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R36S won’t boot at all with new microSD + ArkOS, old card works fine

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Post

I’m trying to replace the stock microSD in my R36S, but the new card won’t boot at all. The original 16GB card works perfectly and boots from “R36 Open Source Console” to ArkOS 2.0 and then EmulationStation. For the new card, I followed the R36S wiki instructions and used the recommended MultiPanel ArkOS image. I flashed it with Rufus twice to make sure the flash wasn’t the issue, and both times it completed without errors. However, when I put the new card in the TF1/OS slot, the console does absolutely nothing: no screen, no LED, no boot. If I put the original card back in, it boots normally right away. The new card is a SanDisk Ultra 64GB microSDXC UHS-I. I also tried accessing the original card on Windows to check or copy its boot/DTB files, but Windows only sees it as a 15.23GB RAW partition, so I can’t access those files. Has anyone had the same issue or knows what I should try next?

Intent Score

2

Intent

99

Confidence

skip

Summary

The post is about a handheld console microSD boot issue, not a window replacement or home improvement topic.

Reasoning

This is clearly a software/storage troubleshooting question for an R36S device and contains no meaningful signals of homeowner window repair, replacement, comparison, or cost consideration.

Extracted Signals

  • unrelated_tech_issue
    R36S won’t boot at all with new microSD + ArkOS, old card works fine
  • software_troubleshooting
    I followed the R36S wiki instructions and used the recommended MultiPanel ArkOS image.
  • storage_media_issue
    The new card is a SanDisk Ultra 64GB microSDXC UHS-I.

Model: gpt-5.4-mini · Prompt: v3 · 8/10/2026, 5:01:51 PM