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[Solved] lenovo g50-45 - does not charge the battery, does not start on the power supply

waldemas1 5961 12
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  • #1 16627097
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    Hello, I have a Lenovo g50-45 laptop (available for purchase). It runs on battery (it was 47 percent). However, when I plug in a 20v 3.25A power adapter, it doesn't charge it. Without a battery, it does not start. In the system, it shows that the power supply is charging it, but it only works on the battery and its indicator drops all the time. Unfortunately, I do not have a second power supply. The meter shows 20 volts. What could be damaged and whether it would be worth repairing. Thanks for your understanding and any answers.
    Model 50053 power supply 65W manufacturer nTec (Qoltec).
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  • #2 16627104
    boro1234567
    IT specialist  
    Posts: 26420
    Help: 2772
    Rate: 1534
    Board Language: polish
    waldemas1 wrote:
    What could be damaged

    It has to be diagnosed and measured.
    waldemas1 wrote:
    will it be worth repairing.
    Yes.
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  • #3 16627109
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    What to Measure? Does this look like a malfunction inside the laptop?
  • #4 16627251
    grubas
    Level 40  
    Posts: 5524
    Help: 647
    Rate: 551
    Board Language: polish
    Yes. Return to service.
  • #5 16627281
    lisek
    Service technician RTV  
    Posts: 39699
    Help: 6305
    Rate: 6794
    Board Language: polish
    It can be a standard damage, e.g. Link
    * sometimes still bq737
    * or Link
    Remember this G50-45 series under AMD. (cpu: A4 and A6 artwork disc.)

    She was usually on the album: NM-A281 rev.1.0 and various weaker and better processors
    Power socket with pin (ID signal)
    - maybe a problem at NCB
    _______________________
    Please provide the full name or configuration of the laptop from the listing
    - e.g. what processor

    calculate and calculate
    - auction price + repair =?
  • #6 16627338
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    lenovo g50-45
    model 80E3
    radeon R2 graphics
    AMD e1-6010 APU witch AMD Radeon r2 Graphics processor
    price PLN 200 (total)
    Fully functional on battery.
    It was enough for me to work on a cable (power supply) and nothing here.
    What is the cost of repair, plus or minus. (By eye)
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  • #8 16627926
    boro1234567
    IT specialist  
    Posts: 26420
    Help: 2772
    Rate: 1534
    Board Language: polish
    waldemas1 wrote:
    What to Measure?

    Voltages, currents, other electronic components.
    waldemas1 wrote:
    Does this look like a malfunction inside the laptop?

    Definitely.
    waldemas1 wrote:
    What is the cost of repair, plus or minus. (By eye)

    About 150.
  • #9 16628086
    lisek
    Service technician RTV  
    Posts: 39699
    Help: 6305
    Rate: 6794
    Board Language: polish
    This model on the AMD E1-6010 (1.35GHz) from the 2014 is not a revelation.
    Description of the cpu Link
    In addition, the built-in graphics APU R2 is frequency. 350MHz
    DDR3 RAM memory L. is a 64-bit bus

    Loses in all tests with the i3-2310 (from 2011)

    Good for internet and YT.
    You won't play the 2014 games too much.
    On Linux, it's a bit faster!

    ps
    My advice
    - add a little $, look for something "polising" much better!
  • #10 16628512
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    It's equipment for the Internet and work, and a movie.
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  • #11 16629405
    slawmix1234
    Level 32  
    Posts: 2319
    Help: 130
    Rate: 101
    Board Language: polish
    It should work without a battery, have you checked the power supply with a 24V car bulb at least?
  • #12 16629852
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    I checked with a meter.
  • #13 18905213
    waldemas1
    Level 11  
    Posts: 31
    Rate: 24
    Board Language: polish
    He went in parts.
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Topic summary

✨ The Lenovo G50-45 laptop is experiencing issues where it does not charge the battery or start when connected to a power supply. The user reports that the laptop operates on battery power but fails to charge when a 20V 3.25A power adapter is plugged in. Responses suggest diagnosing the internal components, including potential damage to the power socket or motherboard. Some users recommend checking voltages and currents, while others mention the possibility of driver issues. The laptop is identified as having an AMD E1-6010 APU and Radeon R2 graphics, with suggestions to consider repair costs versus purchasing a new device.
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FAQ

TL;DR: Lenovo G50-45 with a 20V/3.25A adapter and a 47% battery that won’t charge usually needs board-level checks — "It has to be diagnosed and measured." [Elektroda, boro1234567, post #16627104]

Why it matters: This FAQ helps owners fix or triage no-charge, no-AC-start issues on Lenovo G50-45 laptops.

