Neo Geo CD, works until I screw it together...

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Kujako

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So I have a kinda beat up Neo Geo CD, original top loading unit. Everything works, until I screw it back together. Then I get no sound, no video. Take it back apart, and it's working again. Problem seems to be isolated to the front IO board (where the controllers connect).


Any ideas?
 
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titchgamer

titchgamer

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I would check for anything being crushed/pinched or bent out of shape when you tighten the 2 halves back together.
Also look for any shielding etc being not seated properly.

Never stripped a NGCD so dont know any specifics to look for sorry.
 
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Kujako

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titchgamer said:
I would check for anything being crushed/pinched or bent out of shape when you tighten the 2 halves back together.
Also look for any shielding etc being not seated properly.

Never stripped a NGCD so dont know any specifics to look for sorry.
Click to expand...

This is before the two halves are back together. This is just screwing down the PCBs to one half of the box, leaving the CD drive disconnected. It's kinda weird.
 
titchgamer

titchgamer

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Kujako said:
This is before the two halves are back together. This is just screwing down the PCBs to one half of the box, leaving the CD drive disconnected. It's kinda weird.
Click to expand...

Is the PCB bending at all? Maybe putting pressure on a joint or a broken trace?
 
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Kujako

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Weird, went together without issue this time. About the 5th time I've tried, so I guess going one screw at a time was the trick? Seems odd, but closing it up before it changes it's mind.
 
titchgamer

titchgamer

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Kujako said:
Weird, went together without issue this time. About the 5th time I've tried, so I guess going one screw at a time was the trick? Seems odd, but closing it up before it changes it's mind.
Click to expand...

It is indeed odd, I suspect thats a fault that will rear its head again in time!
 
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Kujako

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titchgamer said:
It is indeed odd, I suspect thats a fault that will rear its head again in time!
Click to expand...

What I THINK happened, is that I didn't have the right screws in the right holes. The Neo Geo CD uses three different screw lengths, all with the same threading. I think I got them sorted wrong on all but the last assembly attempt. Now why that should mater, not sure. Could be a grounding issue (but then why did it work without screws).
 
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