LG G5 Restart on Its Own? Fixed
Yes, the LG G5 restarting on its own is a known issue, and in most cases it can be fixed by replacing the battery, cleaning the battery contacts, or performing a software reset. This guide walks you through the most common causes and the step-by-step fixes that resolve the problem for the majority of users.
Why the LG G5 Restarts by Itself
The LG G5 was released in 2016 with a unique modular design that includes a removable battery. That design is the root of most random restart problems. Unlike phones with sealed batteries, the G5’s battery sits under a bottom chin that can be popped off. Over time, the battery contacts can become dirty or lose tension, and the battery itself can wear out. A loose connection or a failing battery causes the phone to lose power momentarily, which triggers a reboot.
Software bugs, overheating, and corrupted system files are also possible, but they are less common than hardware-related causes. If your phone restarts only when you move it or press on the chin, the issue is almost certainly physical.
Fix 1: Check and Clean the Battery Contacts
The first thing to try is cleaning the gold contact pins on the battery and the corresponding pads inside the phone. These contacts can accumulate oxidation or dust, which interrupts power delivery.
- Power off the phone and remove the bottom chin by pressing the release button on the side.
- Slide the battery out.
- Use a soft, dry cloth or a pencil eraser to gently rub the gold contacts on the battery and the metal pins inside the phone. Do not use liquids or abrasive cleaners.
- Reinsert the battery and chin, then power on and test by gently squeezing the phone.
If the contacts look corroded or pitted, you may need to replace the battery or the chin assembly.
Fix 2: Replace the Battery
The G5’s battery is a 2,800 mAh lithium-ion cell. After a few hundred charge cycles, its capacity drops and its internal resistance rises. A degraded battery can cause voltage dips that trigger a restart, even when the charge indicator shows 50% or more.
To test if the battery is the culprit, remove the battery and place it on a flat surface. If it rocks back and forth, it is swollen and must be replaced immediately. Even if it looks normal, a battery that is more than two years old is a prime suspect.
Replacement batteries are widely available online or at phone repair shops. Choose a reputable brand and make sure it is specifically for the LG G5 (model BL-42D1F). After installing a new battery, fully charge it before using the phone heavily.
Fix 3: Update or Reset the Software
If the hardware checks out, the next step is to address software glitches. Start by checking for system updates:
- Go to Settings > About phone > Update Center > System updates.
- Install any available updates and restart the phone.
If updates do not help, back up your data and perform a factory reset. This clears corrupted system files and returns the phone to its out-of-box state. To reset:
- Back up photos, contacts, and other important data.
- Go to Settings > General > Backup & reset > Factory data reset.
- Confirm and wait for the phone to reboot.
After the reset, do not restore from a backup immediately. Use the phone for a day to see if the restarts stop. If they do, slowly reinstall your apps one by one to identify any problematic app.
Fix 4: Check for Overheating and Charger Issues
The G5 can also restart if it overheats. Heavy gaming, GPS navigation, or using the phone while charging in a hot car can push the temperature past safe limits, causing an automatic shutdown that looks like a restart.
To rule out overheating, feel the back of the phone when it restarts. If it is hot to the touch, remove the case and let it cool down. Avoid using the phone while it is plugged in, and do not leave it in direct sunlight.
Using a low-quality or damaged charger can also cause voltage fluctuations that trigger restarts. Stick to the original LG charger or a certified USB-C charger with the correct output (5V/1.8A).
Fix 5: Reattach the Display and Chin Cables
The G5’s modular design means the display and the chin connect via small ribbon cables. If the phone has been dropped, the chin may sit slightly loose, and the battery connection can be intermittent. Remove the chin and reattach it firmly, making sure it clicks into place. If the phone still restarts when you press the chin, the latch may be worn, and a replacement chin (the lower module with the USB-C port) is a cheap fix.
When to Seek Professional Repair
If you have tried the steps above and the phone still restarts, the problem may be a failing motherboard or a damaged power IC. These are not DIY repairs for most people. A reputable phone repair shop can diagnose the issue, but be aware that repair costs may exceed the phone’s current value. At that point, it may be more practical to replace the device.
Preventing Future Restarts
- Use the original charger or a high-quality certified replacement.
- Avoid letting the battery drain to 0% regularly; keep it between 20% and 80% when possible.
- Do not expose the phone to extreme temperatures.
- Handle the chin gently; avoid popping it off unnecessarily.
- If you carry the phone in a pocket or bag, make sure nothing presses hard against the chin.
Frequently Asked Questions
Will a factory reset fix random restarts?
It can, if the cause is a software bug or a corrupted file. However, if the restarts are due to a loose battery connection or a worn battery, a reset will not help. Try the hardware checks first, then reset.
Is the LG G5 battery easily replaceable?
Yes, the battery is removable without any tools. Press the button on the side of the chin, slide the chin off, and the battery slides out. Replacement takes less than a minute.
Can a swollen battery cause restarts?
Yes. A swollen battery can push against the phone’s internals and cause intermittent contact, leading to restarts. It is also a safety hazard, so replace it immediately.
Does the G5 restart more often in cold weather?
Extreme cold can temporarily reduce battery voltage, which might trigger a restart. Keep the phone warm in winter, but avoid overheating it.
Should I update the LG G5 to the latest Android version?
If your G5 is still on an old Android version, updating may fix bugs. However, the G5’s official support ended a while ago, so you may not receive new updates. If an update is available, install it; otherwise, rely on the other fixes.
Is it worth repairing an LG G5 in 2024?
It depends on the cost. If a new battery and a thorough cleaning solve the problem, that is a cheap repair. If the motherboard is failing, repair costs can be high, and it may be better to put the money toward a newer phone.
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