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Troubleshooting guide

Common Power Supply Board problems

The 5 failures our Durban technicians meet most often — what you'll see, why it happens, and how we fix it properly.

Every fault below comes from real call-outs across Durban and surrounding areas. Some have a quick check you can try yourself before booking anyone — where that's true, we say so. When a visit is needed, the diagnosis is done with a signal meter, quoted before work starts, and covered by our 12-month workmanship warranty. New to this part? Start with the power supply board component guide.

1. TV won't turn on at allNo standby LED

What you'll see: No standby light, no sound, no picture — the TV is completely unresponsive to the remote or the power button.

Why it happens: A failed power supply board, blown fuse, or failed capacitors preventing the board from starting up at all.

How we fix it: We test the board with the TV isolated, identify the failed stage, and repair or replace the power board — then confirm a clean startup under load before we call it done.

Full tv won't turn on at all troubleshooting guide →

2. TV clicks but wont start

What you'll see: A faint click or pop from inside the TV every time you try to switch it on, then nothing.

Why it happens: Bulging or failed electrolytic capacitors on the power board — the classic "capacitor plague" pattern, common after years of surge exposure.

How we fix it: Capacitors are visually inspected and tested, then replaced with correctly rated parts — usually one of the most affordable and reliable repairs a TV can have.

Full tv clicks but wont start troubleshooting guide →

3. Standby light on but nothing happens

What you'll see: The standby LED glows normally, but pressing power does nothing — no backlight, no sound, no boot sequence.

Why it happens: The standby rail on the power board is healthy but the main rail (which powers the mainboard and backlight) has failed, or the mainboard itself is not sending a start signal.

How we fix it: We measure each rail under load to isolate power-board vs mainboard, then repair the actual fault rather than guessing.

Full standby light on but nothing happens troubleshooting guide →

4. TV powers off by itself

What you'll see: The TV turns on fine but shuts down after minutes or hours, sometimes worse when it is warm.

Why it happens: A power board protection circuit tripping on a marginal rail, overheating capacitors, or a failing component that only fails once warm.

How we fix it: We run the TV under real load and thermal-test the board to catch heat-dependent faults that a quick bench test would miss, then repair the specific failing stage.

Full tv powers off by itself troubleshooting guide →

5. Burning smell or visible damage

What you'll see: A burnt smell from the TV, scorch marks on the board, or a component that has visibly failed.

Why it happens: A component failure severe enough to overheat or char — often triggered by a surge, but sometimes a slow failure that finally let go.

How we fix it: We isolate the TV immediately, assess the extent of damage (board-only vs collateral damage to the mainboard), and give an honest repair-vs-replace call before any work proceeds.

Full burning smell or visible damage troubleshooting guide →

Symptom doesn't match any of these?

Faults overlap — a "power supply board problem" is sometimes another link in the chain wearing a disguise. Describe what your system is doing on 069 423 8290 (or WhatsApp a photo of the error screen) and we'll tell you which component it actually sounds like, free, before anything is booked.

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