My oh my. Sorry it's turned out to be a fishy trouble maker! Makes it more interesting for us though
Indeed im just swapping the mod board onto my GG now to fully test that... basically im testing everything I can test before my scope gets here... once that gets here you can almost guarantee I probe a few data lines and find my problem within a few mins...
Im thinking it could be 32mhz clock signal issue but as yet im unsure... I'm having some fun poking it though. It's not acting like my mod at all... i get the fuz then a blue screen but no game boot... on my one i get fuz, then blue and then boot.
Edit: Your mod works in my GG - The mod kit is fine...
So 100% mainboard. One positive a fella I know has offered up parts when I work out what it is that is broken. So I can get hold of the replacement IC's which was a worry. So tonight I will transplant every IC onto my GG and see what makes my GG stop working
there are only 6 IC's so it shouldnt be too bad.
Edit 2: I started swapping IC's straight away SDram off of the broken one does not work on my board... just going to put my SDRam on that board.
OK had a wobble and for a min both of our GG's were dead...
but put all my chips back on mine and its back to life. Phew
So an outline of the 6 main IC's as I am testing:
Known good components:
- VRAM - works on my board
Known bad components:
-SDRAM - It's shot 100% swapped onto my board it does not work.