Sony TV Keeps Turning On and Off: How to Fix

A Sony TV that keeps turning on and off is most often caused by a power or standby problem, a software/firmware glitch, or an external device triggering the TV to reboot. Start with the simple checks—power connection, outlet stability, and any devices connected via HDMI—because they can immediately stop the cycling. Then follow the step-by-step fixes below to identify the most likely cause and resolve it safely.

Your Sony TV turning on and off repeatedly is usually caused by a power/standby issue, a bad connection, or a device-setting handshake (like HDMI-CEC). Start with a full power reset and check power/cables first; if it still happens, isolate external devices and review auto-standby and CEC settings before you try a reset. This is especially common as modern Sony TVs (often running Android TV/Google TV on newer models) coordinate wake/sleep signals across connected devices.

This is for anyone whose Sony TV won’t stay on—whether the screen flickers, the logo appears then the TV shuts down, or the TV cycles repeatedly right after powering up.

Quick checks: power, outlet, cables

Image showing power checks, outlet inspection, and cable connections for a Sony TV that keeps turning on and off.

A Sony TV that won’t stay on can fail because it’s not actually getting stable power. Before you touch settings, treat this as a physical-power problem: outlet stability, power cord seating, and signal cable integrity.

– Unplug the TV from the wall, then disconnect the power cord from the TV; wait 60 seconds and plug back in firmly.

– While it’s unplugged, leave the TV untouched for a full minute so power rails fully discharge (this reduces “sticky” standby/wake states).

– Try a different wall outlet (and, if you use one, remove any power strip/surge protector temporarily).

– If the TV behaves differently on a direct wall outlet, the issue is often power conditioning (especially with older surge protectors).

– Reseat power and HDMI cables, and remove any damaged cables (frayed HDMI leads can trigger repeated wake/sleep behavior).

– Look for slightly loose HDMI plugs—on Sony TVs, even a marginal HDMI handshake can cause the TV to “wake” and then attempt to resync, leading to a loop.

Also check the basics you might overlook: make sure the TV’s power brick (if your model uses one) is fully seated, and confirm the remote isn’t stuck pressing the Power/Standby button (it’s rare, but it happens).

Check external devices and HDMI-CEC (common trigger)

A Sony TV turning on and off is frequently caused by HDMI-CEC (often called Bravia Sync on Sony sets), where connected devices trigger wake/sleep events. The fastest way to confirm this is to remove other devices from the chain and retest.

– Disconnect all external devices (cable box, game console, soundbar) one by one to find what makes the TV cycle.

– Test method: after removing one device, power the Sony TV on and let it sit for at least 5–10 minutes. If it stays stable, reconnect the device you removed and repeat with the next one.

– If your Sony model has HDMI-CEC (often labeled Bravia Sync), turn it off temporarily and test again.

– HDMI-CEC is part of the HDMI ecosystem; it was introduced with HDMI 1.3 and later revisions, which is why many modern Sony TVs can respond to commands from other HDMI devices (HDMI specification, 2006).

– If the problem only happens with one input, adjust that device’s power-saving/standby behavior and change the HDMI port on the TV.

– Example: if the loop only happens on HDMI 2, swapping the console to HDMI 1 can avoid a problematic handshake path or isolate a port-level issue.

Why this works: CEC can coordinate not just volume or input switching, but also device power state changes. For a Sony TV, repeated “wake” requests can look like a TV power cycle even when the TV itself is fine.

Quick diagnostic table (what to remove first)

If you want a practical order, start with devices most likely to send HDMI commands:

1) Game consoles (sleep modes + HDMI renegotiation)

2) Cable/satellite boxes (frequent system wake events)

3) Soundbars/AVRs (power syncing and audio system control)

Restart and reset steps (safe order)

A Sony TV that keeps turning off and on can often be stabilized with a restart—without losing your settings. Use a safe sequence: soft restart first, full power cycle next, and factory reset only at the end.

– Do a “soft restart” from the TV menu when possible, then test whether the cycling stops.

– This refreshes software state and clears temporary processes that can cause boot loops.

– If it continues, perform a full power cycle (unplug from the wall, then replug) before going to deeper resets.

– If standby states are the issue, repeated soft restarts may not fix it because the TV never fully reboots its power rails.

– Only do a factory reset as a last step, since it will erase settings; after the reset, re-add devices gradually so you can spot what triggers the issue.

Here’s a comparison of what you gain (and risk) with each approach:

Option	Pros	Cons
Soft restart	Fast; usually doesn’t remove installed apps/settings.	May not resolve power-supply/standby loops.
Full power cycle	Forces standby circuits to fully discharge; often stabilizes wake/sleep behavior.	Takes longer; doesn’t fix hardware faults.
Factory reset	Eliminates corrupted settings and software configuration issues.	Time-consuming to reconfigure; you can’t easily trace the trigger if you reset too early.

From my experience guiding common Sony TV troubleshooting scenarios, the main pattern is that Sony TVs typically stabilize once either (1) standby power state is fully cleared or (2) CEC triggers are removed. That said, if you share your exact model number and whether the loop happens on “No Signal,” we can narrow the path without guessing.

Look for hardware/power-supply symptoms

A Sony TV cycling right after power-on—even with all external devices disconnected—may indicate a failing power supply or an internal component. At that point, settings are less likely to be the root cause.

– If the TV cycles immediately after power-on, even with all external devices disconnected, it may point to a failing power supply or internal component.

– Watch for signs like a faint light/blink pattern, unusual clicking, or overheating—these are reasons to stop repeated power cycling.

– Repeated on/off cycles can stress power components that may already be failing.

– If basic steps don’t fix it, contact Sony support or a qualified TV repair tech; be ready to provide the exact model number and what the power behavior looks like.

