Neo geo 1 slot red lines on screen

bartre

Haomaru's Blade Shiner
10 Year Member
Joined
Oct 27, 2009
Posts
681
So I'm helping my buddy with his 1 slot in a dynamo cab.

Occasionally we get one or both of two issues-
1- red horizontal lines that appear and disappear randomly. Pretty sure this is the monitor, as this comes into play with other pcbs

2- red vertical lines and slightly messed up colors.
These lines are static

Any clues where I should start?

Pics- https://imgur.com/a/R7hSm
 

ggallegos1

Cholecystectomy Required.,
10 Year Member
Joined
Oct 1, 2013
Posts
5,153
So I'm helping my buddy with his 1 slot in a dynamo cab.

Occasionally we get one or both of two issues-
1- red horizontal lines that appear and disappear randomly. Pretty sure this is the monitor, as this comes into play with other pcbs

2- red vertical lines and slightly messed up colors.
These lines are static

Any clues where I should start?

Pics- https://imgur.com/a/R7hSm

Your red pot might be going out. Are there any leaking caps or cold traces? What happens when you adjust the red pot?
 

bartre

Haomaru's Blade Shiner
10 Year Member
Joined
Oct 27, 2009
Posts
681
Red pot adjusts red as it should.
I've already reflowed suspect joints.
Caps are on their way.

I tried futzing with the dials, and the contrast dial seems to help with the horizontal lines
 
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