Power Jack Problems MOVE + UPDATE

[TheFloatingBrain]

This is a repost from Prebuilts and Laptops, I thought it would be more appropriate here

and I have an update.

 

I have a lenovo Y700 laptop and I started having problems with my power jack earlier this week.

At first I thought it was because the jack wasn't staying mounted in the case, however when I

glued it down the problem persisted. I then thought there was glue inside it, there was, but after I got

it all out, the problem remained. If I moved the plug, pulling it to one side or the other for instance,

the computer would receive power intermittently (the plug inside the jack, moving the cord did nothing).

I ordered a replacement part on amazon. At first I was delighted that the cheap repair appeared

to work but this part too seems to cut out on average probably once per hour at which point it would

require (much less drastic) me moving it around inside/the jack (what little mobility that is) again.

But it usually stays longer this way (though some movemets only hold a little while) I pulled out a DMM today

to do continuity testing on both jacks (both while they were unplugged from the mobo and plugged into the mobo

while the computer was off), they appear slightly different but they both make sense and have

recognizable patterns. I did a little bit of testing while the computer was on and got similar results as the

extensive testing with the computer off/the jacks unplugged from the mobo, however I was not able to

reproduce the conditions that lead to a bad power connection and was unable to mesure what was

happening. I noticed the new part doesnt seem to fit as nicely on the prongs on the mobo as the one

that came with the computer, the leads inside the plastic connector seemed to jiggle around, I am wondering

if this has something to do with it it (though they are still making contact) or the fact that it appears to be

wired slightly differently than the one that was already in there. Does anyone have any idea what might

cause this? Bad cap on the mobo? Need a more quality part? etc.

 

UPDATE:
    Last night I brought the computer over another house and for some reason it didnt

want to charge almost at all there, it would be really finicky with how it sat inside the jack

or whatever the problem is, and I would only get a few minutes of charging at most. Once

when it was unplugged and still has 20+ minutes of battery left (no warning sign on the battery

symbol) it just shut off in my face and didnt seem overheated.

 

Thanks!

 - TFB

[LamoidZombieDog]

if the Internal part receiving power is only working when moving the cable around then yes. whatever board its sitting on, its probably not making good contact and needs to be re-soldered 

[TheFloatingBrain]

On 7/22/2019 at 5:12 PM, LamoidZombieDog said:

if the Internal part receiving power is only working when moving the cable around then yes. whatever board its sitting on, its probably not making good contact and needs to be re-soldered 

Thank you for the reply, does this include if it plugs into a jack or prongs in which case the prongs would need to be soldered?

[LamoidZombieDog]

On 7/24/2019 at 11:56 AM, TheFloatingBrain said:

Thank you for the reply, does this include if it plugs into a jack or prongs in which case the prongs would need to be soldered?

it just means the internal plug needs to be resoldered