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About McWill

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  1. No problem There's a short circuit at one of the pads of D0-D3 or they are mixed up. Please check again and it will work without issues Cheers, Marco
  2. For LYNX-I also look here: https://circuit-board.de/forum/index.php/Thread/4779-srdwa-Donking2000-Atari-Lynx-1-2-Spannungsregler-Umbau-SMD-Variante/ It's in german, but Google Translate will help you
  3. Look here: http://atariage.com/forums/topic/238692-how-to-installing-5v-regulator-mod-in-an-atari-lynx-ii/
  4. Thank you I would do the 5-Volt mod, but it's up to you. I had a working LYNX-II for testing my LCD mod kits and it was working fine. But after thousands of times switching it on and off, the zener diode got broken and my LYNX and the tested mod kit were "fried" (because the complete voltage of the power supply went through the LYNX - about 9-15V!)
  5. I would recommend to install the 5-Volt mod (RECOM DC/DC) to prevent any damages caused by a faulty zener diode. The original power circuit is a ticking time bomb. Also if the zener diode is new.
  6. No, but if you can switch between normal mode and scanline mode, you have the latest firmware.
  7. This could be very excited BTW my production for the GBC mod kit is already running. I presented the prototype in November 2018 on the Ejagfest in Germany. The final version has 32K colors and would be almost plug and play. Just 1 wire has to be soldered. You also can install a VGA connector, if you want. The case can be closed with the existing screws.
  8. With the thumbwheel you can switch between VGA and internal 3.5" LCD on the GG. You don't need to wire VCC and GND to the thumbwheel, if you don't use VGA out.
  9. For the latest firmware you have to send it to my address and I will do the firmware update. Then please send PM
  10. I have seen you used the wrong pin at the 74HC74 (the blue backlight wire). Please change and I guess it will working correctly.
  11. It was the case since the 1st batch, because the LCD is a little bit smaller than the original one. So you can see some of the silver LCD housing, sometimes only on the left or on both sides a little bit. I would also suggest to use a black marker. I guess the old backlight ON/OFF circuit is faulty. Try to exchange the 74HC74. The LCD mod only gets the info ON/OFF from this circuit, so the LCD mod can't be faulty.
  12. Yes, VCC is 5V (the lower side of R23). Then it will work
  13. You forgot the wire from T10 to VCC. Because it's a SMS game, the pixels will be displayed in another way then.
  14. The Majesco GGs are a bit complicated and complete different to the GG VA0 and VA1. But I will find a solution and let you know then, if the new firmware is available.
  15. Yes, the LYNX-I mod kits (also the GG and LYNX-II mod kits) are available I'm also on the Ejagfest on 3rd and 4th November.
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