What is the right order to restart my modem and router?

Restart the modem first, then the router, and reconnect your computer or other devices last. For the ASUS ZenWiFi EBR63, the manual gives this sequence: turn off and unplug the modem; turn off the router and computers; reconnect and turn on the modem, waiting two minutes; turn on the router, waiting two minutes; then turn on computers. [S1]

Those two-minute waits are the manual’s instructions for that model—not a universal timing guarantee. If your provider or equipment manual gives different steps, use the instructions for your own setup. Don’t press a button labeled Reset just to carry out a restart.

After turning the modem back on, allow it to start before powering on the router. Then give the router time to start before turning on your computer. The EBR63 manual tells users to check that coaxial and Ethernet cables are connected properly and to look at WAN/LAN indicator lights. [S1]

For example, if the router is on but your computer still reports no internet, check that the modem and router have power and that the cables are seated at both ends. Look at the indicator lights and note what they show. Light meanings vary by equipment, so use your own manual rather than treating one color or pattern as universal. If the lights or setup status do not clarify things, record what you see for your internet provider or equipment support.

No. A restart turns equipment off and back on; it is not the same as restoring factory settings. ASUS says that factory restoration for the router example on its support page clears router settings, which then have to be configured again using Quick Internet Setup. [S2]

So, if your goal is simply to try the modem-first power sequence, don’t use the factory-reset button. The ASUS reset procedure is model-dependent, and its support page advises consulting the equipment manual before using a reset button. [S2] If you are unsure whether a control is for restarting or restoring settings, check the label and manual first.

Use this checklist, adjusting the sequence or waits if your equipment manual says to do something different:

1. Turn off and unplug the modem; turn off the router and computers. [S1]
2. Check that the coaxial and Ethernet cables are connected properly. [S1]
3. Reconnect and turn on the modem; for the EBR63 sequence, wait two minutes. [S1]
4. Turn on the router; for that sequence, wait two minutes. [S1]
5. Turn on your computer and check the WAN/LAN lights and setup status, using your equipment’s manual to interpret them. [S1] [S2]
6. Do not use a factory-reset button as a substitute for restarting; factory restoration can clear settings. [S2]

If it still does not connect, copy this note for support: “Equipment: [modem/router models]. Restarted in this order: [steps]. Waited: [times]. Lights or setup status: [observations]. Cable connections checked: [yes/no]. Result: [what still does not work].” This records observations without assuming what caused the issue.