iPhone 5c dead. Black screen.
“iphon 5c still dead! Replaced the screen assembly and battery. What next, should have bought a new phone!!”
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Did the previous (original) battery just gradually weaken before eventually dying or did the phone stop working suddenly? A sudden death points to a logic board (charge circuit) issue. A gradual decline points more to a defective replacement battery.
The most obvious thing to double check is the battery. There are many poor quality replacement batteries on the market and depending on where you bought it, it may be defective.
Take the battery out and measure it with a multimeter/voltmeter. It should read somewhere between 3.8V and 4.2V. Anything less than that and it is, at least, discharged and at worst defective. If you have access to another iPhone 5C, try to install it on that phone to see if it works or charges.
If the battery seems sufficiently charged, then your problem probably lies on the logic board. Cheap, copy Lightning cables and chargers can damage the charging circuit. Try connecting your phone to an iTunes enabled computer to see if iTunes recognizes your phone.
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If you've installed a known working replacement battery; have plugged the device into the charger as well as itunes on your computer and still get no signs of life, then you are very likely looking at a motherboard related issue.
The boot logo should at lease show up once plugged in, whether you have a bad battery or not. And if the screen was the issue, it should still be recognized when you plug it into iTunes. Chances of both LCD and Battery being completely Toast is VERY low.
If there isn't important data you're trying to retrieve I would suggest using your money towards the purchase a new device as opposed to sinking money into the repair. They are reasonably priced on eBay or Amazon, or maybe you can go through your carriers insurance to get a replacement!
If you're set on repairing the device I would get a hold of Jessa at iPad Rehab. They've got a good deal of knowledge on motherboard repair and diagnosis.
Hope this helps!
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4 Comments
Hi,
Some other information would be helpful to try help your situation.
When did the iPhone last work? Any recent physical damage? Liquid damage?
by PhoneOpsPlus
How did the phone die? Like ged said.
by Ben
The phone went dead. tried to charge it. nothing. put in a new battery. nothing . no sign of life.
by autolitre
The logic board was dead as disco. bought a iPhone 6 at a good price. I may replace the logic board as a spare. Thanks
by autolitre