Phone was in the washer

Must get to nearest repair store that can do a motherboard cleaning. This is done with alcohol and a specific machine. They will then dry your motherboard out in a dehydrator.

LG X Power K220 is built in battery.

• don't power on the phone
• don't charge the phone
• strongly suggest send to repair

here the another way ( not recommanded)

Use a Desiccant

Use a desiccant to wick away any leftover moisture. The most convenient choice is uncooked rice. Just leave the phone (and its disconnected battery) submerged in a bowl of grains overnight. If you're worried about rice dust getting inside your phone, you can instead use the packets of silica gel that often come stuffed in the pockets of new clothes. But acting fast is far more important than avoiding a little dust, so don't waste time shopping if you don't already have a drawer full of silica gel.

The most important thing to remember is to avoid heat. That means no hair dryers, ovens, microwaves or extended periods in direct sunlight. While heat will certainly evaporate the moisture, it could also warp components and melt adhesives. Those fragile glues are also why you'll want to avoid dunking the phone in rubbing alcohol (an oft­prescribed tip on the Web). Alcohol is a solvent and can dissolve the internal adhesives. (If you drop your phone in the toilet, it's okay to wipe the outside with alcohol to disinfect it.)

One final, perhaps surprising, note: If your phone gets soaked in salt water, you should probably flush the whole thing in fresh water before it dries. When salt water evaporates, it leaves crystals that can damage a phone's fragile components. Just be sure to remove the battery before flooding the device.

kusam no dessicant in the world is going to work unless you totally disassemble your phone.Disassemble your phone using this video and clean everything after you remove all the EMI shields from your circuit board. If you do not remove those you are not cleaning most of the board.

Clean everything with +90% (no less than 90%) isopropyl alcohol. Follow this guide, and even so it was written for an Apple iPhone 3G all the points are still pertinent to your phone. Pay particular attention to the SMD components, check for charred missing or broken missing. You can then dry the board in an oven or equivalent at 220deg F (not higher;-) for a few hours. Best way to clean it would of course be through an ultrasonic cleaner. Consider professional help with that When it is properly cleaned, replace the battery. All these steps are to avoid delayed failure caused by corrosion. Once all this is done, reassemble your phone and reevaluate.

As always, if not sure what you are looking at or if you are unsure if your board shows corrosion or missing, damaged part, post some pictures with our question. For that use this guide 기존 질문에 이미지 추가하기