Action Pants

I don't make it a full time job but I have a few friends who I'll help out if they're having computer issues. One of my most recent adventures with this involved a 17" Powerbook G4 that wouldn't turn on randomly. Everything seemed to be fine with it when it ran, but sometimes you would turn it off or put it to sleep and it wouldn't turn back on for you.
My friend bought the computer from CompUSA and got the TAP (Total Assurance Plan) with it. However, since CompUSA is closing all of their stores you have to do everything over the phone. Well I called up their tech support number, told the tech what my problem was and they decided that I needed to send it to a repair facility to have the logic board replaced. They sent me the box, I got the box and sent it out for repair. About a week later I got the laptop back and went to go power it up. When I got some feedback from the screen I noticed that there were gray vertical lines running through it. At first I thought it was just a weird glitch that would go away eventually but that wasn't the case. Everything on the screen was discolored and there was no setting I could change to make that any different.
I have an Apple store near by so I made an appointment with one of their Geniuses to see if they could help me out. They hooked the laptop to an external monitor and the video looked fine. So their conclusion was that there was something wrong with the screen.
I made another service request with CompUSA so I could have this issues taken care of. Sadly because of some glitch on their end, it took them about 3 weeks to get me a box. I'm still a bit angry about that but I digress. During this time I hadn't touched the computer. It just sat there on my work bench waiting to go out. I went to go turn it on one day while waiting for the box and found that the screen looked fine. I was very excited but also unsure because technology doesn't just fix it itself.
After playing around with the computer for a little while, I found that applying pressure to the keyboard or to the bottom of the laptop threw the screen either in a working or not working mood. So I could only conclude that when the logic board was replaced something wasn't fully connected or was allowed to get shorted out.
I wish I took pictures of the screen but I never got around to that. Hope my situation is able to help someone in the future.