Why does my phone not turn on with a battery at 8.7 V (so, full) and no USB device connected?
Why does my phone not turn on with a battery at 8.7 V (so, full) and no USB device connected?
I’m encountering a perplexing issue with my smartphone that has left me quite frustrated. Despite the battery reading at 8.7 volts, indicating that it’s fully charged, my phone will not turn on. I have made sure that no USB devices are connected to it. The screen remains completely black, and there is no sign of life whatsoever when I press the power button. I haven’t dropped the phone or exposed it to any extreme conditions that might have caused this problem. This is particularly baffling because until recently, it was functioning perfectly fine with no indication of any impending issues. Now, I’m stuck with a device that seems fully charged but just won’t power up. I’m not sure what could be causing this, and it’s really disrupting my ability to use my phone.
6 Answers
Battery Calibration:
Your battery reading might be inaccurate due to calibration issues. Try recalibrating your battery:
1. Drain the battery until the phone turns off.
2. Charge it fully to 100%.
3. Repeat the process a few times to reset the battery calibration.
If the phone still doesn’t power on, it could be an indication of a deeper issue.
Look into the possibility of a display issue. If the phone turns on but the screen remains black, it might be a problem with the display itself. Try calling your phone from another device to see if it rings or vibrates. You could also use a flashlight to check if there are any faint images on the screen, indicating that the display backlight might have failed.
Possible Software Issues:
1. Your phone’s software might be corrupted, preventing it from booting up even with a full battery.
2. Perform a hard reset by holding down the power and volume down buttons simultaneously for about 10 seconds. This might force the phone to restart.
3. If this doesn’t work, you could try booting into recovery mode (the exact method varies by phone model), where you can perform a system reset.
Check the Battery Connection:
1. Even though your battery shows it’s fully charged, the connection might be loose or corroded. Open the phone (if possible) and ensure the battery is seated properly.
2. Examine the battery connectors for any dirt or debris that might interfere with the connection.
3. If available, try using another battery to see if the problem persists. Sometimes a full reading might be incorrect due to a faulty battery.
Third-Party App Conflict:
1. Sometimes, a recently installed app can cause the phone not to turn on. Start in Safe Mode to disable third-party apps.
2. To enter Safe Mode:
a. Hold the power button until the power off menu appears.
b. Tap and hold ‘Power off’ until the Safe Mode option appears. Tap ‘OK.’
3. If the phone turns on in Safe Mode, uninstall any recently installed apps and see if that resolves the issue.
Consider hardware problems. There might be an issue with the internal components. A faulty power button or a damaged motherboard could be responsible. A detailed hardware inspection might be required to pinpoint the exact issue. Additionally, looking for any signs of water damage could reveal the cause.