What's new
Hi. I photographed the damage on the board. Do you know what this contact affects/means, what is it for? Naomi still working. Most likely it appeared when I wanted to connect Naomi to the TV through a chinese adapter (vga to hdmi). There was a burning smell. I immediately turned off Naomi. Then I connected it back to the old TV and everything seems to work. but at that moment my sf card 1gb Sandisk stopped loading almost all naomi/aw games. it only runs dolphin blue and some naomi games. I don't know if this is a coincidence or not.


  • 65816E27-0013-404A-8753-A7F0C2A82BDB.jpeg
    130.1 KB · Views: 92
  • 92A9BE08-80C3-46B0-964B-99EC73D1906B.png
    452.6 KB · Views: 92
  • 0FB64A82-C074-4223-9A51-DFB1419653A3.jpeg
    182.3 KB · Views: 86
  • 4FE8C69B-13B8-4973-AB7C-D94C5B5F517F.jpeg
    239.6 KB · Views: 93
I also wanted to ask about Dimm, I found damage. can they somehow influence?


  • 0347801F-FC4E-44A9-98DC-8793E83B72B2.jpeg
    162.5 KB · Views: 82
  • 5521A255-D92C-48A9-B05C-98362D6ADBB1.jpeg
    228.9 KB · Views: 81
I think you need to get a new DIMM and maybe a new NAOMI. Looks like a lot of current has gone places where it should not.
Last edited:
Get rid of that VGA to HDMI adapter also.
That's what happens when you hook up to something that has a live chassis. This is the kind of damage seen when an arcade game board is hooked to a monitor in a cabinet that requires an isolation transormer, but doesn't have one installed. It feeds voltage back through the video cabe linto the PCB and does damage.
I think you need to get a new DIMM and maybe a new NAOMI. Looks like a lot of current has gone places where it should not.



  • 0782F2BF-4C56-4460-9104-FDC75510C024.jpeg
    155.9 KB · Views: 73
  • 8ABE119D-1371-4C30-AD85-750F80F2D2AA.jpeg
    169.9 KB · Views: 69
Where is the supercap located?

The mobo has a sticker stating "danger of explosion if the battery is replaced incorrectly". What can explode?

A new one to add to the repair log / list, haven't seen this one before.

Naomi 1 boots up but gets stuck on error 1 and test switch doesn't work, dip switches are also stuck on. Traced the dip switches all the way to the other end of the board to a 315-6146 custom chip. Thankfully the issue was the ram IC46 (62256) used by the custom and not the custom chip itself. Original ram was 70ns, I only had a 100ns ram on hand but it seems to work fine with the slightly slower one.