I have a Turbo Twin (AN-505-BK) that I bought busted and dirty, but in decent cosmetic shape. New 3rd party PSU. The Japanese seller said "when power go in, smoke come out." I figured it had a bad main cap, correctly, which I replaced. The cartridge side now works fine, although the A and B buttons don't work, but they're probably just dirty contacts. The Disk System, on the other hand, won't light up at all. All I get is a grey screen instead of the "Set Disk Card" or whatever. No disk activity at all. Seems to be attached correctly and all. Any thoughts?
It may be busted or have a bad power board. You can replace FDS drives in a Twin with a regular FDS system. If it is a power issue though, that will not work. I do not remember if there is a fuse on the FDS side, have you checked for that?
So a Nintendo FDS drive is a drop-in replacement for a Sharp one?
Quote from: daskrabs on February 12, 2015, 07:40:43 am
So a Nintendo FDS drive is a drop-in replacement for a Sharp one?
They're the exact same drive so yes.
Ummm, silly question, but are you moving the switch to "disk" when you try to use the FDS? It will display a grey screen unless the system is switched to disk mode.
Yes I flipped it
Heh, sorry, I said it was a stupid question :D Did you check for a fuse on the FDS side?
Yeah, there's no fuse.
Today I was trying to play with disk mode and I don't have the classic image of Mario and Luigi jumping anymore, I get a gray screen.
Some time ago I closed the pins of the socket because it was very loose and I think that the pins that are facing each other were short-circuiting when there is no cassette placed in the socket.
I think this may have burned a chip on the floppy side of the motherboard. If that were the case, which part of the PCB (which chips) should I check? Is there some kind of fuse or logic gate that could blow due to what you mention? Thank you very much.
I hope this will help to the entire community to solve this problem, cuz I was searching a lot on the internet and couldn't find anyone mentioning that this could be the cause of this grey screen issue on disk mode.