So I bought a C9300-24UX-A for my homelab (not new). It came with a C9300-NM-4G and I also bought a C9300-NM-2Y (dual sfp28) however I cannot get either module to show up in suing "show inventory" and the 25gb module does not ever get a link with the network card.

Anyone have some troubleshooting steps before I ask the seller for a replacement to try getting it working?

I have tried updating the IOS version to latest and latest recommended and neither work, power cycling, inserting/reinserting to no avail so far.

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Edit for things I have tried:IOS Versions: 16.12.8, 17.9.4a, 17.9.5, 17.12.3Cold booting multiple times (at least 5 on 17.9.4a)Reseating the module multiple times

The `show inv` that shows up is (second PSU shows up when plugged in):NAME: "c93xx Stack", DESCR: "c93xx Stack"PID: C9300-24UX , VID: V02 , SN: FJC2402E0EB

NAME: "Switch 1", DESCR: "C9300-24UX"PID: C9300-24UX , VID: V02 , SN: FJC2402E0EB

NAME: "Switch 1 - Power Supply B", DESCR: "Switch 1 - Power Supply B"PID: C3KX-PWR-1100WAC , VID: V02 , SN: LIT17300N9C

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Edit 2 got it to show up in inventory

I think what happened is they shipped it with the module installed, but one of the screws could not be tightened (because of missing threaded insert on the right hand side module slot). This I think caused the module slow to unclip from the board.

I pushed the module slot piece back into the board and presto the module showed up.

I would like to very much thank everyone who responded with helpful checks for me.

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Now onto the fun part, getting it to accept FS SFP28 transceivers and then onto configuring it for my homelab (not complex and shouldn't take long thankfully)

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Edit 3: did the steps for allowing other sfp transceivers, and presto it worked. All good on this front now