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Yeah I am not lucky , 😢Anyway thank you to continue to help me.
The multi MVS cart purchased, is from the last batch from December, from Save your game. I guess the last firmware is installed inside so I didn’t install anything and just add the games file at the root of the sd card.
I will make videos of the issue and add some picture of the mother board
 
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Pleae found some picture of the MV
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@raffy92 can you confirm with a Multimeter that you are giving the motherboard proper 5v power?
I do not trust the small/cheap voltmeter on your jamma fingerboard, unless you have personally confirmed it was calibrated properly.

If you have not calibrated it, there is a small potentiometer on the back side that you can use to adjust the readout.
 
Hi, thank you for the comment. I didn’t calibrated I don’t know how to do. I tried to mesure voltage on the jamma with a meter but I could not , between gnd and +5 . Maybe I wasn’t at the right position to mesure. On the back side there is a small potentiometer? How can we use it ? Ok I will check to found a procedure .
 
You mean on the back side of the super gun . Yes there is a hole and a potentiometer that can be turn using a small screw driver . Is it what meant ? I didn’t touch it yet . If I should not believe the jamma meter how can I mesure a proper voltage ?
 
You should measure your voltage with your multimeter. What multimeter do you have?
 
The brand is Sanwa , it is a small one I don’t if it is good or not
 
Can you send a picture of the multimeter or a link to page that has the same one?
 
Just got my cart in today maybe its a dumb question but do they already come with the latest menu and firmware?
 
Ok I will try again to mesure the voltage. How to take it ? Between gnd and +5, but where exactly ?
 
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