Updated 19 October 2026
A laptop that won't charge has the problem in one of four places: a battery charge-limit setting, the charger or cable, the charging port (DC jack or USB-C), or the charging circuit on the motherboard. Sometimes the battery is simply worn out. The checks below tell you which. Port and DC jack repairs start from $189, batteries from $179 and board-level charging repairs from $329.
Phone advice is free on 02 8428 9224. A hands-on diagnostic is $150, waived if you go ahead with the repair. Repairs carry a 12-month warranty on parts and labour, covering the same fault.
Laptop not charging: how to tell which part has failed
Check the cheapest explanation first: a setting, then the charger, then the port, then the battery and the board.
- Stops at the same percentage every time (50%, 60% or 80%)? That is a charge-limit setting, not a fault.
- Try a known-good charger with the same plug and wattage. If the laptop charges, your charger has failed.
- Move the plug gently. If the charging light flickers, or it only charges at an angle, the port or DC jack is worn.
- Run the Windows battery report (below). Full charge capacity well under design capacity means a worn battery.
- Runs on the charger but never charges? The battery or the board's charging circuit. No power at all: see laptop won't turn on.
What do you see?
Stops at the same % every time
- Most likely
- A charge-limit setting is on. The laptop is working as set.
- Try first
- Turn the limit off in the maker's app or BIOS (table below), then charge to 100%.
- What we check
- If it still stops with the limit off, we test the battery and charging circuit.
- Cost
- Quoted after diagnosis
Runs on the charger but stays at 0% or low
- Most likely
- A worn battery, an unrecognised charger or a charging-circuit fault.
- Try first
- Try a known-good charger. Run
powercfg /batteryreportand compare the two capacities. - What we check
- We load-test the battery and check the charger IC and power path.
- Cost
- From $179
Charges only at an angle, or the light flickers
- Most likely
- A worn DC jack or USB-C port, cracked joints or a broken DC-in cable.
- Try first
- Look in the port with a torch and clear fluff with compressed air. Don't force the plug.
- What we check
- We test the jack, its cable and the pads, then replace what has failed.
- Cost
- From $189
USB-C: "use a higher-watt charger"
- Most likely
- The charger or cable cannot supply the wattage the laptop needs.
- Try first
- Use a USB PD charger at least as powerful as the original, and try each USB-C port.
- What we check
- We check the USB-C port, PD controller and input MOSFETs.
- Cost
- From $189
No charging light at all
- Most likely
- A dead charger, a broken jack or cable, or a fault at the board's power input.
- Try first
- Try another wall socket and another charger.
- What we check
- We measure voltage at the jack and along the board's input power path.
- Cost
- From $189
Case bulging or touchpad lifting
- Most likely
- A swollen battery.
- Try first
- Nothing safe to try at home. Stop using it and unplug the charger.
- What we check
- We remove the battery and check the case, keyboard and touchpad.
- Cost
- From $179
Battery stops at 50%, 60% or 80%: charge-limit settings
A laptop that stops at the same percentage every time is usually obeying a battery-care setting. Makers add them to slow battery wear on laptops left plugged in, and HP notes that "Plugged in, not charging" can come from one rather than a bad battery. Turn it off and see if it reaches 100%.
| Brand | Setting | Where to find it | What it does |
|---|---|---|---|
| Lenovo (IdeaPad) | Conservation Mode | Lenovo Vantage > Device > My Device Settings > Battery | Stops at about 55% to 60% |
| Dell | Primarily AC Use, Adaptive, Custom | Dell Power Manager (options vary by model) | Primarily AC Use keeps it below 100%; Custom sets your own stop point |
| HP | Battery Health Manager | System BIOS settings | "Maximize my battery health" caps charge at 80% |
| ASUS | Battery Health Charging | MyASUS > Device Settings, or right-click the battery icon | Balanced Mode stops at 80%; Maximum Lifespan Mode at 60% |
| Acer | Battery Charge Limit | Acer Care Center, AcerSense or Control Center (by model) | Stops at 80% |
| Microsoft Surface | Smart Charging | Automatic; override in Surface app > Battery & charging | Holds at 80% when left plugged in; heart on the battery icon |
| Microsoft Surface | Battery Limit | Surface UEFI > Boot configuration > Advanced Options | Stops at 50% |
Sources: Lenovo (IdeaPad), Dell, HP, ASUS, Acer, Microsoft Surface, Microsoft Surface
Dell, HP and Lenovo laptop not charging: first checks
Each brand has a first check before you suspect the hardware.
- Lenovo: on IdeaPads, Lenovo says a battery that stops at 55% to 60% is often Conservation Mode (Lenovo Vantage > Device > My Device Settings > Battery).
