Question about Lenovo IdeaPad U550 (374955U) PC Notebook

1 Answer

Laptop will not charge battery. Issue with internal power converter, etc.

Problem: Laptop will not charge any batteries, but is able to use charge from batteries and read charge level from battery chip. Cannot flash BIOS (InsydeH2O) with new version because one does not exist. OS Win 7 Ultimate. AC power adapter will power PC with no battery present. What I have done to troubleshoot problem: With my laptop: 1) Used new battery in laptop. Will not charge. Will read battery chip. 2) Used same model battery from different laptop in current laptop. Will not charge. Will read battery chip. 3) Re-installed operating system, updated Microsoft ACPI-Compliant Control Method Battery drivers. Battery will not charge. Will read battery chip. 4) Tried a new AC Power adapter. Will power laptop. Will not charge battery. Will read battery chip. With a different U550: 1) All batteries charge in the alternate U550. All battery chips can be read. 2) Old AC power adapter will charge and power alternate U550. I have come to the conclusion that the internal DC converter for the battery is shot. I need a second opinion based on the details above.

Posted by Benjamin Sealy on

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John Cunningham

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  • Lenovo Master
  • 6,771 Answers

The motherboard has charging circuits built in to regulate the charge to the main battery, in rare causes it fails leaving a choice to attempt a repair or replace the motherboard. I suspect this is what has happened to your system.

Posted on Apr 06, 2012

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5 Related Answers

elix0411

Jose Cada

  • 3530 Answers

SOURCE: Lenovo z60m power "LED" goes off and doesn't charge battery

try draining the battery first.in order to do this. batery should be taken out the laptop. power adapter is unplugged. press and hold the power button then counte 1 to 10 then release your finger after 10 secs. then press in again then count. do that for 3 times. plugged everything back in and monitor the status afterwards

If you need further help, reach me via phone at https://www.6ya.com/expert/elixirjose_00375ea24bd8141b

Posted on Mar 25, 2010

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Anonymous

  • 33 Answers

SOURCE: Model: Lenovo Thinkpad T400 Issue: 1.

sound like you may have a bad battery charge board but let us pray that it is a separate baord that plugs into the mother board

Posted on Oct 30, 2009

Anonymous

  • 29 Answers

SOURCE: Lenovo T60 power port not working

If the docking station charging doesn't work either and your battery is ok you have lost voltage regulator (it prevents overcharging of battery) Take the battery to a battery plus store and they can check it..

Posted on Sep 10, 2009

Michelle Baira

  • 103 Answers

SOURCE: My Computer Wont Charge!!

if the charger power up your laptop,that means that the charger is working fine,what you need to do is just replaced the battery

Posted on Jun 28, 2010

heeman mohun

  • 1341 Answers

SOURCE: Lenovo Z560 laptop battery charge

A sudden drop from 50% to 7% means that the battery is faulty, it is simply a case where it is not holding any charge. I would suggest you contact the seller and check if the battery is under warranty. Hope this helps and good luck.Any question please feel free to ask.

Posted on Dec 30, 2010

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1 Answer

Dell inspiron 1525 pluged in not charging


When you say it won't charge, does it charge at all?

1. It indicates that it is charging, but as soon as you unplug the charger the battery quickly or immediately indicates it is dead. If the laptop is off, the LED on the laptop shows it is charging but the battery is always dead,

2. It is as if you didn't have the charger plugged in. No light on the laptop at all when the charger is plugged in.

Possible solutions:

1. The battery has died and is no longer capable of taking a charge. An alternate explanation if you can't even get the laptop to turn on even though the laptop charge LED is on, is that the internal power supply that converts the incoming and battery voltage to all the voltages required has died.

2. The power connector inside the laptop is a common failure point. The solder joints break from various minor shocks over time. This is going to become more common with lead-free solder as it is more brittle. Less likely is that the charging circuit inside the laptop has failed.

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Lenovo Y530 T 3200 3GHZ 4G Laptop not charging battery when plugged into outlet;also does not work on battery alone even though it is charged to 85%


Try to perfrom power drain. You must first turn off the computer. Take out the battery and unplug the power adapter. Press and hold the power button for 30 secs. Put the batter back in, plug in the power adapter and power ip the computer then observe.

