Check the chip at L4 marked ASO4. I'm thinking there's a broken trace that goes right to the cartridge slot.
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Im really hoping I can revive this AES, I'm trying really hard to find the issue, and I'm not the type to give up. So is the next step replacing vram or palatte ram chips? Any further help would greatly help my sanity.
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Don't replace anything yet. I need you to do me a favor..show me aht the screen looks like on the most colorful intro...I believe it has pink in it,etc.
and check the LS244 @ L6 Also check the 531000(LO) @ J5
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Please find the video at https://youtu.be/f3LmhB29rZI
Here is the no cart video, just so you know when turning on before i took this video the screen was solid blue for around 2 secondsThat was good.
Could you youtube the results when you turn it on with no cartridge plugged in with a original bios.
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Here is the no cart video, just so you know when turning on before i took this video the screen was solid blue for around 2 seconds
https://youtu.be/iNHTU8QDnK8
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OK. We are going to stay with the palette ram and area. Check the traces of NEO-B1 chip @E1
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I'm getting more and more frustrated with this, I have checked with the limited knowledge I have, all traces look perfect I have shone a led light from behind and continuity tested what I could and tried again to trace each pin, but I'm failing at that miserably the pin outs and schematics on the neogeo Wiki make no sense to me.
You have 40 more to go which i will give later.Those last 80 were all correct and connected.
Did you even clean the cart slot yet?