- HP: check Battery Health Manager in the BIOS. HP's steps are a hard reset, then HP Battery Check.
- Dell: with the laptop off and the charger in, no battery light means no power is arriving or the port has failed; blinking amber means a battery or charging problem.
What "Plugged in, not charging" means in Windows
"Plugged in, not charging" means Windows sees the charger, but the battery is not taking charge. Dell and HP list the causes: a charge limit, an incompatible or underpowered charger, a corrupted battery driver, heat, or a worn battery. What the laptop is doing narrows it down:
- Stuck at a fixed percentage: a charge-limit setting (table above).
- Stuck at 0% or low, but runs on the charger: an unrecognised charger, a worn battery or the charging circuit.
- "Charging slowly or discharging": Microsoft says the charger does not meet the PC's needs. See the USB-C section.
- Flicks between plugged in and on battery: a loose plug, a damaged cable or a worn port.
If the message survives a restart and a second charger, it is a hardware fault.
Check battery wear with the Windows battery report
The Windows battery report shows how much charge your battery holds now compared with when it was new. Microsoft documents the powercfg battery report command.
- Right-click the Start button and open Terminal or PowerShell.
- Type
powercfg /batteryreportand press Enter. - Open the HTML file it saves in the current folder.
Compare design capacity (when new) with full charge capacity (now). Divide one by the other: 30,000 mWh out of 50,000 mWh is 60% of the original. There is no official cut-off; HP says a significant gap means the battery has degraded. Well under design capacity, with short run times, means a new battery (from $179), not a charger.
Dell "AC power adapter type cannot be determined" and the centre pin
This Dell message means the laptop cannot identify the charger, so it may run but refuse to charge the battery. The full wording is "The AC power adapter wattage and type cannot be determined", and the BIOS lists the adapter as "Unknown". Dell adapters carry a small memory chip that tells the BIOS their model and wattage. Without that ID, Dell says the battery may not charge and the processor may be slowed.
The ID signal travels on the thin centre pin of the plug (reported by tech press GIGAZINE). So a bent or broken centre pin, a broken wire in the charger cable, a damaged DC jack or a fault in the board's ID circuit all give the same message, which matches Dell's list of usual causes: adapter, DC-in port, motherboard.
Next step: try another genuine Dell charger of the right wattage. If the message goes, replace the charger. If it stays, it is the DC jack (from $189) or the board's ID circuit (from $329).
HP says its Smart adapters use "smart-pin technology" but does not say how it works, so test with a second HP charger first.
USB-C laptop not charging: wattage, voltage and cables
A USB-C laptop charges properly only when the charger and cable can supply the voltage and wattage it asks for. USB-C laptop chargers use USB Power Delivery (USB PD), a handshake in which laptop and charger agree a voltage: 5V, 9V, 15V or 20V. A charger must offer every lower step, so a 60W charger supplies 20V, 15V, 9V and 5V, each at 3A.
- Up to 60W: 20V at 3A, on an ordinary cable.
- 60W to 100W: 20V at up to 5A. Over 3A needs an electronically marked ("e-marked") cable, which has a chip that tells the charger it can carry 5A.
- Over 100W: USB PD 3.1 added 28V, 36V and 48V for 140W, 180W and 240W. Charger and cable must both support it; certified cables carry a 60W or 240W logo.
- No USB PD: plain USB-C gives 5V at 3A, or 15W.
Phone chargers: if a charger cannot supply what the laptop asks for, Windows can show "To speed up charging, use a higher-watt charger", or, if it is too weak to charge at all, "Use the recommended charger and cable, and make sure it's directly plugged in".
Rule of thumb: use a USB PD charger rated at least as high as the original, with a matching cable, and try each USB-C port (Dell notes not every one takes power). If that fails, suspect the port or the PD controller.
Enter the wattage printed on your laptop's original charger and on the USB-C charger you are using now. If the second number is lower, expect slow charging, or none at all while you work.
A rule of thumb, not a guarantee: some laptops refuse chargers below a set wattage.
Laptop charging port loose or charges only at an angle
If the plug feels loose, or the laptop only charges at an angle, the DC jack or USB-C port is worn or its joints have cracked. HP lists a loose or damaged port as one of the most common reasons a laptop won't charge. Look for:
- A charging light that flickers when you touch the plug.
- A plug that drops out, or a USB-C plug that wobbles.
- A bent, pushed-in or missing centre pin in a barrel jack.
- Fluff in the port (Dell suggests compressed air).
- Buzzing, heat or a burnt smell: stop using it. Dell treats buzzing as a possible electrical failure.
