1. Elmi

    OP Elmi Newbie
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    Hey. I got my Jr today, which worked fine for about half an hour but now I am having major issues.

    When attempting to turn it on after booting a rom, I get stuck in an infinte loop of booting, sometimes it's even going so far as to mess with the contrast and sound. This does not happen when the cart is inserted without an SD card (it loads the Nintendo logo and sits on the EZ Flash Loading screen just fine, no wierdness) or with a normal game cart.

    I have tired reformatting the SD, but the same corruption then loading loop occurs. I have tried a different SD card, but the same issue occurs. The cart is updated to V4.

    Any advice?
     
  2. Calyptor

    Calyptor Member
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    I just got mine a few hours ago. Im using a 4gb fat32 sd that seems to work flawlessly. Make sure its formatted correctly ... this what it says for the OMEGA version.

    card size ≤ 2 GB FAT/FAT16 32KB
    card size ≤ 32 GB FAT32 32KB
    card size ≤ 128 GB exFAT 32KB or Larger

    Im assumin your roms are unzipped in the root of the sd. Does it act up with all roms? If not then the issue might be the rom itself..
     
  3. Elmi

    OP Elmi Newbie
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    It's formatted correctly.

    It is also now happening before I even load a ROM after a fresh format.
     
    Last edited by Elmi, May 6, 2020
  4. zfreeman

    zfreeman GBAtemp Maniac
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    What device are you playing it on? What kind of batteries are you using?
     
  5. Elmi

    OP Elmi Newbie
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    GBP, fresh AAA's

    I'm going to take the back off to clean the contacts and change my batteries, just incase. But I'm not confident that will be the issue.
     
    Last edited by Elmi, May 6, 2020
  6. zfreeman

    zfreeman GBAtemp Maniac
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    Flash carts demand more power compared to original or multicart cartridges.

    https://www.nintendo.co.uk/Support/...atteries-be-used-in-the-Game-Boy--619646.html

    https://bennvenn.myshopify.com/pages/gameboy-pocket-flash-carts-backlights

    A rewired (parallel) Pocket runs great on 10440 batteries because of the higher voltage.

    Series: 2x AAA, 1.5v & 150mAh each = 3v and 150mAh.
    Parallel: 2x 10440, 3.7v & 350mAh each = 3.7v and 700mAh

    https://imgur.com/gallery/FCvmf#s2qMLHd

    https://imgur.com/gallery/8mm6c

    Low voltage operation
    The regulator could manage to keep the CPU alive at an input voltage as low as 1.5V. However, at that voltage there were significant power losses in the conversion, sound wouldn’t work and the Gameboy would crash easily.

    https://blog.gg8.se/wordpress/2009/07/22/testing-gameboy-input-voltage-ranges/
     
    Last edited by zfreeman, May 6, 2020
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  7. Calyptor

    Calyptor Member
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    Just for a side note im running AAs...sounds like zfreeman is right
     
  8. Elmi

    OP Elmi Newbie
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    So I need to rewire the console and buy specialised batteries to run the cart. Greeeeat.
     
  9. zfreeman

    zfreeman GBAtemp Maniac
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    You could sell the Jr. and buy a low-power Everdrive clone, but they have slower RAM when changing games. That's the trade-off: battery life or loading speed.
     
    Last edited by zfreeman, May 6, 2020
  10. Localhorst86

    Localhorst86 GBAtemp Addict
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    AAA is the size. Are you using rechargeable batteries or alkaline? If its alkaline, make sure they are quality brand ones, not some cheaper off-brands.
     
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  11. Elmi

    OP Elmi Newbie
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    Yeah I got some rechargeable NiMH batteries, and now it appears to be pretty stable, at least when the batteries have high charge. Thanks for the tips.
     
  12. Localhorst86

    Localhorst86 GBAtemp Addict
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    Well, for the GBP I would have advised against using rechargables and use quality alkaline instead.
    The Pocket is known to be finicky when it comes to power consumption, so rechargables will quite often not provide enough power, particularly when the cartridge draws more power than a retail cart.
    But if you found rechargables that work fine for you, the better.
     
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