Powerbook 12" display question

Hi all
I recently bought a 1.5 Powerbook computer from someone. I was told before I bought it; that the screen was dim and you can faintly see things in the Finder. The person that I bought it from told me that she took it to the apple store and they said that it was the inverter board that was the problem.
After I bought the computer, I took it home and started to troubleshoot the problem. Well, the display is definitely faint. However, about a third of the display (from about the middle to the lower part of the display) is completely black.
I haven't hooked up the powerbook to an external monitor. If I assume that the person who I bought it from told me the truth about the Apple Store looking at the computer, that they would have done that to eliminate that possibility.
My question is this. Since the lower portion of the screen is completely dark (and the upper half is faint), would the problem be the inverter board or the actual display?
Also, I have another 12" powerbook (it is the 867 model) that is disassembled at the moment. Would it be possible to take the connector from that display and somehow put it in the 1.5 model's logic board in order to see if the display would come on?
Another question: if it is the inverter board and not the screen, would I have to take the whole display out in order to get the inverter board? I noticed in the powerbook-medic's video take apart guide; that he only goes as far as to removing the display in his video and doesn't show the removal of the inverter. I know that after you take out the LCD, you have to disengage the airport part from the inverter from his take apart manual. Any thoughts on this for advance precautions?
Thanks in advance for your time in reading this.

Well, so much for the previous questions
Anyway, I decided to buy a used display on Ebay. The person I got it from has 100% feedback and has done many auctions.
In any event, after taking the powerbook apart once again, I put in the new (used) display in. I also put in my hard drive from another aluminum powerbook machine (12" 867). When I booted the machine, I didn't see anything on the screen. All I heard was a low long beep for a couple of seconds.
I decided to put in another RAM chip and the original hard drive from the 1.5 machine. I started up the machine and noticed that it was doing the SAME thing that it was doing with the other screen. It was giving me a faint desktop.
I took the machine to work and tried it again with an external monitor once again. It works with an external display.
So, before I email this woman and tell her that she gave me a display with a bad inverter board. Would it be possible that there is something else wrong other than the display.
BTW, I did the P RAM thing and reset the power manager.

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i wonder if i could connect the pb 15" display with a new G5 dual and turn the pb off, only the display on?
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