NMminer Stuck at 80%? Here’s How to Fix It

If your NMminer is stuck at 80%, don’t panic. This is a very common setup issue and is usually caused by one of a few simple things.

If you get lost or things feel messy, the fastest way to reset your progress is to reflash the device. You can find all flashing guides here:
https://minermanusa.com/pages/miner-setup-guides

Most Common Causes of “Stuck at 80%”

1. Unacceptable Wallet Address (Most Common — Start Here)

• Not all Bitcoin wallets are the same. There are several wallet formats and protocols in use today.
• Exchange wallets (Coinbase, Robinhood, etc.) are very commonly rejected by mining pools.
• Mining pools can be picky about wallet formats. Some formats are simply not accepted.

Recommended fix:
Generate a paper wallet and keep a printed copy somewhere safe.

Wallets that are known to work can be generated for free here:
https://www.walletgenerator.com/

2. Mining Pool Rejection

Some mining pools no longer accept very low hash-rate devices like NerdMiners and NMminers.

If changing your wallet does not fix the issue, try switching pools in the setup menu.

Known good pools (as of December 2025):

3. Reflash the Device

• If everything above fails, reflashing the device is your best next step.
• Firmware updates are released periodically, and older flashes can cause connection issues.

Follow the flashing guide here:
https://minermanusa.com/pages/miner-setup-guides