Laptop gets really hot after changing power jack

[sims213]

Hi,

I recently broke the power jack in my ASUS N71jv laptop because I dropped it.
A couple of weeks ago, I changed the power jack myself, however, a few (major) problems have since occurred:
At first it was fine, but a bit later the power indicator has been constantly switching on/off for a couple of minutes - and the cord has to sit in a certain way in order for it to work.
It has now gotten a lot worse, it's difficult to get it to charge at all now, and on top of that, the laptop seems to be getting really hot, especially near the fans and at the dc jack (the pin on the power adapter gets burning hot). However, the laptop also gets a lot hotter itself than it used to. The pin on the charging adapter also gets really hot after just a few minutes of the laptop being turned on (same sort of goes for the fans).

Unfortunately I can't really check how it works without it being plugged in because the battery only lasts for 10 mins (but it doesn't warn me when it's empty, the laptop just turns off)

Could it be that the dc jack which I bought uses a different current/voltage than my charging adapter/laptop (I have searched the web, but can't seem to find an answer to whether the dc jack has a specific setting to voltage/current) - or could it be that I haven't soldered the dc jack on well enough, or another problem entirely?

I really hope someone can help me, I'd really appreciate it

 

[makkem]

Hi
I would suspect that you have a dry solder joint on the jack,this creates a high resistance which will cause a lot of heat.
You could try resoldering the jack in place which if done correctly should solve the problem.

 

[sims213]

Hi
I would suspect that you have a dry solder joint on the jack,this creates a high resistance which will cause a lot of heat.
You could try resoldering the jack in place which if done correctly should solve the problem.

Thanks for your quick reply!
Should I desolder it first and then solder it back on or?

 

[makkem]

Yes you will get a better joint if you desolder it first and remove as much old solder as possible.

 

[sims213]

Thank you, I'll try doing that

 

[makkem]

you might find one of these helpful
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[sims213]

I have tried to resolder it, but with no result - in fact, I find it harder to get it charging now 🙁

Anyone has other ideas, or is it just med who can't solder properly?

 

[makkem]

Is the new jack identical to the old one ,especially is the center pin the same diameter.

 

[ktriebol]

I rather doubt that there is anything wrong with the jack or the soldering. It sounds more to me like either an internal short in the battery itself, or possibly a short in the wiring associated with the battery. I suggest carefully examining every inch of the battery wiring. look for broken insulation that could cause the conductor to come in to contact with something that it's not supposed to. If that all looks good, then replace the battery. You might find one for low cost on eBay.

 

[sims213]

I don't know if the pin is the same diameter since the old broke off when I dropped it :/

And the pc still has problems with power if I remove the battery, so I don't know if that's the problem

 

[makkem]

Hi
the thing is those jacks come in a multitude of sizes,
For example a common size is 5mm,2.1mm the 5 mm is the outer sleeve diameter and the 2.1 is the center pin diameter.
there are also 5.5 mm,2.1mm and 5mm,2.5mm.
And there are lots more.
Now if one or both these dimensions are wrong then the plug on your charger may appear to fit but will be loose in the socket and you may have to move the plug about to make contact and worse is that the poor contact combined with the relatively high currents can cause overheating .

 

[sims213]

Yes, it could be that the size of the pin is wrong - I just assumed it fitted since it should fit my pc model (and a lot from other websites had same size, as far as I recall) ... However, it doesn't Seem like it says what the appropriate size is anywhere on my charger :/

 

[jarotech]

Yes, it could be that the size of the pin is wrong - I just assumed it fitted since it should fit my pc model (and a lot from other websites had same size, as far as I recall) ... However, it doesn't Seem like it says what the appropriate size is anywhere on my charger :/

Hi, you need a DC jack like this one, http://www.dcpowerjacks.net/catalog/index.php?main_page=product_info&products_id=2201

 

[sims213]

The one I bought also has a 2.5mm pin ... so maybe I just didn't solder it on well enough, or something else broke when I dropped my laptop, I guess