My lg 840g wont turn on but the charging screen will come up if i plug it up

If it is old it's the battery's inability to keep a charge. If it's new then the settings are on "power saver".

Try going into the stock recovery and then plugging in the charger. To get into the stock recovery: Pull battery. Hold power button for 30 sec to clear the phone. Hold home + volume down button, then power button (All at the same time) until you see your android recovery screen. Then plug phone into charger for 30min. Unplug charger, then select reboot system. Once rebooted finish charging.
If this doesn't work then you could have a defective battery, cable, or wall plug end.

try a new battery in the phone if that does not work you will after try a different charger or get the charger port fixing

How can I fix a lg840g tracfone that has red block beside battery terminal a rep is telling me means it is no longer operable?

Hello My Dear Friend:::



1.Check the device's battery level for at least two bars of strength.
2.If the battery level is low, charge the battery.
3.If the issue is not resolved, remove the back cover.
4.Remove the battery.
5.Wait 10 seconds.
6.Press and hold the W key.
7.While pressing down the W key, re-insert the battery.
•The device restarts and after approximately 15 seconds, the 'Recovery' screen appears
•Release the power button but *continue holding the home button*, for another 30 seconds.
Step
Thanks

Although it is not recommended for normal operation, try turning it on with the charger plugged in. If this works, check the battery status indicator. If it shows a full charge, try disconnecting the charger. If the Nextbook quits working, the battery is bad.
If it does not turn on, try holding the power button for five seconds, then while holding the power button on, plug in the charger and continue holding for five seconds. If nothing happens, release and press the power button again with the charger still plugged in. (This may reset the internal power management chip.) Also, try the recessed reset switch (see your owner's manual).
If none of this works, verify that the charger unit is good. The simplest and safest method is to measure the output voltage on the output plug with a digital multi-meter while the charger is plugged into an AC outlet. It should be within 5% of the nominal output voltage on the charger label.
The most common power problems are battery failure, broken charger wire (usually next to the plug or the power conversion box), or broken charger jack in the unit.

try taking the battery out and while holding the power button in put the battery back in, if you still get nothing on the screen try doing the same , holding the power button down while you insert the charger.

If a tri coloured screen appears you will be able to reflash it, if it doesnt appear, then your battery is dead and it wont charge no matter how much you try, the MDA(or wizard) wont charge the battery, unless windows is running, i would recommend you buy a new battery, they are cheap enough

NOTE!!!
If the battery is very low but you can get the multicoloured bootscreen, i would not advise flashing it as you have no idea of how much charge is in the battery, if the battery fails during flashing you wont have a phone anymore

I have a feeling that when you ran the battery down it is now struggling to get and hold a charge.
If you have a friend with a similar battery perhaps try that, or go to a mobile store and ask them to try a new battery for you.

Hello ! I was in panic attack !!! did everthing and nothing seems to wake up my iphone. I forgot to charge it so battery went full empty, then I plug it on the wall charger, and nothing happend. I let it all nite, and next morning,... surprise !!!!! still the red icon, No battery, the iphone didnt restart!!!! How I fix it?
1-unplug it from the wall charger 2- press middle button and startup button, same time 3-when red battery dissapear, plug the charger. 4_ do this many times. Didnt work for me the first time, but at the end it works !!!!
NOW MY IPHONE IS WORKING GREAT !!!!! GOD BLESS YOU ALL !!!!!!!!

I'm having the exact problem. I've took the battery, SD card, and SIMS card out and put it back in many times but nothing works. It freezes at the PRADA logo! Help!