Try Before RMA
Before submitting a device for warranty repair (RMA), work through the checks below. Many apparent hardware issues are caused by power supplies, cables, software versions, or configuration — and can be resolved without sending the device back.
Power and boot
| Symptom | What to try |
|---|---|
| Device does not power on | Use a different compatible power supply and/or PoE injector. |
| Device does not boot | Load the backup RouterBOOT: hold the Reset button, power on the device, keep holding Reset for 2–3 seconds. If the device boots, upgrade the bootloader with /system/routerboard/upgrade. If it still fails, reinstall with Netinstall. |
| Device reboots under load | Try a different power supply. Upgrade RouterOS to the latest Stable version. Reset the configuration with /system/reset-configuration. |
| Device reboots without load | Upgrade RouterOS to the latest Stable version. Reset the configuration with /system/reset-configuration. |
Ethernet and SFP
| Symptom | What to try |
|---|---|
| Cannot connect to the device | Try a different port — you may be using the WAN port from the default configuration. Verify the cable and port are not physically damaged. |
| Unable to Netinstall | Ensure a direct Ethernet connection, same subnet, and disabled firewalls. Try placing a switch between the PC and the device. See the Netinstall guide for details. |
| Ethernet port not linking | Try a different Ethernet cable. If PoE-in is used, try a different PoE injector. |
| SFP / SFP+ / QSFP port not linking or low throughput | Ensure both ends of the link are compatible. Use the correct optical cable type (single-mode or multimode). Verify the SFP module is supported. |
LTE
| Symptom | What to try |
|---|---|
| SIM card not recognized | Try a different SIM card. Check the card orientation and ensure it is fully inserted or clicked into the slot. |
| LTE does not connect | Verify the APN is correct. Check your service provider's documentation for the required APN value. |
| LTE connects but no data passes | Verify the APN is correct. Ensure routing and firewall rules allow traffic. |
| Missing LTE interface | Confirm the device is an LTE Kit variant and that the modem is physically installed. |
| LTE modem not recognized | Install the latest RouterOS Stable version. |
Other
| Symptom | What to try |
|---|---|
| LED not working | Install the latest RouterOS Stable version and apply the default configuration. |
| Case is bent or damaged | Inspect the packaging for damage. Shipping damage should be reported to the shipping company. |
info
If none of the above steps resolve the issue, contact MikroTik support with a description of the problem and a support output file (supout.rif).