- TVs
- Smart TV
012
TCL error 012 on Smart TV: wired Ethernet connection issue
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Error Code 012 (and related Error Code 013) on a TCL Roku Smart TV indicates a wired Ethernet connection issue. Make sure the Ethernet cable is fully seated at both ends, try a different cable or router LAN port, restart the TV and router/modem, and test Wi-Fi to confirm internet service.
Safety first
Stop and check this first
- Always try Home > Settings > System > Advanced system settings > Network connection reset before considering a full factory reset, since a factory reset erases all settings and requires the owner to sign back in.
Safe checks you can perform
- Reseat the Ethernet cable at both ends and test another cable or router port
- Confirm internet service on a phone/computer or by switching temporarily to Wi-Fi
- Restart the TCL Roku TV from Settings and power-cycle the modem/router for 30 to 60 seconds
- Run a Network Connection Reset from Advanced system settings
Leave these tasks to a qualified professional
- Do not attempt this professional task: ISP service and router check when upstream internet or router ports fail
- Do not attempt this professional task: TCL Support assistance if wired Ethernet fails while Wi-Fi and other devices work
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
ISP service and router check when upstream internet or router ports fail
What they doIf other devices cannot browse or wired errors continue after reseating the Ethernet cable and restarting the router, your ISP checks the line and router hardware.
They must show youwhether other devices on the same network can browse and the result after unplugging the modem/router for 30 to 60 seconds.
In writingthe ISP line check findings and router LAN port status.
TCL Support assistance if wired Ethernet fails while Wi-Fi and other devices work
What they doWhen internet works over Wi-Fi and on other devices, but Error Code 012 or 013 remains after trying another Ethernet cable, router port, restart, and Network connection reset, TCL Support reviews the TV.
They must show youyour TCL Roku TV model number, software version, and the 012 or 013 screen with a tested Ethernet cable attached.
In writingthe TCL Support case reference, the cable and Network connection reset checks performed, and the recommended service action.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Reseat the Ethernet cable at both ends and test another cable or router port
- Who:
- you, checking the back of the TCL Roku TV and your router.
- How:
- make sure the Ethernet cable is fully seated in both the TV and the router. Unplug and reconnect the Ethernet cable at both ends, and try a different Ethernet cable or a different router LAN port if available.
- Result that matters:
- a secure physical link that lets the TCL Roku TV connect without showing Error Code 012 or 013.
- If reseating or swapping the Ethernet cable restores the connection:
- a loose plug, bad cable, or router port caused the error.
- If Error Code 012 or 013 remains with another cable and port:
- check whether other devices have internet and restart the TV and router.
- Evidence to keep:
- photo of Error Code 012 or 013 on screen and a note of which Ethernet cables and router ports were tested.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Confirm internet service on a phone/computer or by switching temporarily to Wi-Fi
- Who:
- you, using a phone or computer and the TV remote.
- How:
- check whether your internet is working on a phone or computer on the same network, and if Wi-Fi is available, temporarily switch the TCL Roku TV to Wi-Fi to confirm that internet service is active.
- Result that matters:
- verifying whether household internet service works or whether there is an ISP or router outage.
- If other devices and temporary Wi-Fi connect fine:
- the issue is isolated to the wired Ethernet link.
- If nothing on the network connects to the internet:
- restart the modem/router and contact your ISP if service stays down.
- Evidence to keep:
- test results from browsing on a phone or computer and switching the TV temporarily to Wi-Fi.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Restart the TCL Roku TV from Settings and power-cycle the modem/router for 30 to 60 seconds
- Who:
- you.
- How:
- restart your TCL Roku TV via Home > Settings > System > Power > System restart > Restart. Unplug your modem/router from power for about 30 to 60 seconds, plug it back in, and wait for it to fully reconnect before testing again.
- Result that matters:
- the TV and router establishing a fresh wired network session and restoring internet access.
- If restarting the TV and router clears the code:
- a temporary router or system hang caused the error.
- If the TV used to connect fine but still fails after restarting:
- run a Network Connection Reset.
- Evidence to keep:
- confirmation that System restart and a 30 to 60 second modem/router power cycle were completed.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Run a Network Connection Reset from Advanced system settings
- Who:
- you, with the TCL Roku TV remote.
- How:
- if your TV used to connect fine but now will not, go to Home > Settings > System > Advanced system settings > Network connection reset > Reset connection, and then reconnect.
- Result that matters:
- clearing stubborn network settings on the TCL Roku TV without performing a full factory reset.
- If the wired connection succeeds after Reset connection:
- cached network settings were blocking the link.
- If Error Code 012 or 013 continues after Network connection reset and cable swaps:
- contact your ISP or TCL Support.
- Evidence to keep:
- connection test result after running Network connection reset > Reset connection.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- TVs
- Brand
- TCL
- Product type
- Smart TV
Known code variants
- Código de error 012
- Código de error 013
- Error 012
- Error 013
- Error Code 012
- Error Code 012 (Ethernet)
- Error Code 013
- Sungrow 012
- Sungrow 012 corriente de fuga
- Sungrow 012 leakage current
- Sungrow código 12
- Sungrow error 012
- Sungrow excess leakage current
- Sungrow fallo 12
- Sungrow fault 12
- Sungrow fault code 12
- Sungrow fuga a tierra
- Sungrow leakage fault
- TCL Roku TV error 012
- TCL Roku TV error 012 Ethernet
What it means
According to TCL North America official troubleshooting for TCL Roku TV models (settings and menu paths may vary by model and software version), Error Code 012 (Ethernet) and Error Code 013 (Ethernet) appear during setup or streaming when a wired network connection fails between the TV and router. Seeing code 012 or 013 only points to a wired link or upstream routing issue and by itself never proves that the TV Ethernet port or main board has failed.
Warnings and stop conditions
- Mediumeditorial warning
Always try Home > Settings > System > Advanced system settings > Network connection reset before considering a full factory reset, since a factory reset erases all settings and requires the owner to sign back in.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Symptoms and causes
Probable causes · in order
- Loose, damaged, or faulty Ethernet cable or router LAN portCommon
The Ethernet cable is not fully seated in the TCL Roku TV or router port, or the specific cable or router port being used has a physical link issue.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
- Stalled wired network session on the TCL Roku TV or router/modemPossible
The wired network state between the TV and router needs a system restart or a Network Connection Reset to clear cached connection parameters.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
- ISP outage or router upstream internet disconnectionLess common
The router has lost its upstream internet connection, preventing both wired Ethernet and wireless devices on the same network from getting online.
Evidence: Getting Error Codes When Connecting to Your Wireless Network
Virtual technician
Does 012 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Getting Error Codes When Connecting to Your Wireless Network
TCL · 2026 · official_doc
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