[SOLVED] I'm looking for LG X410AS Phoenix Plus repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my LG X410AS Phoenix Plus. It's started acting up, and I'm looking for a detailed service manual with boardviews and schematics to properly diagnose and repair it. I need to take precise voltage measurements around the board, so having the right documentation would be very helpful.

Thanks in advance for your help.

Selected Answer

I actually found that service manual on a tech Discord server a while back. A really helpful member there shared a direct link to their blog and I've saved it. I'm happy to pass it along here. Hopefully, these boardviews and schematics help you fix your phone, just like they got me through my repair. Looks like we have the same model.

@Kari

Absolute legend! That's exactly the info I was searching for. This is going to save me so much time probing in the dark. Seriously, thanks a ton for sharing the link!

Hi there,

I also have the LG X410AS Phoenix Plus and just downloaded the manual you shared. I'm pretty new to board-level phone repair, and this is a bit intimidating with all the tiny test points and the schematics. Could you point me in the right direction on how to start troubleshooting this ? Any advice on the first few things I should check would be a massive help.

Thanks so much for your time

General advices: start by checking the voltage at the battery connector on the board. With a known-good battery connected, you should see a steady voltage between 3.7V and 4.2V. After that, a great next step is to check the main power management IC (PMIC) for shorts. Using your multimeter in diode mode, check for shorts on the large input capacitors surrounding the PMIC.

Here are a few useful references for troubleshooting your device:
https://www.ifixit.com/Guide/Nespresso+CitiZ+Capacitors+Replacement/146400
Take a look at comment #1479
Also, this : https://xdaforums.com/t/lg-d802-not-booting-after-reboot.3186417/.
You can also check this video starting from minute 5:

The LG X410AS Phoenix Plus service manual and boardviews from the link above were exactly what I've been searching for. I couldn't find a complete, free copy anywhere else. Seriously, thank you for sharing this you're a lifesaver!

Hi everyone, I'm working on a LG X410AS Phoenix Plus with a no power issue and need some guidance with my measurements.
I'm detecting 3.3V on the VREG_MAIN line (pin 1 of the PMIC), which looks good, but I'm getting 0V on the VDD_CPU line (pin 8) where the schematics indicate I should see about 0.9V.
Since this is a core voltage for the application processor, could this missing rail be why the device shows no signs of life?
What's the best procedure to diagnose this further? Should I check for shorts on the CPU rail first, or look at the PMIC's enable signals?
I've already verified the main 3.3V and 1.8V power rails are present and stable.

My LG X410AS Phoenix Plus was working perfectly until yesterday when it suddenly went completely dead. Now it won't respond to the power button, doesn't vibrate, and shows no signs of life even when connected to a charger. I'm worried there might be a serious issue.

I have a decent multimeter, a basic soldering iron, and a healthy dose of patience. While I've successfully replaced iPhone batteries and charging ports, this will be my first attempt at actual diagnosis. The sheer density of BGA chips and microscopic components is honestly a bit overwhelming.

I'm particularly curious about the alcohol trick I've seen online where you apply isopropyl to the board and look for evaporation hotspots to locate shorts. Is this actually a reliable method for beginners, or are there better approaches I should try first with just a multimeter?

I learned this lesson the hard way last month with mine, it was declared "dead" by two different shops. The phone showed absolutely no signs of life - no charging indicator, no vibration, nothing. Before diving into complex board work, I decided to try one more basic test: wireless charging.

To my complete surprise, it actually heated up on the charging pad! This single discovery completely changed my diagnostic path. It turned out the issue wasn't with the main board or processor, but with the notoriously fragile USB-C port that had failed completely. A $15 replacement part and some careful soldering brought it back to life.

The moral? Always exhaust every external testing method before opening the device. Test wireless charging if available, try different charging methods, and don't assume the worst case scenario. Sometimes the most "dead" devices have the simplest solutions hiding in plain sight.

I suspect my issue might be related to that cheap, third-party fast charger I used at the airport last week... Now the device gets extremely hot during charging, the screen flickers at low brightness, and sometimes it randomly shuts down at 30% battery. Could this have damaged the power management IC or battery calibration?

