Check the network and signal
- Make sure the printer uses the main network rather than a guest network.
- Move the printer or router temporarily to test whether distance or interference is involved.
- Confirm the Wi-Fi name and password did not change after router replacement.
Check sleep and addressing
- Install printer firmware and manufacturer software from the official source.
- Review energy-saving settings if the printer disappears only after long idle periods.
- A reserved network address can help when computers repeatedly look for an old address.
Avoid duplicate printer entries
- Remove old copies only after identifying the active printer.
- Add the printer by its current network connection rather than repeatedly using automatic discovery.
- Print a network report and keep it for comparison when the issue returns.
Stop guessing when the problem keeps coming back
Ask for help if the printer vanishes daily, reconnects only after a router restart, or several computers create different duplicate entries.