1. godreborn

    OP godreborn GBAtemp Guru
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    I just got a gba sp in the mail, but I'm not sure if something is wrong with it. here's an image:

    [​IMG]

    see those somewhat dark lines going across the screen? is that normal? this is a gameboy color game btw. it doesn't have those lines when it shows the gba logo after turning the system on.
     
  2. CMDreamer

    CMDreamer GBAtemp Advanced Fan
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    Have you checked it with another game cartridge (GBA, GB, GBC)?

    Does it behave the same?
     
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  3. godreborn

    OP godreborn GBAtemp Guru
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    yes, gbc has those dark lines even on the gameboy logo. it's not as pronounced with gba, since it fills the screen, but they are present. the gba logo doesn't have them though.
     
  4. FAST6191

    FAST6191 Techromancer
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    I assume it goes away when the light is turned off.

    Banding/uneven backlight like that is a failure mode of, or perhaps more accurately flaw of, screens/their backlights. Could be age, could be usage, could just be flawed from the factory.

    The GBA logo is white (compared to that which is all very dark) so I imagine it will be less prevalent there. That said GBC uses higher voltage so it could be related to that.
     
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  5. godreborn

    OP godreborn GBAtemp Guru
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    it's a refurbished system, so maybe something is failing? I sent a message to the seller, but he doesn't accept returns.
     
  6. FAST6191

    FAST6191 Techromancer
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    I have a laptop that has been "failing" like that for years at this point, and tend not to assume any other screen displaying that has the backlight on the way out either. It can be a failure of screen bonding or a sign of impending backlight/backlight inverter/backlight ribbon being on the way out but pressure will alleviate the bonding issue and you might get lucky with a screen angle to see if it is the other.

    It could go tomorrow, more likely it will just be something that impacts your enjoyment. I don't think we have proper backlight replacements so whole screen replacement it is, and at that point you might as well look at what it takes to do a AGS-101 conversion (or better).
     
  7. godreborn

    OP godreborn GBAtemp Guru
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    I think I've found the answer. those lines are being caused by polarization. however, if I dim the screen by turning off the back light, games are so dark that it's virtually unplayable. I did beat games with my original gba, so I don't understand how if the screen is that dark.
     
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