It could be something as simple as a poorly seated connector. I would recommend detaching your display and then re-seating the connection. If this does not solve the problem, it is possible that your LCD was 'zapped' during installation by the logic board, in which case you would need to replace the [http://www.ifixit.com/iPod-Parts/iPod-Touch-Gen-1-Color-Display/IF132-000|iPod Touch 1st Generation Display].
It could be something as simple as a poorly seated connector. I would recommend detaching your display and then re-seating the connection. If this does not solve the problem, it is possible that your LCD was 'zapped' during installation by the logic board, in which case you would need to replace the [http://www.ifixit.com/iPod-Parts/iPod-Touch-Gen-1-Color-Display/IF132-000|iPod Touch 1st Generation Display].
It could be something as simple as a poorly seated connector. I would recommend detaching your display and then re-seating the connection. If this does not solves the problem, it is possible that your LCD was 'zapped' during installation by the logic board, in which case you would need to replace the [http://www.ifixit.com/iPod-Parts/iPod-Touch-Gen-1-Color-Display/IF132-000|iPod Touch 1st Generation Display].
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It could be something as simple as a poorly seated connector. I would recommend detaching your display and then re-seating the connection. If this does not solve the problem, it is possible that your LCD was 'zapped' during installation by the logic board, in which case you would need to replace the [http://www.ifixit.com/iPod-Parts/iPod-Touch-Gen-1-Color-Display/IF132-000|iPod Touch 1st Generation Display].
It could be something as simple as a poorly seated connector. I would recommend detaching your display and then re-seating the connection. If this does not solves the problem, it is possible that your LCD was 'zapped' during installation by the logic board, in which case you would need to replace the [http://www.ifixit.com/iPod-Parts/iPod-Touch-Gen-1-Color-Display/IF132-000|iPod Touch 1st Generation Display].