I’d recommend following the teardown guide for the iPhone 6 Plus (found here) and following it in reverse. As long as your motherboard, screen & battery are functioning your phone should boot up without an issue. You may need a charging port and home button installed as well to use the phone or to transfer data from it.
Having a similar issue with a tablet I've been given to repair. Customer having troubles with it turning on and charging, even tried disconnecting and reconnecting the battery and he said that worked temporarily. I've plugged in a battery tester on it, and the current going into the tablet through the charging port is inconsistent, meaning that the charging port is most likely damaged. In order to fix this issue, the charging port can be replaced so that the battery can be charged properly again.
Has it been taken apart before? Maybe the dock connector on the inside connecting to the motherboard isn't taking the power to the battery, just a thought; could be wrong. But if it's new then it's probably best you take it back instead of opening it up.
In my noob experience I would suggest just pay for a new screen, the ones I get are around $55 NZD, but maybe someone else here may have a better suggestion.
Not on ebay but an NZ version of it as such (trademe.co.nz) I buy iPhones and fix them up then sell them off again. How much? Depends on what model (ie 4 or 4S) and how many GB's and also what's wrong with it. No repair business, considering it once I gain some more experience. I buy the screens from the same site, usually costing around $55 NZD each.
If you're talking about the touch keys at the bottom, slide a thin tool between the glass and the touch keys on the underside of the glass carefully as it's held by adhesive
While this suggestion is more professional, it requires more time and resources that aren't completely necessary, or maybe not for your average repairer. Of all the S4 screens I've replaced I use the basic adhesive that comes with the glass from my supplier and that has enough strength to hold the glass in place when it is applied correctly. This was interesting though, thanks!
That's unfortunate, sometimes in some unlucky cases the LCD or digitiser tries to come up with the glass which probably means it needs to be heated up for longer with the heatgun.
It should already be attached to the LCD, if not then you can purchase the adhesive and attach it to the LCD yourself
Step 4 "We highlighted buttons with pink circles for easy recognition." except that there's no pink circles. ummm?
If you're talking about the touch keys at the bottom, slide a thin tool between the glass and the touch keys on the underside of the glass carefully as it's held by adhesive
Great suggestion!
Your friend is lying to you and doesn't know anything he is saying either, you probably should believe everything people say.
While this suggestion is more professional, it requires more time and resources that aren't completely necessary, or maybe not for your average repairer. Of all the S4 screens I've replaced I use the basic adhesive that comes with the glass from my supplier and that has enough strength to hold the glass in place when it is applied correctly. This was interesting though, thanks!
That's unfortunate, sometimes in some unlucky cases the LCD or digitiser tries to come up with the glass which probably means it needs to be heated up for longer with the heatgun.
You'll need to leave holes otherwise you may cover the sensors or other components to the phone.