Quick Facts

How do I fix a Lenovo G50-45 that won’t charge or start on AC?

Start with the power adapter and jack. Load‑test the adapter, then inspect the DC jack and board power path. Technicians advise proper measurements before part swaps. If AC shows “charging” while the battery drains, the fault is inside the laptop. Service evaluation is recommended. [Elektroda, boro1234567, post #16627104]

Is this failure likely inside the laptop, not the adapter?

Yes. The symptoms point to an internal fault when the system reports charging but only runs on battery and won’t start on AC alone. Experts confirmed it requires diagnosis on the motherboard power path. [Elektroda, boro1234567, post #16627926]

Can a G50-45 run without a battery installed?

It should. If it refuses to power on from the adapter alone, test the adapter under load and inspect the DC‑in circuit and identification line. A healthy unit boots on AC-only. [Elektroda, slawmix1234, post #16629405]

How do I load‑test the 20V adapter at home?

Use a 24V automotive bulb as a simple load. Connect it across the adapter output and verify it holds near 20V and the bulb lights steadily. Voltage sag or flicker indicates a weak adapter despite a good no‑load reading. [Elektroda, slawmix1234, post #16629405]

What parts commonly fail in the G50-45 charging path?

Community notes point to the DC jack with ID pin, the charger controller (e.g., “bq737” reference), or related power stages on NM‑A281. Faults there can block charging and AC operation. Board‑level diagnosis isolates the culprit. [Elektroda, lisek, post #16627281]

What does the ID pin in the Lenovo power jack do?

The ID pin carries an identification signal that lets the motherboard recognize the adapter. If the ID line is damaged or open, the laptop may refuse to charge or power on from AC. [Elektroda, lisek, post #16627281]

Which motherboard is in the G50-45, and why does it matter?

Most G50‑45 units use the NM‑A281 board. Knowing the board ID helps locate the charging IC, MOSFETs, and jack connections in schematics and repair guides. This speeds accurate measurements and repairs. [Elektroda, lisek, post #16627281]

Could this be a Windows driver issue showing “plugged in, not charging”?

Sometimes drivers or ACPI battery management cause that message. Reinstall battery drivers, update BIOS, and retest. If AC‑only boot still fails, treat it as hardware. A contributor provided a driver‑focused troubleshooting reference. [Elektroda, elecol, post #16627672]

What repair cost should I expect for this fault?

Technician guidance in the thread suggests about PLN 150 for typical power‑path repairs. Final pricing depends on parts, board damage, and labor. Get a written estimate after diagnosis. [Elektroda, boro1234567, post #16627926]

Is it worth repairing the AMD E1-6010 G50-45?

This platform is entry‑level: E1‑6010 at 1.35 GHz with R2 graphics around 350 MHz and a 64‑bit DDR3 bus. It’s fine for web, office, and YouTube, but lags in modern games. Consider repair only if your needs are light. [Elektroda, lisek, post #16628086]

Give me a 3‑step quick diagnosis checklist.

  1. Load‑test the 20V adapter with a 24V car bulb and confirm stable output.
  2. Try AC‑only boot; watch for charge LED or messages.
  3. If it still fails, inspect the DC jack/ID line and proceed to board‑level checks. [Elektroda, slawmix1234, post #16629405]

What do experts recommend if I lack tools or experience?

Seek service. As one expert put it, “Return to service.” Board‑level issues require measurements of voltages, currents, and components with proper equipment. This prevents misdiagnosis and further damage. [Elektroda, grubas, post #16627251]

Why does my meter show 20V, yet the laptop still won’t power?

No‑load readings can mislead. A weak adapter may show 20V but collapse under load. The bulb test exposes this edge case, revealing sag or instability the laptop detects and rejects. [Elektroda, slawmix1234, post #16629405]

What was the outcome in the original case?

The owner ultimately dismantled the laptop and sold it for parts. This underscores the value of early, accurate diagnosis before investing in repairs or accessories. [Elektroda, waldemas1, post #18905213]
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