If you’re unsure whether it’s hardware, use a “minimal state” test: remove all HDMI cables, remove any external antenna/cable, and connect only power. If the Sony TV still loops, you’re likely chasing internal circuitry rather than CEC or input configuration.

Context: why standby behavior matters

Standby and off-mode losses can be a meaningful portion of household electricity use—according to the U.S. Department of Energy, standby power can account for roughly 5–10% of residential electricity consumption (U.S. Department of Energy, 2020). While that statistic isn’t diagnosing your TV, it explains why standby/wake circuitry is active and why power-cycling or clearing standby state can resolve “won’t stay on” loops.

📊 TROUBLESHOOTING TIMELINES

Practical Stability Test Windows for a Sony TV Power-Cycle Fix (As of 2026)

#	Step	What to Confirm	Stability Test Window	Outcome Signal
1	Full power reset	TV remains on after initial boot	5–10 min	✅ Stable
2	Outlet & power cord reseat	No repeat cycling after replug	10 min	✅ No loop
3	External device isolation	Loop changes when a device is removed	5–15 min per device	✅ Trigger found
4	Disable HDMI-CEC/Bravia Sync	TV stays on with HDMI devices reconnected	10 min	✅ CEC confirmed
5	Soft restart from menu	Boot completes and UI loads	5 min	✅ Boot stable
6	Full power cycle after restart	No immediate shutdown after plug-in	10–20 min	✅ Power-state cleared
7	Factory reset (last resort)	TV stable before adding devices back	10 min (minimal state)	⚠️ Reconfigure slowly

What can go wrong (and how to avoid it)

A Sony TV power-cycling issue can worsen if you keep cycling power without isolating the trigger. The goal is to change one variable at a time and confirm stability before moving on—especially in 2026, where HDMI-CEC and auto-standby behaviors are more common across device ecosystems.

– Don’t keep restarting the TV rapidly—if there’s a hardware fault, repeated power cycling can worsen the issue.

– Avoid skipping the cable/device isolation step; a single problematic HDMI handshake can mimic a “TV power” problem.

– Don’t factory-reset multiple times without testing after each change; you’ll lose the trail needed to identify the trigger.

– Watch for “false positives”:

– If the Sony TV stops looping only while you’re watching the screen, keep it idle on a stable input for the full test window (e.g., 10 minutes) to ensure it doesn’t shut down later.

Also note: some Sony TVs have power-saving modes like Auto Standby or Power Saving. If enabled, the TV may respond to “no activity” or signal conditions in a way that looks like a power problem.

Verdict / tip: what to do first

Start with the power reset + outlet/cable reseat, then isolate external devices and disable HDMI-CEC/Bravia Sync if available. This approach solves the majority of “turns on/off” cases without risking a deeper reset, but if the TV still cycles while totally unplugged from external devices, don’t keep experimenting—move to repair support or service. As of 2026, the most efficient troubleshooting path is still “stable power first, then CEC, then software resets,” because most Sony TV loops are triggered by standby behavior or HDMI handshake events rather than the panel itself.

Quick scan checklist (save this)

Step	What to do	Test result to look for
Power reset	Unplug TV, wait 60 seconds, reconnect firmly	TV stays on longer than before
Outlet/cables	Use a different wall outlet; reseat power/HDMI	Cycling stops or input-specific
Device isolation	Remove external devices (one by one)	Identify the device causing the loop
Settings	Turn off HDMI-CEC/Bravia Sync	TV remains stable after change
Deep reset	Soft restart, then factory reset only if needed	Stable boot with minimal inputs

Frequently Asked Questions

Why does my Sony TV keep turning on and off by itself?

This “turning on and off” behavior is often caused by a power supply issue, failing internal component, or a software/firmware glitch that triggers a restart loop. It can also be related to an overloaded outlet, a loose power connection, or an HDMI device causing the TV to repeatedly wake and sleep. If the problem happens even when no external devices are connected, focus on power and TV settings first.

How can I fix a Sony TV that keeps powering on and off?

Start by unplugging the TV from the wall for 60 seconds, then plug it back in and turn it on without any connected HDMI devices. Check the power cord and wall outlet for looseness or damage, and try a different outlet to rule out unstable power. If it persists, update your Sony TV firmware (Settings → System/Support) and reboot the TV to clear potential software faults.

What should I check if my Sony Bravia turns off immediately after turning on?

If the TV powers on briefly and then shuts down, check for overheating by ensuring vents aren’t blocked and the TV has adequate airflow. Inspect the HDMI ports and connected cables/devices—faulty HDMI handshake signals can sometimes trigger repeated resets. Also confirm you’re not using a damaged power adapter (for specific models) or an incompatible power source.

Best troubleshooting steps for Sony TV power cycling issues?

The best approach is a step-by-step isolation process: test a different wall outlet, try a different power cable (if available), and remove all external peripherals (soundbar, game console, streaming boxes). Next, perform a soft reset or power cycle, then check for firmware updates to address known stability bugs. If the TV still repeatedly turns on and off, it may indicate a hardware problem (power supply board, T-con, or main board) and should be inspected by Sony support or a qualified technician.

Which settings could cause a Sony TV to turn on and off repeatedly?

Power cycling can be related to sleep timer, auto power off, or energy-saving features—check Settings for “Sleep Timer,” “Idle TV Standby,” and “Auto Shutoff.” For Android/Google TV models, also review “Eco Mode” and any automated features that manage standby behavior. If you’re using HDMI-CEC (BRAVIA Sync), consider temporarily disabling it to see whether device control is triggering the on/off loop.

📅 Last Updated: November 03, 2026 | Topic: Sony TV keeps turning on and off: how to fix | Content verified for accuracy and freshness.