Hello,
I recently purchased two as-is AES consoles from eBay.
I have been able to get one of them working, but the second one is still giving me some major problems.
-I have a Unibios installed and with no cartridge inserted, I get what I think is a green screen, but the color is quite bad, so it's possible it is a yellow screen. The pixels look like they actually alternate green/yellow across the screen.
-If I try to do the Unibios system test, I can see that something is happening, but I cannot read any of the text.
-With a cartridge inserted, I get what I can barely make out as the Unibios boot screen, then I can hear the Neo Geo intro screen, but can't see anything. The screen is all white.
-The game will boot up and I can see some graphics and the controls and sound work perfectly. I can even access the Unibios menu and enable cheats, etc.
I have tested both RGB and composite output from the AV port and directly from the Sony converter chip and other RGBS tap points, but the same display issues arise.
I have tested the Palette RAM chip continuity and all of the pins seem to be connected correctly, and the same with the VRAM chips.
I'm afraid the chips themselves may be kaput and need to be replaced completely.
Does anyone have any other ideas about what may be going on? Any help would be much appreciated.
Here is a link to a small album with some example:
http://imgur.com/a/vnBtP
Edit: I forgot to mention that the board is a NEO-AES 1st revision with the daughter board.
I recently purchased two as-is AES consoles from eBay.
I have been able to get one of them working, but the second one is still giving me some major problems.
-I have a Unibios installed and with no cartridge inserted, I get what I think is a green screen, but the color is quite bad, so it's possible it is a yellow screen. The pixels look like they actually alternate green/yellow across the screen.
-If I try to do the Unibios system test, I can see that something is happening, but I cannot read any of the text.
-With a cartridge inserted, I get what I can barely make out as the Unibios boot screen, then I can hear the Neo Geo intro screen, but can't see anything. The screen is all white.
-The game will boot up and I can see some graphics and the controls and sound work perfectly. I can even access the Unibios menu and enable cheats, etc.
I have tested both RGB and composite output from the AV port and directly from the Sony converter chip and other RGBS tap points, but the same display issues arise.
I have tested the Palette RAM chip continuity and all of the pins seem to be connected correctly, and the same with the VRAM chips.
I'm afraid the chips themselves may be kaput and need to be replaced completely.
Does anyone have any other ideas about what may be going on? Any help would be much appreciated.
Here is a link to a small album with some example:
http://imgur.com/a/vnBtP
Edit: I forgot to mention that the board is a NEO-AES 1st revision with the daughter board.
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