Some laptops have the jack on a short cable that plugs into the board (Dell's Inspiron 1564 manual shows this), the simpler swap. Others have it soldered on (iFixit's ASUS VivoBook S200E guide), which means desoldering. More on charging port repair.
Charging circuit faults on the motherboard
If a good charger and a good port still don't charge the battery, the fault is likely in the motherboard's charging circuit.
- Input MOSFETs (small power switches) let charger power onto the board. A failed one can stop all charging.
- Charger IC (the chip that controls charging) sets the current into the battery. If it fails, the laptop may run on the charger but never charge.
- USB-C PD controller (the chip that runs the USB PD handshake). If it fails, USB-C chargers may be ignored.
- Adapter ID circuit on Dell barrel-jack laptops, which reads the centre pin.
We measure along the power path, find the failed part and replace it under a microscope. From $329, with a timeframe given with the quote; see board-level repair.
Swollen laptop battery: stop charging it
If the case bulges, the touchpad lifts or the laptop rocks on a desk, the battery may be swollen: stop using and charging it. Dell says to disconnect the charger, never crush, drop or puncture the battery, and not to try to free one that is stuck. HP says swelling, cracking or leaking means replacing the battery straight away. A battery is from $179; damage to the case, keyboard or touchpad is quoted after diagnosis.
Laptop charging repair cost
Charging repairs start from $189 for a port or DC jack, $179 for a battery and $329 for a charging-circuit fault on the board. Ring 02 8428 9224 with the make and model for free phone advice.
| Repair | From | Covers |
|---|---|---|
| Charging port / DC jack | $189 | DC-in cable, soldered jack or USB-C port |
| Battery replacement | $179 | Worn or swollen battery |
| Charging circuit on the motherboard | $329 | MOSFETs, charger IC, PD controller, Dell ID circuit |
The final price depends on model and part. A hands-on diagnostic is $150, waived if you go ahead; if the laptop isn't worth fixing, you pay the $150 and we tell you why. Repairs carry a 12-month warranty on parts and labour, covering the same fault. Some jobs can be done the same day when the part is in stock.
Still under the maker's warranty, or new enough for an Australian Consumer Law claim? Try the retailer or maker first. Drop-off is by arrangement near Castle Hill, Monday to Saturday, 8am to 6pm: ring first for the details. MacBooks: see Mac repairs.
Questions
Why is my laptop plugged in but not charging?
Usually a charge-limit setting, a weak or unrecognised charger, a worn port or battery, or a charging-circuit fault. Check for a fixed stopping percentage, then try a known-good charger.
Why does my laptop stop charging at 80% or 60%?
A battery-care setting is on, such as ASUS Balanced Mode (80%), HP Battery Health Manager (80%) or Lenovo Conservation Mode (55% to 60%). Turn it off in the maker's app or BIOS.
Can I charge my laptop with a phone charger?
Only a USB-C PD charger that supplies the voltage and wattage the laptop needs. A low-watt one may charge very slowly or not at all.
Is it safe to keep using a laptop with a loose charging port?
Not for long. A moving jack can crack its joints and lift the board pads; stop at once if it buzzes, smells burnt or gets hot.
Should I leave my laptop plugged in all the time?
If you do, use a charge limit. ASUS recommends its 60% mode for laptops always on AC power, and HP its 80% setting for laptops kept plugged in.
How much does it cost to fix a laptop that won't charge?
From $189 for a port or DC jack, $179 for a battery and $329 for a board repair. Ring 02 8428 9224 for free phone advice; a hands-on diagnostic is $150, waived if you go ahead.
Are you the computer store at HomeCo Castle Hill?
No. Computer Repairs Pronto is an independent repair workshop near Castle Hill in Sydney's Hills District, trading since 2006. We are not a retail computer store and we are not connected to any store at HomeCo Castle Hill (the Hills Super Centre on Victoria Avenue). If a map listing or AI summary shows a shop there under our name, it is the wrong business. Call us directly on 02 8428 9224.
Get a quote
Tell us the brand, model and what it is doing. We reply with the likely cause and a starting price before you bring it in.
Related pages
- Laptop charging port repair: DC jack, DC-in cable and USB-C port repair from $189.
- Laptop motherboard repair: Charging circuit, MOSFET and PD controller faults from $329.
- Laptop won't turn on: When there is no sign of power at all, even on the charger.
- Laptop repairs: Battery replacement from $179 and other PC laptop repairs.
Not sure what is wrong?
Ring us with the make, model and what it is doing. Phone advice is free. If it needs the bench, the $150 diagnostic is waived when you go ahead.
02 8428 9224