Microsoldering & logic board
Logic board repair at chip level: no power, no charge, no image, boot loop.
iPhone repair
iPhone repair in Barcelona: battery, screen and Face ID
Cracked screen, a battery that no longer lasts the morning, a phone that won’t charge or one that took a swim. We look at it, tell you exactly what’s wrong and what it costs, and you decide. We’re at Fontanella 14, a minute from Plaça Catalunya.
4,6 out of 5 · 138 reviews on GoogleFree initial diagnosis · Fixed quote before any repair
Why BestFixing
Free initial diagnosis
We take a look at no charge and tell you what the symptom points to. If it needs opening up and measuring on the board, we tell you before we do.Fixed quote
You know the price before we touch anything. If something else shows up inside, we stop and call you.We fix what others turn down
Our own microsoldering lab: microscope, schematics and chip-level soldering instead of writing the device off.Right in the centre
Fontanella 14, one minute from Plaça Catalunya. Entrance at Carrer de les Moles, 38.
What’s your iPhone doing?
Find the symptom closest to yours: we tell you what it usually points to, what not to do in the meantime and which repair it belongs to.
7 symptoms
It won’t charge, or only charges if I hold the cable at an angle
What it usually is. Most of the time the port is packed with pocket lint and the cable never seats properly. When it isn’t that, it’s usually a worn connector or the charging line on the logic board, and you tell those apart by measuring, not by looking.
What not to do in the meantime. Don’t dig inside the port with a needle or a paperclip: the contacts are a millimetre across and bend without you noticing. And stop forcing the cable into the position that works, because every time you do you damage the pin a little more.
The screen is black but the phone still rings and vibrates
What it usually is. If calls come through and it still buzzes, the phone is alive and what has failed is whatever puts the image on screen. Usually the panel or its connector, and sometimes the backlight line on the board, which leaves a black screen on a phone that’s working underneath.
What not to do in the meantime. Don’t leave it plugged in and switched on for days hoping the picture comes back, and above all don’t squeeze or twist the frame to make contact: if a connector is loose, all you achieve is a scratched panel and more stress on the board.
It fell in water
What it usually is. Water rarely kills an iPhone on the spot: what it does is start corroding the board, and the damage keeps spreading for days. That’s why a phone that seems fine after a soaking can fail two weeks later.
What not to do in the meantime. Don’t put it in rice: it dries nothing inside and pushes starch and dust into the connectors. Don’t switch it on or put it on charge, which is what turns damp into powered corrosion, and don’t use a hairdryer, because the heat drives the water further in. Turn it off and bring it in as soon as you can.
No sign of life: no screen, no vibration, nothing on the charger
What it usually is. An iPhone that doesn’t even stir when you plug it in usually has a power problem on the logic board. Often it isn’t the battery but a component on the power-up line, and nothing can be said for sure until the current draw is measured.
What not to do in the meantime. Don’t leave it on a fast charger for hours to see if it reacts: if there’s a short circuit, those hours do more harm. And don’t open it at home to disconnect the battery, because on an iPhone that step is full of ribbon cables that tear at the first slip.
It sticks on the Apple logo or restarts over and over
What it usually is. Sometimes it’s a software problem and a reinstall settles it, but when the reinstall fails halfway or the loop comes back, there is almost always an unstable component on the board. Either way, the first job is getting what’s inside to safety.
What not to do in the meantime. Don’t restore it from a computer before you have asked someone: a restore wipes the contents, and if the fault is on the board you end up with no data and the same fault.
The battery doesn’t last the morning, or it shuts down with charge left
What it usually is. Lithium batteries age and lose capacity, and when it also shuts down suddenly at 30 % it means it can no longer deliver the current peak the phone asks for. Settings, Battery, Battery Health is the first clue.
What not to do in the meantime. Don’t buy a loose battery online for someone to fit: the ones that arrive without the original circuit trigger non-genuine part warnings and sometimes swell within a year. And if it’s already swollen, stop charging it and keep it out of your pocket.
It has lost signal, or Wi-Fi is greyed out
What it usually is. This usually shows up after a knock, a swim or a previous repair. It can be the antenna, a pinched ribbon cable or the signal amplifier on the board, and putting the SIM in another phone already rules out part of it.
What not to do in the meantime. Don’t run five restores or change carrier hunting for the fault: if the radio section is damaged, no setting will bring it back and you only lose time, and sometimes data.
