Re: macbook pro A1728 cant charge battery
did any body solve this issue
did any body solve this issue
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Re: macbook pro A1728 cant charge battery
As I have said, I have not seen a problem like yours were the 12 volts keeps cycling from 0 to 12 volts. Usually when a problem happens the software just stops the machine from running. That is why I wonder if this is not a software problem? What ever the case may be dellxps15 has experience with these machines. You might want to follow his instructions.Comment
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Re: macbook pro A1728 cant charge battery
may be u have not seen this problem before but i am experiencing this for second time ...normally this issue as i stated can solve by changing charging ic but this time i unable to solve itComment
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Re: macbook pro A1728 cant charge battery
It would seem odd to me that the 12 volts is cycling from 0Volt to 12 Volts every two seconds. I do not have the schematic for this board. I would concentrate on what the 12 volts turns on and try and determine what 12 volt device on the board is not turning on.Comment
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Re: macbook pro A1728 cant charge battery
try this schematicComment
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Re: macbook pro A1728 cant charge battery
check data line resistors between SMC and battery.Comment
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Re: macbook pro A1728 cant charge battery
So you have measured both sides of the fuse? Is this measurement with battery in or out? Also check for voltage on F9700 and anywhere that 12 volt line goes just to make sure it is going there. Also check SMC_RESET_L to see if it goes high. All measurements need to be done at the end of the line. Looking at page 3 this will show you where they go. If you find one not working then you trace backwards.Last edited by keeney123; 10-09-2016, 01:59 PM.Comment
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I bought a Vostro 3400 motherboard (LA-K033P) to upgrade over my damaged Inspiron 5593 (LA-J091P) board. Everything else is ok except for the battery. This battery I am using now is already a replacement one since I disposed of the bloated original one. Back in the Inspiron 5593 motherboard, the battery charges fine and is identified just fine. However, with the upgraded motherboard, suddenly the replacement battery is labeled as "Not a dell battery". When I borrow a similar battery from my colleague (which did not have replacements yet), it is identified and charges just fine.
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Hello,
it's not a laptop/desktop related question but I figured that someone here will have the right knowledge.
At work we use a few Aldebaran(now Softbank/United Robotics group) Nao Robots which they use some custom 6S li-on battery packs.
Nao robots tends to draw from the battery even if they are shut down, and the BMS tends to be a little aggresive, if the pack stays on a turned off robot for 3 months it's gonna lock and will refuse to charge.
Now, I have noticed a few things.
The "dead" battery, while connected to charger and NOT Charging will... -
Hi
Acer A515-43
LA-H801P
Fail: Does not charge battery, has low voltaje on connector.
Laptop didn't want to turn on, only charge led blinked.
I found PQB5 (mosfet high battery charger) in short, voltaje in +12.6V_BATT was 19 v ...
I changed it, changed PQB6 too and now battery charger voltage is 4.4V but battery is 3 cell, 11.25v, then is very low to charging.
Laptop turns on without battery and works fine, but with battery turns on and turns off inmediately, I suspect battery bad but I don't know... -
Hello All,
I have a unusual problem with a MacBook Air 2014 820-3437 that it will not charge the battery. I have 2 batteries that charge just fine in another 820-3437 so i assume that the batteries themselves are OK. One was new in 2020.
This board started off as a PP3v3_S5 short that was resolved (shorted capacitor) and came to life fine. While testing the computer I noticed that the battery was not charging so I checked the following components:
Current sensing:
R7121 10 ohm
R7122 10 ohm
R7151 2.2 ohm
R7152 0 ohm
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Hello, I have a MacBook Air M1 that got water on it and now the computer does not charge the battery. The USB C port does work since I can connect the computer to HDMI for example. The battery also works well since if I connect a motherboard from another MacBook Air M1, the battery charges.
Anyone know what can it be?06-18-2024, 11:28 AM
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