HowTo flash via adb or fastboot?

Hello,

I updatet my SlimKat Rom from an weekly to "Slim-honami-4.4.4.build.9.0-OFFICIAL-8317".
After that the screen stays black. But the phone works, I get message notification, the Touchscreen vibrates, the alarm works...

Now I won't loose my data and settings. Can I flash the image or the previous again ( it stay on the sd card) via adb or fastboot without touching the phone?

I can enter TWRP, the lights told me (from red to purple and yellow) and it still works. My phone vibrates when I touch (the huge buttons) but I can't see anything.

I've to wipe Dalvik and cache. NOT A FULL WIPE. And install the "Slim-Honami***.zip".
Or maybe can I repair the graphic driver or device?

Thanks you all