead due to the laptop short circuting everytime I plug it to the mains. I've checked using another ac adapter, same thing. I've checked the voltage of my adapter using a multimeter and it reads a perfect 19.5 v.

I've taken the laptop apart. Originally I thought it was the dc switchboard but I plugged in the power supply and now the green led on the power supply stays on.. strange!

Any suggestions on what to check next? I'm thinking it's the motherboard.

Thanks

 

[C12Friedman]

I would conclude the motherboard if the power jack assembly is not shorting the power pack. Have you tried without the battery installed?

 

[rightclix]

Yes, tried both with and without battery. The led on the power supply stays on.

 

[C12Friedman]

When you depress the power switch, can you feel any tactile feedback or hear a clicking sound?

I'm just a tad bit confused, the unit is back together and the power pack is not acting like it's shorted but still no operation (or am I too confused) - if so, I think I'll go back to my fist inclination here which is that the power jack may be the issue - take a good look at the back of the jack, usually the center pin is power, is it bent, burnt, there even? Here's where I'm going, if the jack was causing the short and that part came off (or loosened from the shorted position) when you disassembled it, the short would no longer be there but neither would power, any lights on the laptop when plugged in or when attempting to power on?

 

[rightclix]

it's not actually put back together. I just thought i'd try plugging in to the mains whilst it's been taken apart and see what happens. This time the led on the power supply remained on but no led's blinked or flashed on the laptop itself hence I am confused as to what it can be.
The jack is not loose, it's pretty solid. Maybe i'm going the wrong way in torubleshooting.
To summarise: I have checked the voltage of the power supply which is fine. I have checked the jack, not loose, nothing burnt, all soldered in position as it should be. I have taken it apart and only have the motherboard and power swithcboard assembled. When I connected it to the mains the led on the power supply remained a solid green, however I saw no led's blink on the laptop. Am I troubleshooting it right?
Thanks

 

[C12Friedman]

Staying with the jack module, I'm referencing this thing here http/www.ebay.com/itm/For-DELL-Inspiron-15R-M5010-N5010-Series-Notebook-PC-Laptop-DC-Power-Board-/321349615843?pt=LH_DefaultDomain_0&hash=item4ad1ee00e3 just want to confirm that is the part we're looking at right now and if so, how does the mosfet (4407?) right behind the jack look?

 

[rightclix]

yes I believe that is the correct jack module. The mofset itself looks fine. Nothing broken. But if I wanted to test it, should I plug in to the mains and use a multimeter?

 

[C12Friedman]

Are CPU, heatsink and ram installed on the motherboard, if not, I'll suggest putting them on - see if any lights from the motherboard then. I'm wondering if whatever was causing the short didn't get taken care of during disassembly...