I'm pretty sure that it won't be practical to repair the display - other posts indicate that the chip containing the display electronics would have to be replaced, which would require some quite sophisticated soldering equipment.

I'm thinking along the lines of using the vanilla OS2007 JFFS2 root image and modifying it on the PC side to include an ssh server, and to pre-configure the WLAN connection so that the N770 boots up to an accessible state.

Henning