Screen Apple Ibook
 APPLE IBOOK G4 12.1" MATTE LCD SCREEN LP121X1 - PERFECT CONDITION!!! US $24.90 
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iBook G4 Overheating & Screen Problems?
Okay, I've been having 2 issues with my Apple iBook G4 lately...
Bought the laptop refurbished 2 1/2 years ago, and so I don't have Apple Care anymore, and there isn't a store open near where I live (yet 
)
Scenario 1: The left side underside of my laptop keeps getting REALLY hot, which is wierd since it's not the side where the battery is. I don't mind getting a cooling pad/ fans, but am wondering if anyone knows why it would be getting so hot (are worse things to come?). Happens when I am using my laptop for at least 20 minutes, whether it's charging or not.
Scenario 2: My screen keeps getting really dark, to the point where its ALMOST blacked out whenever I move it a certain way, which is a bummer, because it means I always have to have the screen tilted the same way all the time. Does anyone know how much it costs go get fixed? Or is it not worth it?
Any insight is greatly appreciated. Thanks!!
If the system is a refurb, then it was used by someone else before, and despite Apple's best efforts, it's still impossible to always know what that previous user "really" did to the system. I used to work repairing refurbished computers for Dell at one of it's facilities in Austin, I know that not all previous owners of systems are honest when sending a computer back to it's manufacturer.
To answer your first question:
The system batteries on most laptops tend not to get real hot. What you are feeling getting hot is the graphics card and the PowerPC CPU/processor chip. The ATI graphics cards and the PowerPC processors (Intel and AMD processors for that fact as well) tend to get hot. They have between 50 million to 150 million circuits and transistors running electricity through them millions of times per second, this builds up electrical resistance fast and generates heat. Since laptops have less air-breathing space in them than most desktop computers do, their processors and graphics cards can heat up even faster.
To answer your second question:
It is possible that the previous user of the system caused "latent damage" to either the LCD monitor of the system or it's connecting data cables to the laptops graphics card and motherboard. This could have happened if the system was dropped or if the LCD lid or "backplane" was hit with significant enough force.
At this point, the best thing to do is back up at least your data files (ex. Word documents, iTunes music, photos, etc.) to either a burned DVD/CD or at least a USB flash drive/memory stick and start looking at a new laptop. Unless you are a computer gamer or media creator, I would look at the 13-inch MacBook with 2GB RAM from Apple for about $1000 as a good replacement laptop. And if you are a computer novice, I would recommend getting a "New" system as opposed to a "Refurbished" system.
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