#AGB-001 won't boot only GBC games that have a battery after Funnyplaying IPS 3.0 installation?

1 messages · Page 1 of 1 (latest)

timid zephyr
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I recently installed a Funnyplaying IPS screen in an AGB-001. I don't have any GBA cartridges at the moment, just four GBC (Super Mario Land, Pokemon Red, Wario Land, and Donkey Kong).

All four worked fine before I installed the screen. After I installed the screen, only Super Mario Land works. The screen stays blank for the other three and the speaker repeatedly makes a clicking noise.

I realised Super Mario Land is the only one that does not have a battery. What could be making my GBA not work with GBC cartridges with a battery?

If I unplug the screen, I can hear all of the games boot fine (but obviously, the screen remains blank).

I've tried:

  • reseating both ribbon cables several times
  • using high quality Energizer Ultimate Lithium batteries,
  • removing all solder that I did for the L/R/Select buttons
  • cleaning inside the power switch with IPA
  • cleaning the cartridge slot with IPA

I'm really stumped. Any ideas of what I can try? I don't have a multimeter, not sure if that's going to make it impossible to properly troubleshoot?

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timid zephyr
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So because this is driving me mad I just tried popping the battery off Pokemon Red and seeing if that worked... still didn't work. Perhaps its not the battery, but because these carts are bigger/look more complicated than Super Mario Land (and therefore possibly draw more power?) I don't know...

lone scroll
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Is it possible the ribbon isn't seated properly? I think the connection on the mainboard is in all the way - but make sure you put the locks down (the left side is open), but the ribbon on the display flex board looks… slightly crooked - could you gently remove it, then reinsert and test?

(Otherwise the board looks really clean and nothing jumps out as the problem)

One other question: when you say you get a blank screen, do you get a blank screen on boot, or after you see the Game Boy Advance logo and the introduction/welcome jingle?

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timid zephyr
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I've re-seated that ribbon several times and it hasn't made a difference, I probably just did an average job the last time! I'll make sure it's in fully but I don't think it will do anything,

It's a blank screen on boot. The power LED goes green, but the screen stays black and the speaker repeatedly makes a clicking noise.

If I don't have a cartridge in, I get the Game Boy Advance logo and jingle.

If I have Super Mario Land in, it boots as normal.

I'm going to see if I can get my hands on a GBA cart and see if that works, but I doubt it... It seems like it's not getting enough juice to power anything other than a very old and simple GB cart (Super Mario Land is 1989, no battery, half the size of the other carts inside...)

weak sluice
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Trying to eliminate variables here. What happens when you test the carts with the original GBA screen?

timid zephyr
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They all work fine.

timid zephyr
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To be clear, I just swapped it back to the original screen and tested and they're all working fine (as they were before I attempted the mod at all).

I also tried using the original back shell in case it was something wrong with the new shell's battery terminal, but had the same problem.

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I guess it could only be a power issue with the board (i.e. not delivering enough power to the new screen in certain circumstances) or a faulty screen... I might get a second GBA to try the screen in and see if the same thing happens.

weak sluice
timid zephyr
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Yep, took off the cover and cleaned inside. Using new Energizer lithium batteries.

weak sluice
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Which FP ribbon are you using?

timid zephyr
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Strangely there was a tiny bug stuck in the power button, thought I'd found the culprit when I saw that... but no difference 🤣