If your iPhone is not turning on there are a few things that could be going on. Luckily, there are some steps that you can take before bringing it in for repair. If none of the below steps work feel free to give us a shout using the contact information at the bottom of this page.
The first thing that we need to determine is if your iPhone has been liquid damaged. Liquid Damage doesn't necessarily mean that the phone was dropped in a lake or had something spilled on it (although both of those definitely do count). We run into lots of people who like to play music when they are in the shower and even that ambient moisture can damage components like the earpiece speaker that are delicate and exposed.
Liquid Damage typically only gets worse the longer you wait to have the device disassembled and professionally cleaned. No, rice is not a way to resolve liquid damage. The liquid may dry up but anything that was suspended in that liquid will be left behind to cause corrosion and other mischief (maybe not at that moment but at some point). We fully disassemble liquid damaged devices and put them through an ultrasonic cleaner with an electronics cleaning solution to remove any of that corrosion and all liquid. We then displace the cleaning solution with 99% Isopropyl Alcohol which entirely evaporates without leaving a residue.
Second thing to be suspicious of when your device is not power on would be the internal battery. If you have an older Android Smartphone or a newer budget smartphone from ZTE/BLU or similar your battery may be removable by popping off the rear battery cover (there's typically a small pry point on the edge of the device that you can lift away). Removing your battery and re-inserting it will force your device to fully power off and may resolve some instances of the No Power symptom.