NeoGeo AES first run picture issue

b3l0kk

Timid Neo Newbie
Joined
Nov 6, 2021
Posts
1
Hello,

I have a US AES NEO GEO first run that gives me a weird Yellow screen during the diagnostic test. I replaced the VRAM but I am still getting the same problem with the background graphics not showing up. Sound is perfect. I don't know where to go from here. I checked the board over thoroughly several times and cannot find any trace damage. The board is really clean. I attached a photo of what I am seeing when I turn it on without a game. I would appreciate any insight anyone can provide. If you need me to provide more pictures (board view, game running etc..) let me know. Thanks!
 

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Last edited:
Joined
Aug 30, 2001
Posts
349
Assuming you replaced both VRAM chips, I'd check the LSPC next for potentially a short due to a solder bead around its legs.

Next, being a first run board, does it have the PL241S daughter board? A bad solder there might also cause an issue.
A good way to test if this is causing an issue is to connect using a SCART cable.

2c5e9hiu.jpg

Pics of your board might help.
 

Xian Xi

JammaNationX,
Joined
Dec 1, 2005
Posts
27,702
Which VRAM chips did you replace, this would be for the main VRAM and not the fast VRAM.
 
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