Workshop Technical Posts

ECU Diagnostics Beyond the Scan Tool: Bench Testing a SYM Citycom 300i ECU A 2009 SYM Citycom 300i scooter recently came into our workshop with an unusual fault. The scooter had been stolen and recovered after an attempted hotwire. Although the engine would crank normally, it would produce only one spark before the ignition stopped […]

Two Steam Decks, Two Very Different Board-Level Repairs We recently had two identical Steam Deck LCD models in our workshop at the same time. Although the devices looked the same from the outside, they had completely different faults. One Steam Deck powered on but had no image on its built-in screen. The other had severe

We recently received an unusual automotive electronics module for repair: an N2MB Racing WOT Box. Unlike a typical phone, tablet, or laptop repair, this device is used in performance vehicles. A WOT Box is an aftermarket control module designed for features such as no-lift shifting and launch control, helping drivers manage ignition cut and throttle-related

We recently completed an iPhone 16 screen replacement for a customer with a damaged display. This repair involved carefully opening the device, removing the damaged screen assembly, and fitting a replacement screen to restore the phone’s appearance and usability. In the first photo, the iPhone 16 is shown with the screen removed, giving a clear

The local garage gave us this job yesterday. Triumph T120 instrument cluster consistently blowing the fuse. Usually, the instrument cluster itself is not the first thing I’d blame. A fuse blowing usually means a short to ground or overcurrent on that circuit. The most likely causes are: Chafed or stretched loom near the headstock /

iPhone charging port repair is very common, we see at least two or three per day in each shop. This particular iPhone 16 Pro was showing a “moisture detected in charging port” warning and would not charge properly. After opening and inspecting the phone, we did not find any visible moisture inside, but the charging

We now have a range of protective iPad cases for sale at Device Repair Guy. These cases feature a clear protective back, foldable front cover, built-in stand function, and Apple Pencil holder/slot on selected models. They are great for everyday use, study, work, travel, watching videos, drawing, and keeping your iPad protected from bumps and

Nintendo Switch HAC-001 Battery Replacement Today in the workshop we completed a battery replacement on a Nintendo Switch HAC-001. The customer’s Switch had a battery issue, so our technician opened the console, removed the rear housing, disconnected the original battery and installed a replacement battery. After fitting the new battery, the console was reassembled and

Professional Graphics Card Diagnostics & Board-Level Repair Directly from our technician, here is the current capability we have for Graphics Card Repair. We are constantly increasing our capability in this growing field so please do contact us about your card fault so we can give up to date advice. Is your graphics card crashing, overheating,

Ford EcoSport TCM/TCU Repair – Finally Getting CAN Traffic on the Bench Ford EcoSport transmission control module faults can be frustrating, especially when the vehicle has already had mechanical transmission work completed and the usual relearn/adaptive procedures still do not resolve the issue. We recently worked on a Ford EcoSport TCM / TCU, part number

At Device Repair Guy, we carry out component-level repair of Toyota electric power steering units rather than defaulting straight to full module replacement. The unit shown here is a Toyota 89650-12340 electric power steering module with JTEKT, Denso, and EPS12V markings, making it a good example of the type of EPS control unit we inspect

Another successful repair completed by the team at Device Repair Guy. This time, we recently carried out both a screen replacement and a back glass replacement on an iPhone 17 that came in with significant damage. The damage As the photos show, the phone had a badly damaged display as well as a cracked rear

We recently repaired an engine ECU (ECM) from a 2013 Volvo XC90 3.2 (P3 platform) with a charging system fault affecting the smart alternator LIN communication line. This post explains the symptoms, diagnostics, bench testing results, and the ECU repair carried out — helpful if you’re seeing “generator communication” faults, charging warnings after start-up, or

If you’ve got a Toyota/Lexus running the 1UZ-FE V8 (often found in models like the LS400, Soarer, Crown, etc.), you’ve probably heard the stories: random running issues, weird intermittent faults, or an ECU that just seems “possessed.” We’ve now seen multiple Denso 1UZ-FE ECUs come through with the same root cause: leaking electrolytic capacitors that

MacBook Water Damage: What to Do (and What Not to Do) Today we had a 14-inch M4 MacBook Pro come in for inspection after the customer accidentally spilled water over the keyboard. This happens more often than people think — and what you do in the first few minutes can be the difference between a