Netdimm - Not recognized

[8lall0]

Hello,
since my previous thread (still in TODO) i understood that my netdimm is not working, cartridges are working fine.

When i insert the netdimm, only two leds on the bottom board lights up, and the naomi (also the naomi 2) error 01 is still present.
Leds on the daughter board lights up for an instant and then turn off.

I have multibios in japanese mode, as shows in the test mode.

Test mode says "unknown cart".

Where i can start a diagnosis?

Thanks a lot!

 

[8lall0]

* bump *

 

[Ace`]

Replace the buffer on the bottom think it's a 16245 off the top of my head and the tsop flash chip with a known good one. If doesn't fix it that's likely game over, as it will be a bad bga connection on one of the custom chips or the chips themselves.

 

[mR_CaESaR]

Yeah the first thing I would do would be to change the buffer chip.

I written a quick process of what I did here - https://thingsgeek.net/sega-naomi-netdimm-and-normal-dimm-repair/

Check your firmware by doing a DIMM board test and if it "times out" and shows 0.00 on the firmware, you would definitely need to replace your BIOS flash

Another quick article here - https://thingsgeek.net/upgrading-naomi-dimm-f-w-upgrade-from-1-02-to-4-02/

That being said, if you don't have the necessary tools, it makes things a little difficult.

 

[8lall0]

Yeah the first thing I would do would be to change the buffer chip.

I written a quick process of what I did here - https://thingsgeek.net/sega-naomi-netdimm-and-normal-dimm-repair/

Check your firmware by doing a DIMM board test and if it "times out" and shows 0.00 on the firmware, you would definitely need to replace your BIOS flash

Another quick article here - https://thingsgeek.net/upgrading-naomi-dimm-f-w-upgrade-from-1-02-to-4-02/

That being said, if you don't have the necessary tools, it makes things a little difficult.

I ordered the buffer chip, i'll see if anything changes thanks.

I ordered also a tsop48 adapter for my t48.

I'll update on this post, thanks a lot!