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Does anyone know of compatible part number to replace the optical sensors in a Happ P360? I have two of them with bad directions and I'm trying to source a replacement. I may end up having to just crack open various ball mice to try and find some good pairs.

I'd like to downgrade my Fighters Impact A to plain Fighters Impact, and my Psychic Force to Psychic Force EX, tried just burning the new revision roms for PFEX and it will boot loop to a green screen, assuming there's protection chips at play here?

I was sent donors for cart conversions and I received basically two carts stacked on each other, the top one being World Series 99 with no IC22 and the bottom cart is Dynamite Baseball with IC22. Dumped the IC22 and it has both games on it. I'm wondering if this was some kind of 2-in-1 that...

Hey I have Jackie Chan I converted to Fists of Fire that will sometimes boot loop with a Check G errors or will occasionally error out mid game. I'm revisiting this now since I'd like to bring my board to Evo but not if it's going to be this inconsistent. Does anyone know what Check G is...

So Lethal Enforcers video is flipped because the cabinet used a mirror. Is there any kind of romhack/hardware hack that exists that I can flip the signal to play on a normal tube with my supergun? If I was using an arcade monitor I'd just flip the yoke wires but that's not something I want to do...

Hey so I've been messing with psikyo conversions a bit. But the snag I hit on the PS3-V1 boardset seems to be the 93LC56 eeprom. I can't find any other reason that my Strikers 1945-II to Daraku Tenshi conversion has failed. When I boot in debug mode I can see a black screen with a red box (so...

So I decided to spring for the more expensive Wei-ya universal with the remote board, instead of the sub-$60 chinese clone I was using before. But it seems I still have the same problem where brightness/color shifts depending on what's being displayed. Does it on all Jamma boards, I even input...

I'm in need of a JST female to female harness for the 60 pin connector so I can hook up a Sega JVS Type 3 to the taito i/o conversion pcb. Do these exist premade, or am I going to have to crimp my own?

Repair: traced issue back to U32, replaced U32, would boot but video cuts out before rom test, replaced revision roms and replaced U45 and U47, boots. e: I actually backtraced it going back to U32 as well, so I might try removing that resistor to see if it removes the short tomorrow then...

e: Got one of yaj for around $80, a bit more than I would have liked but oh well. Looking for the K91X1097C PCB so I can run JVS and Fast I/O off the same Jamma harness. It's this board on the top

I just picked up a SFEX2 ZN2 off eBay, shown working but arrived non-working. I don't get a picture or sound, I've tried booting with dipswitch 2 on it and nothing shows up. I've reseated the rom board, cleaned the jamma edge, tried two different jamma setups etc. Are these boards super picky...

I have a suicided b-board running decrypted roms that has graphic issues. I really don't know if it's the connection to my a-board or what. I've had it run perfect for short periods of times, but the sprites would slowly start corrupting over time. I left it overnight, booted it and it was fine...

Just a quick question, I have a UMK3 pcb coming in soon and I was wondering if anyone knew of a spot to grab line level audio from for a supergun setup. I'm assuming the Jamma output will be amplified, not sure if the test menu volume adjustment will be enough. I guess I may have to finally add...

So I dunno what's up but on my CRT I will get these dark horizontal bars across the screen around big images like the CVS2 logo or capcom logo. Also my capture card can't capture the RGBS signal directly, with a sync cleaner I get an unstable picture. here's a video, you can see the darkened...

Are there any special requirements for it to work? I've tried putting it in fast and slow and I can't seem to get it to work. Edit, solved: Apparently if you have B4 wired up to your Jamma connector and kick harness (like if you're using a Sega JVS I/O like me) it does not like seeing that...

So I have a normal dimm running 4.02 and I only get a black screen when I have anything plugged into the scsi port. My Naomi has a multibios in it.　I'm using a generic naomi psu (non sun) but I've seen it boot a netboot naomi so it should be sufficient. With nothing plugged into the dimm I get...

I'm just wondering what this status is on these boards. Is it possible to burn say SF EX1 Plus or EX2 Plus roms to upgrade an existing EX1/EX2 to their respective plus versions?

e: Nevermind I'm an idiot, needed to plug the cart in firmly. So I just got this CPS3, basically got it in unknown condition. Honestly looks like it's been in a box since 98. When I power the board on I get this screen full of garbage. Just wondering if anyone knows off hand why it would do...

Hi, I'm planning on consolizing a Naomi soon and would like to mount my i/o board inside the Naomi case. I'm going to be using an external psu so I was wondering if there would be any issues pulling 5v and 12v from the back of the filter board from, I suppose CN1, to power the i/o? Also just...