Updated 19 October 2026
A laptop that won't turn on is usually not dead: the fault is normally in the power path, meaning the adapter, the charging port, the battery or a power part on the motherboard. Try another wall socket, check the adapter and do a hard reset (brand steps below). If it still won't start, we find and replace the failed part, from $329 for a no-power board repair.
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.
Five kinds of “won't turn on” and how to tell them apart
Plug into a wall socket, press power once, and watch the lights and listen for the fan.
- No lights at all: no power or charging light, no fan. Power is not reaching the board, or the board is cutting it off.
- Charging light on, nothing else: ASUS notes that a lit indicator means the motherboard is receiving power, so the fault is past the adapter.
- Turns on, black screen: fan or keyboard light, no picture. Lenovo says a running fan suggests a display problem. Turn the brightness up first.
- Starts, then switches off: note how long it runs, and whether on the adapter, battery or both.
- Turns on, won't load Windows: a logo, then a restart loop, Automatic Repair, a BitLocker recovery screen or “no boot device”. It has power, so look at the drive and Windows.
A light blinking in a repeating pattern, or beeping, is a fault code: see the tables below.
What do you see?
No lights, no fan
- Most likely
- Power is not reaching the board: socket, adapter, cable tip, charging port, or a board short that makes the adapter cut out.
- Try first
- Another wall socket, check the adapter light and tip, then a hard reset.
- What we check
- Adapter output under load, then current draw on a current-limited bench supply.
- Cost
- From $189 (port) or $329 (board)
Charging light only
- Most likely
- Power reaches the board but it will not start: a stuck power controller, the power button or a failed rail.
- Try first
- Charge for 10 minutes, then do your brand's hard reset.
- What we check
- Current draw at the button press, and which rail fails to come up.
- Cost
- From $329
Fan or lights on, black screen
- Most likely
- The screen, its cable or backlight, or start-up stopping early on memory or graphics.
- Try first
- Brightness up, then an external monitor with Windows + P.
- What we check
- External video, screen cable, backlight power and memory.
- Cost
- From $259 (screen) or quoted after diagnosis
Blinking light or beeps
- Most likely
- A start-up fault code: memory, processor, BIOS, graphics or power.
- Try first
- Count the blinks and check the code tables below.
- What we check
- The area the code points to and the rails feeding it.
- Cost
- Quoted after diagnosis
Starts, then switches off
- Most likely
- Power failing under load (adapter, battery or a rail), a heat shutdown, or a short tripping the protection.
- Try first
- Run it on the adapter alone with the vents clear, and time how long it runs.
- What we check
- Current draw over time, rails under load, the fan and a thermal camera check.
- Cost
- Quoted after diagnosis
Logo, then Windows won't load
- Most likely
- The drive, Windows, or a BitLocker recovery prompt.
- Try first
- At a BitLocker screen, get the key from aka.ms/myrecoverykey. Do not reset Windows if you need your files.
- What we check
- Drive health, copy the data, then repair or reinstall Windows.
- Cost
- From $149
Spill, drop or burning smell
- Most likely
- Liquid or a knock can short the board or damage the battery.
- Try first
- Nothing safe to try at home: unplug it, turn it off and leave it off.
- What we check
- Clean and corrosion check, battery inspection, then current draw.
- Cost
- From $179
Safe checks to try first, in order
Rule out the wall socket, the adapter and a stuck power controller before you assume the laptop has failed.
- Wall socket. Plug straight into a working wall socket, not a power board, surge protector or dock.
- Adapter. Dell says an unlit adapter light means power is not reaching the laptop: reseat both ends, then try another adapter of the same type and at least the original's wattage.
- Tip and cable. A bent tip, frayed cable or melted plastic means stop. A plug that only works at an angle points to the cable or the charging port.
- Flat battery. Lenovo says some batteries need 10% or more before the laptop runs, so charge for 5 to 10 minutes first.
- Black screen. Connect a monitor or TV and press Windows + P. A picture there means the fault is the laptop's screen, its cable or the display driver. ASUS also suggests Windows + Ctrl + Shift + B to reset display settings.
- Hard reset. Dell explains that capacitors on the board hold leftover “flea power” after shutdown, and a hard reset drains it. Your files are not touched.
Do not open the laptop to unplug the battery unless your user guide shows how: Dell warns against prying near the battery.
Hard reset steps for Dell, HP, Lenovo, ASUS and Acer laptops
Hold times differ by brand, and some Lenovo and Acer models have a reset pinhole on the base. These steps are from each maker's support pages. Unplug USB devices and docks first. Brand pages: Dell, HP, Lenovo, ASUS, Acer.
Pick your brand
Dell hard reset
Removable battery: turn it off, unplug, remove the battery, hold the power button for 15 to 20 seconds, then refit it.
Sealed battery (RTC reset): with the adapter connected, hold the power button for about 30 to 35 seconds until the power light blinks three times. Under 25 or over 40 seconds cancels it. It resets the BIOS settings, date and time, and the laptop may restart several times. Listed Intel 8th-gen and newer models; it may be disabled when a BIOS admin password is set.
