Bad screen and wiped HD on G4/867 TiBook

I got a TiBook 867 from someone and the LCD screen is black. She hooked it up via the FireWire to another Mac and wiped the HD through Target Disk Mode. I would like to reinstall OS X 10.4 on it (I have that version on DVD) but cannot get it to display through the external monitor I set up.
It chimes and goes through the proper power up procedure, but no pic on the screen or external monitor. Any ideas?

Ideas about the display, you mean? Shine a bright light on it while the machine is operating. Is the display image there, just not backlit? If so, and it doesn't brighten up when you adjust the brightness (press the F2 key), the display inverter board is bad and needs to be replaced.
If there's really no display image at all, a) the video cable may be disconnected from the logic board or partly or completely severed; b) the LCD may be bad; c) the GPU on the logic board may be bad; or d) there may be some other major logic board failure. To eliminate one or more of these possibilities, connect an external monitor. If only the desktop background appears on it, press the F7 key to put the monitor in Display Mirroring mode. If that produces a normal or nearly-normal display image with Dock and menu bar, your GPU and logic board are OK and the problem lies in the video cable or its conections (more likely) or the LCD panel (less likely). If the external monitor remains black or blankly blue, gray, etc., your GPU or some other logic board component is gone, and the Tibook is dead for all practical purposes. It will cost more to repair than it will be worth after it's repaired.

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