How do I tell if the problem is the Wi-Fi module or the router?

Plug an Ethernet cable into the TV LAN port. If the internet works over the wire but not over Wi-Fi, the fault is almost certainly in the Wi-Fi module or its antenna cable inside the TV.

How much does a Wi-Fi module replacement cost?

We only quote a firm price after on-site diagnostics — it depends on the TV model and module availability. We agree the estimate before any work begins, and if you decide not to proceed the TV goes back with no obligation.

Can you fit a more powerful Wi-Fi module?

Generally no — the TV firmware only recognises a specific module model. We install the original or a compatible equivalent that is guaranteed to work with your TV software.

Why does my TV drop Wi-Fi after 20–30 minutes?

That usually points to the Wi-Fi chip overheating — the IC reaches its thermal threshold and temporarily shuts down. Service diagnostics will confirm the thermal issue and the module can be replaced if needed.

What warranty do you give on Wi-Fi repairs?

All Wi-Fi module repairs and replacements carry a 3-month warranty. If the same problem recurs within the warranty period we redo the work at no charge.

TV not connecting to Wi-Fi — repair in Riga

If your Smart TV can no longer see your home Wi-Fi network, keeps dropping the connection or cannot complete the handshake, the fault can be software- or hardware-related. At the SATER service centre on Silmaču iela 6 we have been diagnosing and repairing TV wireless modules across all brands since 1993.

3-month warranty

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Modern Smart TVs rely on an internal wireless module for Wi-Fi connectivity. In Samsung and LG sets this is typically a discrete PCB with a Broadcom or MediaTek chip connected to the mainboard via USB or SDIO, while Sony and Philips often integrate a Wi-Fi/Bluetooth combo chip directly on the mainboard. The module communicates with the router through an internal antenna — a thin coaxial cable or a printed PCB antenna. If the module or its antenna cable is damaged, the TV either sees no networks at all or shows them with extremely weak signal strength and cannot maintain a stable connection. In some cases the problem is a firmware corruption that has broken the network driver stack, or a MAC address conflict on the network after a router swap. We run diagnostics on site — checking module recognition at the system level, measuring the antenna signal strength, and if necessary replacing the Wi-Fi module with a new original or compatible substitute. We always agree a firm estimate before work begins. The unit must be brought in person during opening hours.

Likely causes

Wi-Fi module failure (common in Samsung/LG) — The internal wireless module with its Broadcom or MediaTek chip has failed — the TV cannot see any Wi-Fi network or loses the connection within minutes.
Antenna cable disconnected internally — The thin coaxial antenna cable has come loose from the Wi-Fi module connector — the TV sees networks with extremely weak signal or not at all.
Firmware corruption — A failed update or a power cut during the update corrupted the network driver stack — Wi-Fi settings are unresponsive or show an error code.
MAC address conflict on the network — A router change or network reconfiguration has created a MAC address conflict — the TV authenticates but never receives an IP address from the DHCP server.
Overheating of main board wireless chip — The integrated Wi-Fi/BT combo chip on the mainboard periodically overheats and drops the connection — the symptom usually appears after 20–30 minutes of operation.

What you can check yourself

Restart both the TV (unplug for 2 minutes) and the router — this resolves the majority of transient connection issues.
Check whether other devices (phone, tablet) can connect to the same Wi-Fi network — if not, the problem is the router.
In the TV settings forget the network and reconnect from scratch, entering the password manually.
If the TV has a LAN port, plug in an Ethernet cable — if the internet works over the wire, the Wi-Fi module is the prime suspect.
Perform a full Factory Reset — this can clear firmware-level network stack corruption.

When to bring it in

If after these checks the TV still cannot connect to Wi-Fi or the link is unstable, professional diagnostics are needed. We check Wi-Fi module recognition at the system level, measure antenna signal strength and test the connection with a reference router. A faulty module is replaced with an original or compatible substitute, and we verify long-term connection stability after the swap. All work carries a 3-month warranty. Bring the TV to Silmaču iela 6.

Fast on-site diagnostics. Repair warranty: 3 months.

Affected brands

Samsung LG Sony Philips TCL Hisense Xiaomi Toshiba

Frequently asked questions

Why customers choose SATER

From CRT to the latest Smart TVs. We repair televisions of every era — from tube sets to OLED and QLED.
LED backlight diagnostics on a professional test rig. We pinpoint the faulty LED strip without replacing the entire panel.
Samsung, LG, Sony parts in stock. Power boards, T-Con boards, LED drivers — key components always on the shelf.
30+ years of experience. The service centre has been operating since 1993.
We serve all of Latvia. Our service centre is in Riga and we accept devices from anywhere in the country.