If your LG X410AS Phoenix Plus starts acting up, random reboots, fast battery drain, or connectivity issues, there are several diagnostic steps you can take before assuming the worst:

• Check your charging habits: Using poor-quality chargers or wireless pads can gradually damage your battery and charging circuit, leading to unpredictable behavior.
• Inspect the physical components: A slightly damaged charging port, worn battery, or even accumulated pocket lint can cause issues that seem like major hardware failures.
• Monitor temperature patterns: If your phone gets unusually hot during specific tasks (like camera use or gaming), it could point to a failing component rather than a software issue.
• Use diagnostic tools wisely: Ampere for battery health, phone diagnostic codes (*#0*# on many models), and a thermal camera can reveal problems without opening the device.
• Know when to stop: If you see liquid damage indicators tripped or smell burnt electronics, it's time to consult a professional before causing irreversible damage.

Also visit this link it may help : https://www.ifixit.com/Teardown/Logitech+M650+L++Mouse+Teardown/180824

Here's what I discovered on forums and technical databases:

Use your fine-tipped tweezers or a plastic spudger to gently lift the old camera module out of its housing. Clean Workspace: Ensure a clean, well-lit, and anti-static environment. What to Look For: One with a grid or labeled sections is ideal for tracking different screw types. You can click on any component, and it will show its reference designator, type, and sometimes its value, linking directly to the schematic. Merely drying a wet phone is often insufficient; the lingering corrosion will continue to cause problems if not addressed. For capacitive sensors, ensure the sensor itself is free of scratches or cracks. This is a design choice, often to maintain color accuracy or efficiency at low light. Observe During Removal: Pay attention to how easy or difficult screws are to remove. LCDs are generally not susceptible to permanent burn-in but can experience temporary image retention. First, thoroughly clean the camera lens with a microfiber cloth to ensure no smudges or dirt are obscuring the lens. Air bubbles, trapped debris, or a cracked protector can mimic ghost touches. Set the hot air station to the appropriate temperature (e.g., 300-350°C for lead-free solder, adjusted for the specific board and solder alloy) and a very low, even airflow. Be mindful of any flex cables (e.g., fingerprint sensor) that might connect the back panel to the main board. Flashing Stock Firmware (Full ROM): This is the most crucial software step. Use an original cable from your phone's manufacturer or a known-good, high-quality data cable. These cloths have microscopic fibers that are much finer and softer than traditional fabrics, capable of trapping dust and oil without scratching. This prevents accidental short circuits while working on the motherboard. Pulling flex cables at an angle, forcing them, or prying components too aggressively can bend or break connector pins. Modern smartphones often feature elegant glass backs, which contribute to a premium feel, enable wireless charging, and allow for sophisticated antenna designs. If you had "Backup and restore" enabled for Samsung Secure Folder, you might see an option to restore from the latest backup within the Secure Folder settings itself, though this is usually for accidental deletion rather than minor repairs. When evaluating a smartphone for purchase, particularly a used device, detecting stuck pixels is a critical part of the inspection. Flux forms a protective barrier over the heated surfaces, preventing new oxides from forming until the solder has flowed and solidified. When a short occurs, the resistance drops dramatically, causing a massive surge of current from the power source (battery or charger). If a hardware fault is suspected and you are proficient in device repair, carefully open the phone to inspect and reseat the camera module. A shorted capacitor on a smartphone’s logic board is a common culprit behind a myriad of frustrating issues, ranging from complete power failure (no boot, no charge) to specific component malfunctions, rapid battery drain, or unexpected reboots. Standard Color Profile: In display settings, select the most "accurate" or "natural" color profile if multiple options are available. Flux left on the board can become corrosive over time or cause intermittent issues. Software Recovery: On many Android devices (especially Qualcomm-based), specific test points are used to force the device into EDL mode, which is vital for unbricking phones that won't boot normally. No internal debris (e.g., leftover screws, plastic fragments) visible through transparent parts or camera lenses. If a new screen doesn't resolve the issue, attention turns to the motherboard.

@German, Not sure what you're trying to say but ok :)