We couldn’t find that symptom in the list. Tell us in your own words and we’ll get back to you.
Tell us on WhatsAppThis is guidance based on the symptom, not a diagnosis: until the device is opened and measured, nobody can tell you for certain what’s wrong. The initial diagnosis is free and the quote is fixed before we touch anything.
What we repair
iPhone screen replacement
Cracked glass, blotches, vertical lines, dead touch areas or a black screen on a phone that’s clearly on. We transfer the original flex so that Face ID and True Tone keep working.
Battery replacement
The phone shuts down at 30 %, lasts half a morning, or iOS already warns that battery health has degraded. It’s the repair that adds the most life to an iPhone that’s otherwise fine.
Not charging, or a wobbly cable
Often it isn’t the connector: it’s compacted lint inside the port, a worn cable or a fault on the charging line of the board. We check that before replacing anything.
Camera and Face ID
Blurry photos, dust inside the lens, a camera that won’t open or Face ID that refuses to set up. We tell a damaged module apart from a board-level fault, because they are fixed in very different ways.
Liquid damage
Water doesn’t break an iPhone instantly: it corrodes it. The sooner it’s opened, ultrasonically cleaned and the board inspected, the better the odds of saving it — and of saving the photos.
Cracked back glass
The back glass is bonded with cured adhesive and doesn’t simply pull off. It’s removed with a laser or controlled heat so that wireless charging and the cameras aren’t damaged.
Speaker, microphone and earpiece
People can’t hear you on calls, sound is tinny, or the earpiece has no volume. Usually the module, but it’s worth ruling out an audio codec fault on the board first.
Green, pink or flickering display after a drop
An OLED panel can be damaged internally even when the glass looks intact, or the video connector can lose contact. We check the connector and the video line on the board first: a new screen isn’t always the answer.
Running hot and draining in an hour
Abnormal current draw can come from an app, from a worn battery or from a component on the board working under strain. We measure what the phone actually draws at idle before deciding what to replace.
No signal, greyed-out Wi-Fi or dead Bluetooth
This usually shows up after a drop or a previous repair. It can be the antenna module, a pinched flex or the signal amplifier on the board, and only measuring tells them apart.
Stuck on the logo or rebooting in a loop
If reinstalling iOS doesn’t fix it, there is almost always an unstable component on the board. In these cases the first job is securing the data and only then planning the repair.
No MagSafe or wireless charging
The wireless charging coil sits under the back glass and is easily damaged when that glass breaks. We check whether the fault is the coil, the magnet array or the circuit driving it.
Buttons, haptics and sensors
A sunken volume button, a mute switch that won’t toggle, silent haptics, or a screen that stays on during calls. Usually a flex cable, but its controller on the board is worth ruling out.
Your computer doesn’t detect it when you plug it in
The iPhone charges but never appears in Finder or iTunes, or the Trust This Computer prompt never shows up. It’s usually the data line of the charging port, or the port itself dirty or damaged, and we check it with a known-good cable and port before touching anything.
The SIM isn’t read, or the eSIM won’t activate
The iPhone says “No SIM” with a card that works in another phone, or the eSIM stalls halfway through activation. We check the reader, the flex and the board line before writing off the antenna.
A bent chassis with the screen lifting on one side
After a drop, or a swollen battery, the frame is out of true and the screen no longer seats. Straightening or replacing the chassis is what stops a new screen from popping up again.
The torch and camera flash don’t work
The flash doesn’t fire and the torch is greyed out in Control Centre. Usually it’s the module itself or its power line on the board: we measure before replacing anything.
Diagnosis first, quote second
Nothing gets repaired until you know what your iPhone has and what it costs. We check it, tell you what failed, what fixing it involves and how long it takes. If you would rather not repair it, you get it back assembled.
That’s the honest way to work, and it also avoids the classic surprise of “while we had it open we found that also…”. If something appears inside that wasn’t visible from outside — typical on water-damaged phones — we stop and call you before going on.
Which part we fit
We always tell you what component we’re installing and what warranty it carries. There are several grades of iPhone screen on the market and they don’t all behave the same on brightness, touch response or battery drain. We explain the difference and you choose, with no small print.
When an iPhone is worth repairing
A battery or screen replacement on an iPhone that’s otherwise healthy nearly always pays off: it adds years of life for a fraction of the price of a new phone. The conversation changes when several serious faults pile up on an older model. In that case we say so plainly, even if it means not doing the repair.
