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Motherboard heats up when charger is plugged in - Dell Inspiron 15r


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#1 DomMartinelli

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Posted 07 July 2014 - 01:38 PM

Hello,

I'm having a problem with my computer obviously, I had to replace my DC power jack socket because it was physically broken. Upon doing so, Ive encountered problems. I have replaced this socket more than 5 times in the past without issue. The slot where i slide in the power ribbon cable was slightly broken so I used aluminum to power it on instead of the cable. Might that be the issue? Anyways, I cant turn on the computer anymore and it over heats in the area in the picture below. It gets really hot and the computer isnt on, just the charger cable is plugged in.

 

How do I fix this?

 

Picture :
 

http://gyazo.com/78eb738d0b2fffb07eea58d7c9c76b13



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#2 zingo156

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Posted 07 July 2014 - 02:11 PM

I am confused how you are using aluminum to power it on? Are you shorting all of the pins where the power button ribbon plugs in? Only 2 pins/traces should be shorted to power the computer on. You could directly solder to those pins a new power button. The other pins may go to LED lighting or something like that, if you short those pins then you may get heat due to the short. I really can not know for certain without more details about how you are using aluminum to power this computer on. By over heat, has there been any physical burn to the mainboard in that area? If so you may be out of luck and the mainboard may need to be repalced.

 

I have no idea what pin does what, I could not find a pin out so a multimeter would need to be used to check for voltages from all of the pins.


Edited by zingo156, 07 July 2014 - 02:15 PM.

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#3 DomMartinelli

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Posted 07 July 2014 - 02:20 PM

First off, the ribbon itself was broken so I just jammed the aluminum in the pins and that worked for a couple of months. All i needed to do was push it on the pins on the motherboard. Then I finally bought another ribbon cable but the pins are now bent so it's difficult to make work. I'll try to post a picture to make it clearer.



#4 DomMartinelli

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Posted 07 July 2014 - 02:48 PM

Pictures below

 

The black thing that I do not know the name of heats up the most, it becomes scolding hot. It is within the red rectangle. 

 

 

Attached Files


Edited by DomMartinelli, 07 July 2014 - 02:54 PM.


#5 zingo156

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Posted 07 July 2014 - 02:59 PM

You may be able to bend the pins back, the top pins may generally only hold the ribbon cable down (with pressure againts the bottom pins) to make contact with the cable. The plastic piece that also applies pressure is missing.

 

It is a bad idea to be turning the computer on that way...

 

You are likely shorting more than just the power switch, the LED powered circuits if you short them, may cause permanent damage to your board.

 

All may not be lost here, on the back side of the connector (the other side of where your aluminum foil is located), the pins there are the pins the cable connects to, you could solder the cable directly to those pins and then use the power button. Because I could not find a pinout of that connection, I do not know which pins do what. So directly soldering on the ribbon cable might be the best option just make sure you solder the cable correctly (think about the direction the ribbon cable plugs in while soldering...

 

Only 2 pins should be needed for the power button (those are the 2 you can short without damage to power on the computer). There are 5 pins in total, some of those likely are for LED lights, as mentioned, shorting those pins that carry current is a dead short which will cause heat and potentially damage the mainboard.

 

I will continue to look for a pinout.


Edited by zingo156, 07 July 2014 - 03:11 PM.

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#6 zingo156

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Posted 07 July 2014 - 03:13 PM

Can you give me more information about the model number? Is it an n5010? Let me know all of the information you can.


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#7 DomMartinelli

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Posted 07 July 2014 - 03:17 PM

It's a dell inspiron 7520 15r SE.

I just bent the pins back and slid the new ribbon cable in and tried to power it on while applying pressure to it and making sure it was properly connected but it wouldn't work.

 

The second I plug in the charger the black thing that I previously emphasized quickly turned scolding hot. It took less than 5 seconds. 



#8 zingo156

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Posted 07 July 2014 - 03:19 PM

I still can not find a pinout, what might help is taking a picture of the power button and ribbon cable. If the picture is good enough, I can follow traces to the power botton and tell you which pins are safe to short to power on the computer.


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#9 zingo156

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Posted 07 July 2014 - 03:20 PM

I will look with the new numbers.


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#10 DomMartinelli

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Posted 07 July 2014 - 03:25 PM

give me a minute im uploading hd pics



#11 zingo156

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Posted 07 July 2014 - 03:25 PM

Roger that. I still can not find a pinout, pictures may be the only way.


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#12 DomMartinelli

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Posted 07 July 2014 - 03:31 PM

http://gyazo.com/5e430fbf52fe177cc0fc820f61a7092c

 

 

http://gyazo.com/3923d8a6d467a5900f7f99cf7336e9e4

 

 

 

http://gyazo.com/1e0a48002efba21432ea234065d908af

 

Pictures could have been better, if you need a clearer picture, let me know.



#13 zingo156

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Posted 07 July 2014 - 03:51 PM

I need a slightly better picture of the back of the power button (the little button board itself on the oposite side of the button) try to get a lot of light on it. What I am looking for is where the traces go from the ribbon cable. You may be able to follow those yourself. There are 4 traces to follow, the only 2 you need to worry about are the ones that go to the power button, on most buttons, 3 pins are ground or just used to hold the button on the board, and 1 will carry the signal.


Edited by zingo156, 07 July 2014 - 03:52 PM.

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#14 zingo156

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Posted 07 July 2014 - 04:05 PM

From the first listed picture, I see the letters jpower, is that pointing to anything? It is hard to tell from the pic.


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#15 DomMartinelli

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Posted 07 July 2014 - 04:07 PM

Back:

http://gyazo.com/626845cc034d7d704164babafd888c03

 

http://gyazo.com/e614a1e684aed5d4e05cc280274bfd38

 

Front:
 

http://gyazo.com/24656386d2e5d500df47b532795d0222

 

http://gyazo.com/b2eab427f8b9bf46f0b87731a51e8a0f

 

http://gyazo.com/f5577111cc3347be47f547edaf3f44cf

 

http://gyazo.com/849269ddb1f064f53b3229d15a30ad3b

 

http://gyazo.com/54860e2d4e60819d49f17df8d8ad0cd8






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