The LG Optimus L90 is a smart phone from the third generation of the "Optimus L" series of phones manufactured by LG Electronics.

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Device won’t power on

My phone will not power on, after pressing the power button.

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Charger/cord malfunction

You need to know which piece of your charger set is malfunctioning. The two pieces are the USB adapter and USB cable. It is very common that you do not need to replace the whole set. Instead usually the USB cable wears out more quickly. This occurs because the USB cable becomes stretched, bundled, and pulled. The adapter is in the shape of a cube with not much wiggle room to tamper with. For most USB cables there is not much that can be done to repair a wire that has been damaged, and your best option is to find a replacement for it. The same can be said for the USB adapter if it is damaged.

Incompatible charger

The type of charger needed for this phone is a Micro USB cable with a USB attachment to plug into a USB adapter. This then can be plugged into a wall outlet having two or three pin spaces designed to allow insertion of an adapter.

Needs replacement battery

If your USB cable and adapter are working fine, then you may need to replace your battery. This phone uses a Li-ion battery. To remove the non-functioning battery you must remove your phone case by tugging at one of the corners where the phone and case meet. Then in the center of the device you will see a large square silver piece of metal. This is your battery; there is a space for you to grab on to it and gently pull it out. Now just slip in your new battery and place the case back on. Your device should now be able to power on.

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