Logic board faults: the ones others turn down
When an iPhone won’t power on, shows no image, refuses to charge at all or keeps rebooting, the problem is often not a module but a component on the board. That is where our microsoldering lab comes in: we work at chip level to recover devices that are written off elsewhere.
And if what you really want is to rescue the photos and messages from an iPhone that no longer starts, see data recovery.
What the diagnosis covers
Whatever symptom you arrive with, the first pass is always the same:
- Outside condition: a bent chassis, the back glass, marks from a previous repair.
- Charging: we test with a bench supply to see how much current the phone asks for, and inspect the port under a microscope before blaming it.
- Battery: cycle count, real capacity and behaviour under load, not just the figure iOS reports.
- Screen and sensors: touch across the whole surface, brightness, True Tone, Face ID, proximity.
- Liquid indicators and signs of internal corrosion whenever the symptom calls for it.
That initial diagnosis is free and answers the question in most cases. When the fault means stripping the phone down and measuring the board under a microscope, that’s an in-depth diagnosis: it carries a cost, and we tell you how much before we start.
Batteries: when it’s genuinely time
An iPhone that feels slow isn’t necessarily old. As the battery degrades, iOS turns on performance management and throttles the processor to avoid shutdowns; the phone gets its speed back the moment a healthy battery goes in. Before replacing one we check cycles, real capacity and idle draw, because sometimes the battery isn’t the culprit but the victim.
Liquid damage is a race against the clock
Water doesn’t break an iPhone on the spot: it corrodes it over the following days. The worst thing you can do is charge it or switch it on to see whether it still works. Power it off, leave it off the charger and bring it in quickly. We open it, clean the board ultrasonically and assess the real damage before quoting. The first hour is the one that counts.
What the 12-month warranty covers
Every repair leaves the workshop with a 12-month warranty on the part we fit and on the labour. On an iPhone that means that if the new screen loses touch response or starts showing lines, if the battery degrades abnormally, or if the charging port fails again from the same cause, we sort it out at no charge. A fresh drop or later liquid damage are different faults and fall outside it — and we’ll tell you that as plainly as we’re telling you now.
Models we work on
- iPhone 17, 17 Pro and 17 Pro Max
- iPhone Air
- iPhone 16, 16 Plus, 16 Pro and 16 Pro Max
- iPhone 16e
- iPhone 15 and 14 (all variants)
- iPhone 13, 12 and 11 (all variants)
- iPhone SE (3rd generation)
- iPhone SE, XR, XS and X
- Older models: ask us about parts availability
We’ve written separately about a few of these models, because there’s a quirk worth knowing before you repair them: iPhone 8, iPhone X, iPhone 11, iPhone 13 and iPhone 14.
How we work
Every fault is different, and the price depends on the model and the actual condition of the device. The initial diagnosis is free, and the quote is fixed before we touch anything.
- 01
Tell us about it
On WhatsApp, by phone, or just drop in. Give us the model and the symptom and we can already point you in the right direction.
- 02
We diagnose it
The initial diagnosis is free. If the symptom means stripping it down and measuring the board, we tell you what that costs before we touch it.
- 03
We give you a price and a date
A fixed quote and a real timeframe, before we touch anything. You decide whether to go ahead.
- 04
We repair and test
Repair, reassembly and testing before you get it back, with a written 12-month warranty on the part and the labour.
Reviews
4,6 out of 5 · 138 reviews on Google
5 out of 5 stars
Super recomendable! Se me rompió el cristal de una de las cámaras traseras de mi iphone 14 pro, apple me pedía 600€ y ellos en un tarde me repararon dos cristales de las 3 cámaras por 70€. Los chicos muy agradables!
Organiza tu bodaGoogle ·5 out of 5 stars
Estos chicos son increíbles, les doy 5 estrellas porque no se pueden dar más. Cariñosos, profesionales y sin duda buena gente. Ya tengo informático de cabecera :)
Berta TurnéGoogle ·5 out of 5 stars
No BS, just fair price and fast fix. I wish every city i live in has at least one of these trustable places.
Weiyi Jiang OuyangGoogle ·5 out of 5 stars
Amazing service! They saved my laptop and stayed an hour after the closing hours to finish it just so that it would be ready the same day. Amazing people and service
Duygu GGoogle ·
Frequently asked questions
How long does an iPhone screen replacement take?
Most screen replacements are done the same day if we have the part for your model in stock. We confirm the exact timeframe when we give you the quote, before you leave the phone with us.
