Why Alpine cda-7998 I could not get the display-screen to come on

SOURCE: Screen says searching when iPod connected to Alpine CDA-9847

Check your ipod to see if it is shuffle mode. Alpine doesn't document this but they have a bug that causes the problem that you describe. If the ipod is in shuffle mode the Alpine gets confused.

SOURCE: Display light burnt out

Solution #2 is incorrect. Alpine service charges a flat $95 for repairing a CDA-7998. How do I know? I sent mine in two weeks ago and got it back a few days ago. They

1) Replaced the burned-out biolite display
2) Replaced the fantomface cam gear
3) Replaced the main logic board
4) Cleaned the laser/pickup optical assembly

Charge: $95 including return shipping.

SOURCE: the lcd on my CDA 7998 has suddenly gone blank,

change your screen

SOURCE: ALPINE CDA-9853R car audio scheme

contact 91 22 9867607580 you will get any manual