Screen won't light up anymore after replacement

Troubleshooting iPad Pro 12.9" screen issues after replacement!

You've done an impressive job replacing the battery and screen. Let's identify potential causes for the non-functional screen:

*Connector Issues:*

1. Improper connection: Verify screen connectors are securely attached.

2. Damaged connectors: Inspect for bent or broken pins.

3. Incorrect orientation: Ensure connectors are aligned correctly.

*Screen Compatibility:*

1. Incompatible screen: Verify the new screen is compatible with iPad Pro 12.9".

2. Incorrect screen configuration: Check if the screen requires additional calibration.

*Power and Signal Issues:*

1. Faulty backlight: Check if the backlight cable is damaged or disconnected.

2. Power supply: Ensure the power supply lines are intact.

3. Signal interference: Verify no interference from nearby components.

*Home Button and Touch ID:*

1. Improper home button installation: Check alignment and secure attachment.

2. Touch ID issues: Ensure the home button's fingerprint sensor is properly connected.

*Additional Checks:*

1. Inspect the LCD and digitizer cables for damage.

2. Verify the screen's flex cables are not creased or damaged.

3. Check for any debris or dust obstructing connectors.

*ifixit Resources:*

1. ifixit's iPad Pro 12.9" repair guide.

2. ifixit's screen replacement tutorial.

*Next Steps:*

1. Re-check connections and cables.

2. Consult ifixit's support forums or YouTube tutorials.

3. Consider seeking professional assistance.

*Questions to Clarify:*

1. Did you use original Apple parts or third-party components?

2. Were there any signs of physical damage during disassembly?

3. Have you tried resetting the iPad (pressing Power + Volume Down)?

To further assist, please provide:

1. iPad Pro 12.9" model number.

2. Any error messages or beeps.

3. Photos of the screen connectors and cables.

Type 'connectors' to explore connection-related issues or 'screen' to discuss screen compatibility and configuration.