[SOLVED] I'm looking for LG G Pad 10.1 repair guide or schematics (free) - Phones & Tablets Forum

Hi,

I'm hoping you can help me out with my LG G Pad 10.1. 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.

@Karolina

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 G Pad 10.1 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://xdaforums.com/t/q-possibly-new-exploit.3098326/
Take a look at comment #633
Also, this : https://www.ifixit.com/Answers/View/688454/%22a%22+key+on+my+keyboad+keeps+on+typing+automaticaly.
You can also check this video starting from minute 1:

The LG G Pad 10.1 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 G Pad 10.1 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 G Pad 10.1 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 G Pad 10.1 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/Answers/View/926548/%D9%84%D9%85%D8%A7%D8%B0%D8%A7+%D9%84%D8%A7+%D9%8A%D8%B4%D8%AD%D9%86+%D8%A7%D9%84%D8%AC%D9%88%D8%A7%D9%84

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

Look for corresponding bent marks, scratches, or corrosion on these pads. Ensure it sits flush and covers the entire sealing surface without any wrinkles or gaps. Ensure each connector is perfectly aligned and seats with a gentle click or firm, even pressure. Avoid excessive adhesive that could impede future repairs or block acoustic ports. Settings Menu: Some Android devices have a basic "Calibrate proximity sensor" option under Display, Accessibility, or Advanced settings. Distinguishing between a network problem, a phone hardware issue, and environmental interference is key to diagnosis. A smartphone stuck on the manufacturer logo is a daunting problem, but it's often fixable. Place probes: Place one probe of the multimeter on each end of the suspected fuse. Reballing Stencil: A thin metal mask with holes precisely matching the BGA chip's pad layout. Logic Board Components: Issues with the charging IC (Integrated Circuit) on the main board. Articulating arm stands offer the ultimate in maneuverability, enabling precise positioning and adjustment. Align it precisely over the pads on the logic board, ensuring its orientation matches the original (this is where your reference photo helps). Grounding Screws: Ensure all screws, especially those that secure grounding points or shields, are present and properly tightened. Audio IC: No sound, speaker/microphone issues, or audio accessory problems often point to the audio IC. For internal haze, where condensation or debris is trapped within the lens assembly, professional repair is usually required. Even clear protectors can block IR light if not perfectly transparent in the sensor's area. The longevity and performance of a smartphone are intrinsically linked to the health of its battery. The Proper Alignment Techniques for Reinstalling a Smartphone Motherboard Pressing: Once aligned, gently press the new bump into place, applying even pressure around its edges to ensure the adhesive adheres properly. A failing internal storage chip (eMMC or UFS), bad memory sectors, or even a faulty CPU could intermittently corrupt data as it's being written or read, leading to system file damage. Microscope (Stereo Microscope, Professional Grade): Absolutely indispensable for precise work on tiny BGA chips. Consult online forums or professional repair guides for your specific model to determine if calibration is needed and how to perform it. Perform a general visual sweep of the entire logic board under magnification. Instead, gently lift and slightly adjust the motherboard's position until the alignment is perfect. Also note if it supports technologies like VoLTE (Voice over LTE), Wi-Fi Calling, and Carrier Aggregation. It demands a systematic approach, moving from basic external checks to intricate board-level measurements with schematics and specialized tools. Flex Cables: Often a part of a larger flexible printed circuit board (FPC) that runs along the device's frame or back cover. (However, some phones might still use the main mic for speakerphone, or combine input from multiple mics). Regular training and a culture of safety are essential for responsible IPA usage.## 3. Component Manufacturer Websites: For generic ICs, data sheets can often be found directly from the chip manufacturer (e.g., Qualcomm, Broadcom, Texas Instruments).

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