Laptop Not Turning On — Dead Laptop Diagnosis & Repair
Completely dead laptop with no lights or fan? We trace the power sequence rail by rail and repair the actual failure point.
A laptop that shows no sign of life feels like the worst possible fault, and it is very often one of the cheapest. 'Completely dead' covers everything from a failed ₹600 adapter to a shorted power rail on the motherboard, and there is no way to know which without measuring. That is why the diagnosis is a flat ₹350 rather than a percentage of a guess — and why it comes straight off your bill when you go ahead, so finding out costs you nothing on a job you approve.
What we will not do is guess. A no-power fault has a defined sequence of causes, and each can be tested for in order: adapter output, DC jack continuity, input fuse, always-on rails, embedded controller, power-on signal, CPU core rails. Working through that list takes under an hour on the bench and tells us precisely where the sequence stops.
The technical detail, if you want it
It helps to know what 'turning on' actually involves. When you press the power button, the laptop does not simply connect the battery to everything. There is an ordered sequence: the input voltage is checked, a couple of always-on low-voltage rails come up to power the embedded controller, the controller sees the button press, it asserts a power-on signal, the main rails come up one at a time in a defined order, the clock generator starts, reset is released, and only then does the CPU begin executing code.
If any step in that chain fails, nothing happens — and because the failure is silent, every different cause looks identical from outside. Our approach is to power the board from a bench supply and watch the current draw. A dead short pulls large current at zero volts and points straight at a failed capacitor or MOSFET. Zero current usually means an open input — a blown fuse or a broken jack. A small, stable current that never progresses points at the embedded controller or the power-on signal chain.
From there it is measurement against the schematic, and the fix is usually one component. It is also worth saying that a meaningful proportion of 'dead' laptops we receive are not dead at all — a failed adapter, a completely flat battery that needs a forced reset, or a stuck power sequence that clears with a power drain. Those cost nothing to establish and we do not invent faults where none exist.
How we carry out this repair
Every stage is documented and you see photographs of the actual fault before you approve any work.
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Step 01
The free simple checks first
Adapter output measured, DC jack continuity checked, battery isolated, and a forced power drain performed. A genuine share of "dead" laptops are resolved right here at no cost.
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Step 02
Bench supply current signature
The board is powered from a controlled supply and the current draw measured. Short, open or stalled — each has a distinct signature and it narrows the fault immediately.
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Step 03
Input stage verification
Input fuse, protection circuitry and the first-stage regulator checked in sequence against the schematic for your board revision.
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Step 04
Always-on rail testing
The low-voltage rails that power the embedded controller are verified, since the sequence cannot even start without them.
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Step 05
Power-on signal chain
Power button continuity, the controller's power-on assertion and the enable lines for each main rail are traced in order.
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Step 06
Core rail and clock check
CPU core rails, clock generator output and the reset line are measured to confirm where the sequence actually stops.
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Step 07
Component-level repair
The failed component is replaced under the microscope with the board preheated, and the full sequence retested from the beginning.
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Step 08
Extended verification
Repeated cold-start testing over 48 hours, because intermittent power faults commonly return only after the board has fully cooled.
Options and prices
Where more than one approach solves your fault, we quote all of them and explain the trade-off. The cheapest option that genuinely works is always on the list.
| Option | Price | Notes |
|---|---|---|
| Adapter replacement The most common and cheapest resolution. | ₹800 – ₹2,400 | The most common and cheapest resolution. |
| Power drain / reset (no fault found) Where the sequence was simply stuck and clears with a reset. | Free | Where the sequence was simply stuck and clears with a reset. |
| Input fuse replacement After a voltage spike, with the cause investigated. | ₹600 – ₹1,200 | After a voltage spike, with the cause investigated. |
| DC jack repair Where the input connection is broken at the socket. | ₹900 – ₹2,400 | Where the input connection is broken at the socket. |
| Power rail component repair Shorted capacitor, MOSFET or regulator on a main rail. | ₹1,500 – ₹3,500 | Shorted capacitor, MOSFET or regulator on a main rail. |
| Charging IC / EC-level repair Deeper board faults in the controller or charging circuitry. | ₹2,500 – ₹6,500 | Deeper board faults in the controller or charging circuitry. |
Prices are indicative ranges. Your exact figure is confirmed in writing after the ₹350 bench diagnosis, and it does not change afterwards.
Advice from our bench
Some of this reduces the amount of work we get. We would still rather you knew it.
Before assuming the worst, try a different known-good charger. A failed adapter is the most common cause of a completely dead laptop.
Try a forced power drain: disconnect the charger, remove the battery if removable, and hold the power button for thirty seconds.
Check that the wall socket and extension board actually work — it sounds obvious and it is occasionally the answer.
If you smell burning, do not keep trying to power it on. Each attempt can extend the damage.
Do not let anyone quote a motherboard replacement without showing you a measured fault. Ask what current the board draws.
Laptop Not Turning On (No Power) in your area
Free doorstep pickup across all four belts. Each area page covers local response times and the faults we see most often there.
Related repairs
- Data Recovery Service Deleted files, formatted drives, dead disks, RAID arrays and failed SSDs — recover... ₹1,500 – ₹28,000
- Laptop Charging Port & DC Jack Repair Charging only at a certain angle, loose socket, or charging stopped entirely — por... ₹900 – ₹3,800
- Laptop Motherboard Repair Chip-level board repair with a microscope, rework station and boardview schematics... ₹1,500 – ₹9,500
- Laptop Water & Liquid Damage Repair Spilled tea, water or juice? Emergency same-day intake, ultrasonic board cleaning,... ₹1,200 – ₹7,500
Customers who had this repair
“My Omen was shutting down mid-game and two shops told me the graphics card had failed. These guys measured the temperatures first, showed me the graph, and it turned out the heatsink was completely blocked. Full clean and repaste, temperatures dropped by around 20 degrees, and it has been stable for four months. They saved me from buying a card I did not need.”
Rohit Pednekar
Global City, Virar West · HP Omen 15
Laptop Overheating & Fan Repair
“The service centre quoted me ₹16,500 for a new motherboard. I brought that quote here and they opened it under a microscope, photographed the burnt component and repaired it for ₹2,800. They also showed me why my charger was causing it. Three months on, no problems at all.”
Ayesha Shaikh
Achole Road, Nallasopara East · Dell Inspiron 15
Laptop Motherboard Repair
“Our parish office computer stopped working and we were told to buy a new one. They came out, found it was the power supply, replaced it for a small amount and also set up backups for our records which nobody had ever done. Very patient in explaining everything. We now have them on a yearly arrangement.”
Fr. Anthony D'Mello
Papdy, Vasai West · Church office desktop
Desktop Computer Repair
Laptop Not Turning On (No Power) — your questions answered
My laptop is completely dead. Is it definitely the motherboard?
How much will it cost to fix?
Can I get my data if the laptop cannot be repaired?
Is the ₹350 diagnosis worth it for a dead laptop?
The fan spins for a second and then stops. What does that mean?
How long does the diagnosis take?
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6 min readBook a ₹350 bench diagnosis for your laptop not turning on (no power)
We collect from your door free of charge, diagnose on our bench for ₹350 and send you an itemised written quote. Approve it and the ₹350 comes off your bill.
- ✓ ₹350 diagnosis, credited to the repair
- ✓ Free pickup & drop
- ✓ Written quote first
- ✓ No repair charge if we cannot fix it
- ✓ Up to 12-month warranty