I'm sorry, but my second one's display is broken too, this is why I got two of them...

On Ebay, a replacement screen had the same price (around 90EUR) as a used 718, so I bought another 718 saving me from disassembling the broken one...

If you go for a replacement screen - mind that the following devices share the same display unit:

T-Mobile: MDA Pro / MDA 4 / MDA IV
O2: XDA exec
Vodafone: VPA 4 / VPA IV
Qtek: 9000
Fujitsu Siemens: Loox 700 / Loox 710 / Loox 718 / Loox 720

But be carefull to buy the whole display unit consisting of 2 parts: display and touchscreen.

PS: There is an app that lets you remote control the 718, helped me doing backups after the display got broken: http://www.mymobiler.com/