Laptop won't turn on — how to diagnose it in 5 minutes

Start at the wall and work in. Many 'dead' laptops just aren't getting charge.

• Check the charger's LED/light and try a different wall socket
• Let it charge for 30 minutes before testing — a flat battery can be slow to respond
• Try a different charger if you can (the right wattage matters, especially on USB-C)
• Inspect the cable and port for damage, bent pins or burn marks

Listen and look closely. If you hear fans spin, see keyboard backlight or a charging light, or feel it get warm, the laptop is powering on — the problem is the display, backlight, or graphics, not the whole machine.

Plug in an external monitor. If the picture appears there, your laptop is fine and the fault is the screen or its cable — a far cheaper repair than a board.

If there's no light, no fan and nothing on an external monitor, you're looking at power delivery or the board itself.

• Hold the power button for 10–15 seconds to force a restart
• Try a different known-good charger (a failed adapter mimics a dead laptop)
• Recall any liquid spill or power surge — both commonly kill the board

On a MacBook, do a power cycle: hold the power button ~10 seconds, release, wait, then press again. Make sure you're using an adequate-wattage charger. No startup chime, no Apple logo and no fan usually means power-management or board territory rather than a simple software issue.

On a Windows laptop, a 'power drain' often helps: unplug, remove the battery if it's removable, hold the power button 30 seconds, then reconnect and try. If it boots to a logo then dies, that's different from no-power-at-all and points more at storage, RAM or software.

Liquid damage, power surges and failed charging ICs need micro-soldering, not a parts swap. iTweak does chip-level laptop and MacBook board repair on ESD-protected benches with microscopes and thermal imaging — work many service centres won't attempt.

We diagnose first and show you the fault before quoting, give you a digital invoice with warranty details, and offer free insured pickup across India if you can't visit a centre.