NaoChiTri Constantly rebooting while trying to load games

shadowblind · Mar 5, 2026

Hey there!

I recently purchased a Naomi netboot setup from a member on the forum. When I got it, I found that the NaoChiTri constantly keeps restarting when it tries to load any BIN, including the ones the seller sent with it. Sometimes it loads a quarter way through, sometimes none at all, but it always restarts. I've contacted the seller for their help, but they've ignored me for weeks now, so I'm coming to the forum. Has anyone had this issue before on a NaoChiTri netboot setup? It was working for a few days (only with Ninja Assault, but still worked with that game), then got this constant rebooting error. I've replaced the power supply, double-checked all cables, changed the roms, no luck. The Naomi itself seems fine, so I'm out of ideas. Any help would be appreciated!

Mike

nem · Mar 6, 2026

It's usually a DIMM board issue, likely memory related. Start with a DIMM board test. You can do it from the Naomi service menu.

If DIMM STATUS shows bad, try reseating the memory stick(s) inside the board. If reseating doesn't help, try replacing the sticks.

There's a thread for compatible memory below:

Thread 'Those of you with 512MB and 1GB DIMM boards...'

Apr 18, 2016

Those of you with 512MB and 1GB DIMM boards...
Would you mind looking to see the model number of the memory chips you have in your DIMM board and posting it here?

It'd be nice if we could compile a list of compatible DIMMs for upgrade/repair purposes.

I have 4 DIMM boards in my collection, 2 of them are regular dims that have 2 128MB Samsung DIMMs the other two are Net-DIMMs that each have a single 256MB memory DIMM

One of the Net-DIMMs has no model number markings on it but the other has a Samsung M366S3323CT0-C7A DIMM.

According to the very brief blurb on the Arcade Otaku wiki...

shadowblind · Mar 6, 2026

Thank you! I'll give it a test run and report back...

shadowblind · Apr 4, 2026

Okay, been a minute but I finally got to setting it up. The power supply works great, I replaced the RAM completely, the DIMM tested all good. But it hasn't solved the rebooting issue. It does seem my DIMM is 3.17, not the 4.02 the seller said it was. Would that be enough to cause the issue?

Some games begin to load, some games get halfway on the progress bar, and some don't even begin to load at all. No idea what is causing this.

Complete side note but I'm also running the Naomi on a Big Blue cab and just can't lock the vertical sync in. It's so slow that it takes a couple seconds to for a roll to complete, but I can't get it to stay completely still. It does in the NAOMI test menu, however, for whatever reason...

nem · Apr 5, 2026

You say the power supply is great, I assume you have verified that the +3.3V and +5V are in line?

shadowblind · Apr 5, 2026

nem said:
You say the power supply is great, I assume you have verified that the +3.3V and +5V are in line?

Yup, I bought a HAPP 44-1095-00 and have verified that it's voltage lines are right on target.

This one: https://na.suzohapp.com/products/accessories/44-1095-00

nem · Apr 5, 2026

Where are you measuring the voltages from?

shadowblind · Apr 5, 2026

nem said:
Where are you measuring the voltages from?

Measuring them at the JST connectors while it's under load (trying to load the game). They sit at 5.10v and 3.33v.

nem · Apr 5, 2026

From the filter board? Those voltages are in line then.

shadowblind said:
It does seem my DIMM is 3.17, not the 4.02 the seller said it was. Would that be enough to cause the issue?

No. 4.0x just adds CF loading.

Do you have a Windows computer you could try netbooting from?

I wrote the tutorial below for Triforce, but the same steps apply for Naomi too. Skip the part about dipswitches since yours are already set correctly. Configure the network settings on the Naomi and your PC and then try using transfergame to netboot any Naomi game.

Post in thread 'Updating a Triforce Type 3 to use CF cards, tutorial'

Aug 25, 2021

Part 2: Netbooting the hacked CF BOX firmware

Take off the Triforce motherboard cover and flip the second dipswitch on SW1 to ON. The first dipswitch is there to control the memory 512MB/1024MB (ON/OFF), the second for NETWORK/DRIVE (ON/OFF). Remove the security key and insert your freshly burned zero pic key. Make sure it's correctly oriented. If you have a battery, unplug it. You can unplug the GDROM drive too.

Take a crossover ethernet cable and connect it to the LAN port on the Triforce and the LAN port on your computer.

Turn on your cab. It should boot to...