Let me know if same issue will happen.

If you need further help, reach me via phone at https://www.6ya.com/expert/elixirjose_00375ea24bd8141b

May 11, 2010 | Lenovo IdeaPad Y530-3231U Laptop Computer...

1 Answer

My laptop won't charge when plugged in...I changed the charger but still won't charge


When you say it won't charge, does it charge at all?
1. It indicates that it is charging, but as soon as you unplug the charger the battery quickly or immediately indicates it is dead. If the laptop is off, the LED on the laptop shows it is charging but the battery is always dead,
Or:
2. It is as if you didn't have the charger plugged in. No light on the laptop at all when the charger is plugged in.
Possible solutions:
1. The battery has died and is no longer capable of taking a charge. An alternate explanation if you can't even get the laptop to turn on even though the laptop charge LED is on, is that the internal power supply that converts the incoming and battery voltage to all the voltages required has died.
Or:
2. The power connector inside the laptop is a common failure point. The solder joints break from various minor shocks over time. This is going to become more common with lead-free solder as it is more brittle. Less likely is that the charging circuit inside the laptop has failed.

Feb 06, 2010 | Acer Aspire 5500 5570-2609 Laptop

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I've re-installed Windows XP on a ESystems 3090 laptop, but the battery is failing to be charged at all. Am i missing drivers or is the internal battery dead ?


your operating system probably requires more juice than the battery is capable of. batteries do tend to fail as they get older. This is usually not a driver issue.

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1 Answer

Changed motherboard, needs battery to power up, but when battery goes dead no power. does this laptop need battery to power up?


no, means your charging circuit / charge controller is not working. Double check that the board (also known as DC converter or DC Controller) is seated firmly, all connectors are in place, etc. You may also check the power supply as well, or try substituting another supply for a short time.

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Can't charge battery


Remove the battery and try if the PC turn on connecting to direct currrent.
If it turn on (whitout battery), the issue should be a connector problem or a damaged internal recargher.

Oct 19, 2009 | Toshiba Satellite A75-S2112: A75-S2112...

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Dell Latitude D600 won't power on w/ or w/out power adapter


the problem is really mysterious. because in most of cases the battery is the villain. and when it is replaced the issue should be over. there are no other components of a laptop which is directly or indirectly related with battery perfomance.
any way get back me with more details like the age of system and number of times taken to service center etc etc @ [email protected]

Aug 22, 2009 | Dell Latitude D600 Notebook

1 Answer

Power issues on HP DV1000


It is possible you have two dud batteries. Recharageable batteries have a limited life, they have a finite number of charge and discharge cycles.
With the battery removed and only the power supply connected and the laptop powered up, when you touch the connector on the laptop and the laptop does not shut down then the laptop connector is OK.

If you can verify your new battery is OK the the fault could be the power supply adapter, if may not produce enought current to run and charge the battery. Try charging the battery overnight by turning off the laptop and leaving on the mains t charge. Borrow a mains adapter and test it on your computer.

You can also check the BIOS setting for power management, ie. hibernate, low power shut down etc.


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1 Answer

Not charing


It is VERY difficult to break a wire or connection internally dropping, shaking, or otherwise damaging the laptop. But I'm going to try and give you an answer without just telling you, "the batteries bad get a new one."

That said, typically batteries either are good and hold a charge or they are bad and they don't. There isn't a lot to a laptop between the battery and power-supply. So, assuming the laptop is in fairly good condition, you will probably just need to replace the battery.

A lot can make the battery fail faster than it should. I've been told for example that running on a car phase converter all the time to charge your batteries, no running on batteries very often so that your always charging, etc. can lower battery life.

The only other problem I can think related to batteries is where the contacts have become corroded on the battery itself or in the laptop where the battery connects, which is something you should be able to visibly see.

If this is the case however and they are rusty, you can clean them off with a pencil eraser, cotton swab and sprite, or alcohol.

You can also use an ohmmeter to check the voltage both from the machine and in the battery itself.

Hopefully something here will help you with your problem.

Jul 25, 2008 | Acer Aspire 3680 Laptop

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