Will I lose Face ID if I replace the screen?
Not if it’s done properly. Face ID is paired to the logic board through a flex cable that has to be transferred from the old screen to the new one. Skip that step and Face ID stops working permanently. We always transfer it.
Why does iOS say the battery isn’t genuine?
Since iOS 12, iPhones show an “Unknown Part” notice, or lose the battery health reading, when they detect a battery that wasn’t paired at the factory. It’s an informational message and the phone works normally. We explain the options before repairing.
Will I lose my data during the repair?
In ordinary repairs — screen, battery, charging port, camera — the storage is never touched and your data stays exactly as it was. Even so, we always recommend backing up before you bring it in. It’s free and saves a lot of grief.
My iPhone got wet and now it won’t turn on. Can it be saved?
It depends on how long ago and on what liquid it was, but many are recovered. What matters isn’t charging it, not trying to power it on, and bringing it in quickly — corrosion advances by the hour. We open it, clean the board and assess the real damage before quoting.
Do you repair iPhones with a damaged logic board?
Yes. We have our own microsoldering lab, so we repair board-level faults that most shops resolve by telling you the phone can’t be fixed.
What warranty does the repair carry?
12 months on the part we fit and on the labour for that repair, from the invoice date. It covers the component failing or the repaired fault returning from the same cause. It doesn’t cover a fresh drop or later liquid damage, which are different faults.
The glass is cracked but everything works. Can I wait?
You can, but it isn’t free. Dust and moisture reach the digitiser and the panel through the crack, splintered edges cut, and one small drop finishes off what was still working. The sooner it’s replaced, the lower the chance of paying for the panel too.
What should I prepare before bringing the phone in?
A backup and your passcode to hand are all we need. The passcode is what lets us test Face ID, the cameras and calls afterwards. If you would rather not leave it, we run those tests with you present when you collect the phone.
It gets hot and barely lasts. Is it the battery?
Often, but not always. Before replacing it we look at cycle count and real capacity and measure the draw with the screen off. If it draws too much while idle, the problem isn’t the battery but whatever is emptying it.
Do you repair iPhones that have already had a screen fitted elsewhere?
Yes, and it’s more common than you would think. The first step is seeing how that repair was left: screws in the wrong holes, pinched flex cables or badly applied adhesive explain a good number of faults that look brand new.
It got wet but seems to work. Can I wait a few days?
Not a good idea. Corrosion advances even while the phone is running, and it’s very common for a wet device to work for days or weeks and then fail once a trace on the board has been eaten through. Cleaning it in time costs far less.
How much does an iPhone repair cost?
It depends on the model and the part: a screen for a recent iPhone isn’t in the same bracket as one for a five-year-old handset, and a battery or a charging port is different again. Whether the fault is in a module or on the logic board matters too, as does any extra damage from a drop or a spill. The initial diagnosis is free and you get a fixed quote before we touch anything, so you decide with the figure in front of you.
Do I need an appointment or can I just walk in?
You can walk in at Fontanella 14, next to Plaça Catalunya. That said, a quick WhatsApp first saves you a trip: we check whether we have the part for your model and tell you how busy the workshop is. Send the model and the symptom and we can point you in the right direction before you leave home.
Is it worth repairing my iPhone or should I buy a new one?
With a single fault on an iPhone that otherwise works well, repairing almost always makes sense: it adds years of life for a fraction of the price of a new one. The maths changes when several serious faults pile up on a model that no longer gets updates. We give you the real figures for your case and say so plainly if we don’t think it’s worth it, even when that means not doing the repair.
My iPhone won’t charge even with different cables. What’s wrong?
The most common cause is compacted lint at the bottom of the charging port stopping the cable from seating properly. If that isn’t it, the port itself, a damaged flex cable or the charging circuit on the board could be to blame. We inspect the port under a microscope and measure how much current the phone draws on our own bench supply before replacing any part.
Other services
See all servicesData recovery
Photos and documents from dead devices, damaged drives or accidental deletion.
MacBook & iMac repair
Won’t turn on, screen, battery, keyboard, liquid damage, SSD and RAM upgrades.
Shall we take a look?
Tell us what’s wrong and we’ll tell you what it is, what it costs and how long it takes. No obligation, and the initial diagnosis is free.
4,6 out of 5 · 138 reviews on GoogleCarrer de Fontanella, 14, bajos · 08010 Barcelona — or drop by Fontanella 14, next to Plaça Catalunya