K7000 "flickering" Issue

Kyrosfear

Well-known member

Donor 4 years: 2012, 2018, 2020, 2025
Joined
Apr 4, 2012
Messages
3,074
Reaction score
36
Location
Pennsylvania
Gentleman,
I hope this is the right section for this question, but if not, I am sure you guys will let me know. I am just not sure if my monitor is the actual problem, or if it is something else causing this symptom. I have a K7000 in my Neo Geo. When I received this monitor, approximately 3 months ago, I did a capkit and put a new flyback on it. The monitor works and looks great, but there is one small problem and I will do my best to explain it clearly. When the game is on, it almost looks like the power to the monitor is temporarily ( 2 milliseconds) disrupted. Imagine one day you are watching tv and the power in the house flickers. Not long enough to shut the tv off, but enough that you notice the picture momentarily looses power. The phenomenon is not as drastic as that example (infact, many people play this machine and never notice it), but I think it will provide the clearest representation of what I am talking about. Just a slight fluctuation in the picture and this occurs about every five seconds. I hope this will be a good starting point for those of you whose expertise far exceeds my own, but let me know whatever information I can give you to clarify what is occurring. Thank you in advance for your help.
 
I will say this too, which may clarify the problem. I notice this issue the most when games are switching screens (going from a cut scene to game play). To test this further, I beat a game and watched the end credits scroll. Two straight minutes with no flickering. I would imagine this virtually eliminates the monitor as the problem, but my friend also has a Neo Geo and says his does not do this, and it is simply beyond my knowledge.
 
What's the screen look like when coming from a cut scene to game play? Big differences in color like suddenly a bright picture after it not being bright?
 
i would think that the fly/contrast/ brightness/color pots are not adjusted properly.

and it is blasting the image out when going from lite to dark or a flash happens in the game and the chassis is overwhelmed and flickers like he is describing.

try turning down the fly, brightness and contrast pots and see what happens.

if it goes away or stops then you will need to readjust/wite balance it again.

just my thoughts on what is happening. i have seen it before and that is what i did to stop it.

Peace
Buffett
 
I am having a similar issue on a 7000 in another thread. check your B+ and see how much it flucuates as the screen changes.
 
No, the color stays perfect and the brightness never changes. I turned down the flyback, and from what I can tell, that helped. Thanks for the advice. Paul, I am also going to check the B+ this weekend when I get some more time so I appreciate your suggestion.
 
solderr joints issue.. possible flyback issue(krappy pot internal), pcb issue....

but lately ive ran into more than one game with weird video issues like that because the games pcb edge connector had a poor connection.
 
I've seen games that did that too... usually I saw it on G07's though, when the B+ was low. If you turned your fly down and it helped it, you actually lowered the B+ even more, so I don't know why that would do it. Maybe though.
 
Back
Top Bottom