Samsung Galaxy S25 dead or refusing to turn on?
A device that died suddenly needs a different fault history from one that slowly lost charge. We assess power, charging and signs of start-up before explaining the available repair route.
The fixed £35 diagnostic covers the assessment described below and both-way UK tracked shipping. If you approve the repair quote, the fee is deducted from that quote. No repair work starts without your approval.
Model-specific context
Confirm the standard S25 and the sequence of events
This page covers the standard Galaxy S25, rather than the S25+ or Ultra. Include the complete name or model code when booking, plus whether the phone stopped while charging, during use or after a drop. Samsung's S25 family has distinct devices; a component fault recorded on another variant is not a diagnosis for yours.
For the wider fault pattern, read the Dead phone assessment. If the files matter more than returning the device to daily use, read about data recovery and select Data recovery when booking.
The symptom
What was the last sign of life?
Include any brief response even if the phone now seems fully dead:
- No reaction to normal charging or the power button
- A short vibration or logo appears, then the device stops
- The phone becomes warm without reaching the lock screen
What the diagnostic checks
What we check on your Samsung Galaxy S25.
- Measure power draw and charging response under controlled conditions
- Separate a battery or display issue from a device that cannot start
- Inspect the original board and isolate faults justified by the measured behaviour
We’ll explain what we find in writing and quote for the work we can offer. Your options depend on the device’s condition, our test results and the parts available.
Before you post it
Protect the device and the data while deciding.
- Stop trying to power a hot, damaged or wet phone
- Note previous battery, screen or port work
- Avoid a factory reset or software reflash when local data is important
Get a clear diagnosis for your Samsung Galaxy S25.
Tell us what’s happening with your Samsung Galaxy S25. We’ll assess it at our Tyneside lab for £35 and explain your options before you decide on repair.
Original-board diagnosis comes before a replacement decision
A replacement main board is not a way to retrieve files stored on the original one. Repair viability and authorised data access depend on the original device condition. The assessment establishes the options before a quote.
Common questions
Samsung Galaxy S25 no power FAQ
Is a dead S25 always a battery fault?
No. Charging, display and board faults can also make it appear unresponsive. The assessment checks the evidence before recommending parts.
Can this page diagnose an S25 Ultra too?
The symptom may look similar, but the Ultra is a different model. State the full variant and use the general phone assessment route if your exact fault is not listed.
Can you recover files by fitting a different main board?
Replacing the board does not transfer the data from the original board. Select Data recovery if accessing those files is the priority; viability remains device-specific.
Related services and guides
More help with this fault.
Model information: Samsung Galaxy S25 family specifications. These sources describe the device or manufacturer guidance; the assessment establishes the fault in yours.
BASED IN TYNESIDE · SERVING THE UK
Specialist repair by post across the UK.
You can send your device to our Tyneside lab from anywhere in England, Scotland, Wales or Northern Ireland. Book first and we’ll email your tracked postage label and packing instructions. Our service is by post; there is no walk-in counter.
The £35 assessment includes standard UK tracked postage both ways. We’ll explain what we find in a written report and give you a quote. You decide whether to go ahead. The assessment is non-refundable and counts towards approved work. Read the assessment fee terms and packing instructions, or ask us about your device if you’re unsure where to start.