Steps from: dell.com
HP hard reset
Turn it off, unplug the adapter and remove discs, cards and USB devices. Hold the power button for about 15 seconds, then reconnect and turn on.
For Caps Lock code 2 long, 4 short, HP's embedded controller reset: adapter unplugged, hold power for more than 12 seconds, release and let it start.
Steps from: support.hp.com
Lenovo hard reset
Removable battery: unplug and take it out. Built-in battery: with the adapter unplugged, press the emergency-reset hole on the base with a straightened paper clip, then reconnect and turn on. Not every model has the hole; the bottom view in your user guide shows it. No hole: hold power for at least 10 seconds.
Some IdeaPads have a Novo button. If the laptop starts from Novo but not the power button, Lenovo says the power button may be faulty.
Steps from: pcsupport.lenovo.com
ASUS hard reset
Remove devices and turn it off. Connect the adapter, then hold power for 40 seconds. On 20-second models the power light flashes rapidly after about 15 seconds; let go when it stops.
The next start may show no picture for 1 to 3 minutes while the memory retrains. Do not force it off.
Steps from: asus.com
Acer hard reset
Battery Reset pinhole (some models; the “Your Acer Notebook Computer tour” section of the user guide shows it): with the charger unplugged, press the button inside with a paper clip for 10 to 15 seconds, then turn on. This briefly disconnects the battery.
No pinhole: hold power 10 seconds to shut down, unplug everything, hold power for at least 30 seconds, then reconnect and turn on.
Steps from: community.acer.com
Blink and beep codes on Dell, HP and Lenovo laptops
A repeating blink pattern means the laptop has power and stopped at a known start-up step. Count both groups a few times. Dell blinks the battery light (amber, then white); HP blinks Caps Lock (long, then short). Dell notes the code shows where start-up stopped, not always the failed part. On a Dell that powers on, F12 at start-up then Diagnostics runs its hardware test.
Lenovo publishes no general table. ThinkPads from 2018 on (and some 2017 models, such as the T470) use SmartBeep: a short tune on a black screen that Lenovo's PC Diagnostics app for Android decodes.
Dell battery-light codes (amber blinks, then white)
Dell's table for Inspiron laptops from 2020 to 2025; Dell's Latitude article lists the same codes from 2 amber, 1 white to 3 amber, 4 white.
| Pattern | What it points to |
|---|---|
| 1 amber, 6 white | Embedded controller (power management chip) failure |
| 2 amber, 1 white | Processor failure |
| 2 amber, 2 white | BIOS or ROM failure on the system board |
| 2 amber, 3 white | No memory (RAM) detected |
| 2 amber, 4 white | Memory failure |
| 2 amber, 5 white | Invalid memory installed |
| 2 amber, 6 white | System board or chipset error |
| 2 amber, 7 white | Screen (LCD) failure |
| 2 amber, 8 white | Screen power rail failure |
| 3 amber, 1 white | CMOS (clock) battery failure |
| 3 amber, 2 white | PCI or video chip/card failure |
| 3 amber, 3 or 4 white | BIOS recovery image missing (3) or invalid (4) |
| 3 amber, 5 white | Power rail failure in the power-up sequence |
| 3 amber, 6 white | BIOS flash corruption |
Source: dell.com
HP Caps Lock codes (long blinks, then short)
HP's general article for HP notebooks (no model list given). Long blinks are red, short are white; on a single-colour light both are white.
| Pattern | What it points to |
|---|---|
| 2 long, 2 short | BIOS corrupted, no recovery image: BIOS recovery needed |
| 2 long, 4 short | Embedded controller checking or recovering its boot block: do an EC reset |
| 3 long, 2 short | Possible memory failure |
| 3 long, 3 short | Possible graphics chip failure |
| 3 long, 4 short | Possible power system failure: check connections and adapter rating |
| 3 long, 5 short | Processor not detected: system board or CPU failure |
| 4 long, 2 short | Processor may be overheating |
| 4 long, 3 short | Room temperature may be too high |
| 4 long, 4 short | Graphics chip may be overheating |
| 5 long, 2 short | Embedded controller cannot find valid firmware |
| 5 long, 3 or 4 short | Embedded controller timed out waiting for the BIOS |
Source: support.hp.com
When not to power it on: liquid, swollen battery, burning smell or a drop
After a spill, with a swollen battery, a burning smell or a hard drop, stop trying to turn it on: each attempt can make the repair bigger, or the battery a fire risk.
- Liquid. Lenovo says to unplug it and turn it off straight away, wait until it is fully dry, and not turn it over to drain it. Liquid on a powered board is a short circuit, and the battery keeps powering the board after you unplug. Drying leaves sugar and minerals behind, so it still needs a clean.
- Swollen battery. Dell's signs: gaps in the case, a raised trackpad or keyboard, a wobble on a flat desk, a lid that won't close. Stop using it and never puncture or pry at it. The NSW Government adds: if a battery is hot, leaking, smoking or smells, move it away from anything that can burn, and call 000 for fire or smoke.
