Laptop won't turn on? Nine checks before you pay for a repair

"It was fine yesterday and now nothing happens." We hear it every week, and the cause ranges from a frayed charger tip to a shorted power rail on the mainboard. The good news: a decent share of no-power laptops are fixed without parts at all.

Run through the list below. If nothing changes by step nine, the fault is almost certainly inside the machine and needs proper diagnosis with a bench supply and thermal camera.

1–3: Power delivery, the most common culprit

• Try a known-good charger of the correct wattage. A 30W phone brick will not wake a 65W laptop, and USB-C cables that only carry data are a classic trap.
• Check the barrel or USB-C port for wobble, burnt smell or blackening. A loose port that charges only at one angle is a repair, not a cable problem.
• Look for a charge LED. No LED with a good charger points at the port, the charging circuit or a dead battery board.

4–6: Draining residual power and eliminating peripherals

• Hold the power button for 30 seconds with the charger unplugged to clear residual charge, then reconnect power only and try again.
• Unplug every dock, USB drive, SD card and external monitor. A shorted peripheral can hold a machine in protection mode.
• On removable-battery laptops, run on mains with the battery out. A swollen or shorted cell will stop a healthy laptop booting completely.

7–9: Is it really dead, or just dark?

• Listen and feel for fan spin or drive activity, and shine a torch at an angle across the screen. If you can see a faint desktop, the backlight or display cable has failed — not the laptop.
• Connect an external monitor via HDMI or USB-C. A picture there means the machine boots fine and the fault is in the panel, cable or hinge routing.
• Watch for a fan spin that stops after two seconds. That short-cycle behaviour usually means RAM, storage or a board-level power fault.

What we do on the bench

In the workshop we power the board from a lab supply and watch the current draw. A board pulling nothing is a dead power rail; a board pulling a heavy constant current has a short we can trace and lift. From there it's the usual suspects: charging ICs, blown fuses, damaged DC jacks, liquid corrosion under the keyboard, failed SSDs and dying batteries.

Because we do board-level microsoldering in-house, we can often repair the machine other shops write off as "motherboard failure" — and if it isn't economic, we'll say so and quote a data transfer to your next machine instead.

MacBook specifics

• Liquid damage spreads through the trackpad and keyboard ribbons quickly — get it powered down and in to us the same day, uncharged
• "No backlight but boots" is very often the backlight fuse or a damaged display flex, both repairable
• SSD is soldered on most modern models, so a working machine is your best chance of recovering data — don't keep power-cycling it
• Battery service indicators and swelling are safety issues; stop using the machine until the cell is replaced