Chosen Solution
i replaced my iphone battery yesterday it came on with 75 percent so i ran it until it died last night. i placed it on the charger and saw the charging indicator and went to bed. i woke up this morning and its not showing anything, no charging indicator or anything just a black screen. i tried holding the power and home button for more than 30 seconds and got nothing. any ideas?
There are two possibilities here: You have a bad quality replacement batteryYou’re charging circuit on the logic board is defective Normally, the first step in troubleshooting is to replace the battery with a known-good (or high quality from a reputable vendor) battery. You can also open up the phone and disconnect the battery. Measure the voltage of the battery with a multimeter. The phone requires that the battery be at least ~3.5V in order for it to boot. If you’re battery reads higher than this, then you definitely have a logic board issue. Also try @benjamen50 suggestion.