- Burning smell. A part has overheated. Unplug it; powering it again can spread the damage.
- Hard drop. If the case is cracked or bent near the battery, treat the battery as damaged.
How we diagnose a laptop that won't turn on
We measure where the power stops instead of swapping parts.
- Adapter under load, not just a meter at the tip.
- Current-limited bench supply. We power the board at the adapter's voltage with the current capped, so a fault cannot burn more parts. No current means power is not getting in (port, fuse or the input MOSFET, a small power switch on the board). High current at once means a short. Current that rises then stalls means the board starts and halts at a step.
- Power rails. A rail is a power line at one voltage feeding a group of parts. We check the always-on rails, then the ones that switch on in turn for the processor, memory and graphics. The first missing rail points to the fault.
- Thermal camera. On a shorted rail we apply a small, current-limited voltage; the failed part warms first and shows as a hot spot.
- Repair, then re-test every rail, under load and on charge.
“A short on the main rail” means one part on the line that carries adapter and battery power into the board has failed, so power runs straight to ground. The adapter's protection cuts out and the laptop looks dead, yet the rest of the board may be fine, so the fix can be one part. See laptop motherboard repair.
Your files when a laptop won't turn on
A dead motherboard does not erase your files: the drive is a separate part.
- In many Windows laptops the drive is a removable M.2 NVMe SSD (a flat stick 3 to 8 cm long) that can be read in another computer. Some thin models have storage soldered to the board; then the board must work.
- BitLocker: Microsoft says device encryption turns on automatically when a supported laptop is set up with a Microsoft account. Reading the drive elsewhere, or starting after a hardware change, can need the 48-digit recovery key, and Microsoft cannot recreate a lost one. Find it now at aka.ms/myrecoverykey, or see Microsoft's guide to finding your BitLocker key.
- Do not reset Windows if you need the files: Microsoft notes a reset removes them. See data recovery.
Cost to fix a laptop that won't turn on
The price depends on where the power stops, and you get a quote before any work starts.
| Fault found | From |
|---|---|
| Charging port / DC jack | $189 |
| Battery replacement | $179 |
| No-power / motherboard component repair | $329 |
| Liquid damage: clean and treatment | $179 |
| Liquid damage: board repair | $329 |
| Screen, standard 14 to 15.6 inch | $259 |
| Windows reinstall | $149 |
| Data recovery (basic) | $209 |
| Hands-on diagnostic (waived if you go ahead) | $150 |
Ring 02 8428 9224 for free phone advice, Monday to Saturday, 8am to 6pm. Drop-off is by arrangement at our workshop near Castle Hill, and board work gets a timeframe with the quote.
Worth fixing? Compare the quote with a new laptop that does the same job. A power fault in a laptop that still meets your needs is a good repair candidate. If it was already slow or out of updates, or the quote nears replacement cost, buy new and have the data copied. If it is not worth fixing, you pay the $150 diagnostic and we tell you why.
Under warranty or bought recently? Try the retailer or manufacturer first: under Australian Consumer Law the consumer guarantees sit with them. MacBooks: see Mac repairs.
Questions
Why won't my laptop turn on when it's plugged in?
Power is stopping between the wall socket and the board: the socket, adapter, cable tip, charging port or a part on the board. Try another socket and a hard reset; an unlit adapter light points to the adapter or cable.
Why is the charging light on but my laptop won't turn on?
The board has power but is not starting, for example because of a stuck power controller, the power button or a failed rail. Charge it for 10 minutes and do your brand's hard reset; if nothing changes, it needs a bench check.
How do I force my laptop to turn on?
Do a hard reset: hold the power button for 15 to 40 seconds depending on the brand, or use the reset pinhole on Lenovo and Acer models that have one. If power is not reaching the board, no reset will start it.
My laptop turns on but the screen is black. Is it the screen?
Not always. Connect an external monitor and press Windows + P: a picture there points to the screen, its cable or the driver; no picture points to the board, memory or graphics.
Will I lose my files if my laptop won't turn on?
Not necessarily: a board fault does not erase the drive. If it is BitLocker-encrypted, you will need the recovery key from aka.ms/myrecoverykey to read it.
My laptop got wet and won't turn on. What should I do?
Unplug it, turn it off and leave it off until it has been opened and cleaned; Lenovo says not to tip it over to drain it. Liquid clean and treatment is from $179.
How much does it cost to fix a laptop that won't turn on?
A charging port or DC jack is from $189 and a no-power board repair from $329. Phone advice is free on 02 8428 9224; a hands-on diagnostic is $150, waived if you go ahead with the repair.
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 motherboard repair: No-power and short-circuit faults fixed at component level.
- Laptop not charging: When it runs on the adapter but the battery will not charge.
- Charging port and DC jack repair: Loose or burnt DC jacks and USB-C ports, from $189.
- Data recovery: Getting your files off a laptop that will not start.
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