Specifications

iPhone 4 Symptom Charts — Power Issues 34
2012-02-21
Symptom Charts
Power Issues
No Power
Known-Good Parts & Materials Required: USB Power Adapter, Dock Connector to USB Cable,
iOS diagnostics, computer running the latest version of iTunes with a known-good USB port
Quick Check
Symptoms Quick Check
• Will not power on
• Black screen
• Shuts o after removing power
1. Try to restart the device.
2. Try to reset the device.
Deep Dive
Check Result Action
1. Check on/o button.
Check that the on/o button is
not stuck (up or down.)
Is the button functional?
Yes Go to step 2.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.
2. Charge battery.
Plug the device into a known-
good power adapter and cable
to charge the battery for up to
2 minutes.
Is any image displayed on
screen within 2 minutes?
Yes Go to step 4.
No Go to step 3.
3. Reset the device.
Attempt to reset the device
while connected to known-
good power.
After attempted reset, is any
image displayed on screen?
Yes Go to step 4.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.