Chosen Solution
So my friend has dropped their iPhone 8 and it is not turning on at all. Back seems severely cracked and front screen has only a few cracks. I’ve tried plugging it into the charger with a battery activation board and at first it showed a red light, but plugging it back in the second time, it began to accept some charge for a short time, then no current or voltage. The power and volume buttons of course wouldn’t do anything to contribute turning it on. The battery however does still work and can be charged externally. Summary, no power whatsoever. What could be the problem? And which area should I check, especially where on the logic board?
The first thing you need to do is rule out parts. · Battery. · Charge port assembly. · Screen. · Front flex assembly. If it is not a parts problem you will need to move onto the logic board. You will need to find out if it is drawing any amps before prompt to boot and then after prompt to boot. You will need a DCPS and squid or iPower leads for this. Let us know the results so we can tell you what lines to start checking.
