Microsoldering in Montreal

When nobody else can fix it, microsoldering often can. At Sub Tech Repairs, 757 Rue Beaubien Est, we do microsoldering and board-level repair on phones and consoles in Montreal — a service few shops offer. Free diagnosis, a clear quote before any repair.

What we fix with microsoldering

Charging ICs, backlight circuits, PS5/Xbox HDMI ports, boards that won’t power on, and filters or components knocked off after a drop or liquid damage.

Why it’s worth it

Board repair can bring back a device declared “dead” elsewhere — and often makes it possible to save your data. Completed repairs are covered by our 1-year warranty.

Devices

iPhone, Samsung, PS5, Xbox and more. See also data recovery in Montreal.

The symptoms that usually point to the board

Most repairs replace a part. Board-level work is different: the fault is a component on the logic board itself, often smaller than a grain of rice. These are the symptoms that usually send a device to the microscope rather than the parts drawer:

• No power at all — no logo, no vibration, nothing on a known-good charger. Often a power-management or charging circuit.
• Boot loop — the logo appears, disappears, repeats. Frequently a failed memory or power rail.
• Charges only at a certain angle, or still won’t charge after a port replacement — the port is fine; the traces feeding it are not.
• No backlight — hold a flashlight to the screen and you can just make out the image. That’s a backlight circuit fault, not a screen fault.
• No signal or no Wi-Fi after a drop or a spill — the antenna circuit or its controller has lifted from the board.
• Touch works but the display is dead, or the reverse — when a new screen didn’t fix it, the controller on the board is the suspect.
• Runs hot and drains while idle — a shorted component pulling current it shouldn’t.

One pattern is worth knowing: if a shop has already replaced the obvious part and the fault survived, that is the clearest sign the problem was never in that part.

What board-level repair actually involves

There is no mystery to it — it is equipment, schematics and patience:

1. Inspection under a stereo microscope. We look for corrosion, lifted components and burnt traces before anything is powered on.
2. Measurement instead of guesswork. Current draw on a bench supply, read against the board’s schematic, tells us which rail has failed — narrowing a whole board to a single component.
3. Component-level replacement. Hot air, flux and a fine-tip iron to lift the failed part and fit a new one, often a chip a couple of millimetres across.
4. Trace repair where it’s needed. Corrosion eats the copper pathways between components; those get rebuilt by hand under magnification.
5. Verification before it leaves. The device is reassembled and run through a full boot, charge and signal cycle.

Why most shops don’t offer this

Board-level repair needs a microscope, a bench supply, schematics, and a technician who has spent years learning where the limits are. Most repair counters — and manufacturer service programmes — are built around swapping whole modules instead. That is faster for them, and it is why unrepairable so often turns out to mean not repairable by replacing a module.

That gap is the reason this service exists. If you have already been told a device is beyond help, a second opinion costs nothing here — the diagnostic is free and carries no obligation.

What we’ll tell you honestly

Board-level repair is skilled work, not magic, and some boards do not come back. Severe liquid corrosion left untreated for weeks, a physical fracture across the board, or an earlier repair attempt that tore away the pads a component needs to sit on — these are real limits. When a board is in that condition we say so at the diagnostic stage, before you have committed to anything.

And when what you actually need is the contents rather than the device, that is a different job with a different goal — see data recovery in Montreal. Every repair we do complete is covered by our 1-year warranty. We’re at 757 Rue Beaubien E, one minute on foot from Beaubien metro, open Monday to Sunday, 8:30 a.m. to 9 p.m.