Specifications

iPhone 4 Symptom Charts — Display Issues 40
2012-02-21
Display Issues
No Video / Poor Image
Known-Good Parts & Materials Required: Dock Connector to USB Cable, computer running
the latest version of iTunes with a known-good USB port
Quick Check
Symptoms Quick Check
• No video
• Distorted video
• No backlight
• Rainbow eect
• Poor image
• Bad contrast
• Horizontal / vertical lines
• White screen
• Light bleed
1. Try rotating the device to conrm if the issue is
caused by media, software, or the display.
2. Charge the battery: Plug the device into a known-
good power adapter and cable to charge the
battery for 10 minutes.
3. Restart the device.
4. Reset the device.
Deep Dive
Check Result Action
1. Restore with iTunes.
Restore the device using
the latest version of iTunes.
If restore fails, attempt DFU
restore.
Warning: This will delete all
user data on the device.
Did this resolve the issue?
Yes Issue resolved.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.