Hey! We’ll fix your TCL not saving settings problem fast. When a TCL TV keeps reverting settings (picture mode, brightness/backlight, Wi-Fi, sound, inputs, or apps signing out), it’s usually one of these causes:

1) Store Mode / Demo (Retail) Mode — designed to reset settings automatically.
2) TV OS mode limits (Google TV “Basic mode”, profiles, permissions) that can make changes “not stick.”
3) Software glitch or corrupted cache after updates, power loss, or app crashes.
4) External device overrides (HDMI-CEC, soundbar, set-top box) forcing audio/input changes.

Quick questions so we pick the shortest path:
• Which TCL platform: Roku TV, Google TV, Android TV, or Fire TV?
• What exactly won’t save: picture settings (brightness, contrast, color temp, motion smoothing), sound, Wi-Fi, inputs, or apps/accounts?
• When does it reset: after turning TV off, after switching inputs, or randomly during use?
• Any recent change: firmware update, power outage, new HDMI device, enabled “Quick Start/Fast Start,” or moved the TV?

Reply with those and I’ll give you a clean complete fix guide.

Got it — on TCL Roku TV, that combo (picture settings reverting + Wi-Fi not sticking + apps signing out) strongly points to either:

• Store/Display Mode (it intentionally resets settings), or
• a system/caching issue after updates or unstable power (settings don’t write correctly to storage), or
• the TV is doing a “pseudo factory refresh” behavior when it boots due to OS glitches.

We’ll troubleshoot in the fastest order: confirm Home mode → do a proper power cycle → update Roku OS → isolate Wi-Fi/account issues. Only then we consider a factory reset (last step).

Perfect — here’s the fastest “high-impact” check.

Step 1 — Confirm the TV is in Home Use (not Store/Display/Demo mode)
On most TCL Roku TVs, Store/Display mode can make picture settings not save by design. If you can’t find a toggle, don’t worry — I’ll show you the clean fix in Step 4.

Step 2 — Do a true power cycle (not just remote Off)
1) Unplug the TV from the wall for 60 seconds (this clears stuck memory/cache).
2) While unplugged, press and hold the TV’s power button (on the TV) for 10 seconds if available.
3) Plug back in, turn on, then change one picture setting (like brightness) and see if it persists after a restart.

If it still reverts, we’ll move to the two biggest “real fixes”: system update + proper Home mode setup.

Great detail — HDMI-CEC/ARC can cause audio/input changes, but it usually won’t wipe picture settings. Your case still sounds like mode + software stability.

Step 3 — Update the TV OS (Roku OS) + reboot correctly
1) Go to Settings > System > System update → Check now.
2) After any update, do Settings > System > Power > System restart (this is better than just turning it off).

Quick CEC sanity test (optional, but helps rule out “forced changes”)
Temporarily disable CEC for testing:
Settings > System > Control other devices (CEC) → turn off, then test overnight once. If only audio stops changing but picture still resets, we know CEC isn’t the root cause.

Next is the most common “why TCL Roku TV won’t save settings” fix: force the TV back to Home Use with a clean setup.

Totally normal — on many TCL Roku models, the reliable way to exit Store/Display mode is a factory reset and choosing Home Use during the initial setup. I know that sounds “big,” but it’s the cleanest fix when TCL TV settings won’t save.

Step 4 — Fix TCL Roku TV Store Mode (the “settings keep resetting” culprit)
1) Go to Settings > System > Advanced system settings > Factory reset.
2) Choose Factory reset everything and follow the prompts.
3) During setup, when asked about usage, pick Home Use (NOT Store/Display).

Before you do it: take a photo of your Wi-Fi name/password and any app logins you’ll need. This reset often fixes:
• picture settings not saving (brightness/backlight, color temperature, motion smoothing)
• Wi-Fi credentials not saving
• apps repeatedly logging out

If you’d rather try one more non-reset step first, we can — but in practice, Step 4 is the fastest “complete fix guide” move for this symptom set.

Smart question. Here’s the logic without guessing:

Why multiple settings revert (picture + Wi-Fi + apps)
• Store/Demo mode can reset user preferences to keep the TV “showroom ready.” That’s the #1 reason picture settings won’t stick.
• If it’s not Store Mode, the next most common reason is software cache corruption after updates or sudden power loss — the TV fails to “write” settings consistently until you clear it via reset.

When to suspect hardware/storage issues
If after a factory reset in Home Use the TV still forgets Wi-Fi and picture settings within hours, that can point to deeper OS issues or failing storage. But we don’t jump there — we test the clean baseline first, because most units recover fully after a proper reset + correct mode.

If you want an extra “safety” step before resetting: plug the TV into a stable outlet/power strip (not a flaky extension), because unstable power can trigger corrupted saves.

Nice — that confirms the core issue was mode/setup, not “broken TV.” What you’re seeing now is usually input-specific picture settings (very common on TCL/Roku TVs): each HDMI input can have its own picture preset, and external devices can trigger Auto Low Latency Mode (ALLM) / “Game Mode.”

Step 5 — Lock your picture settings per input (prevents “it changed again”)
1) Switch to the HDMI input that keeps changing (e.g., HDMI 1 for console).
2) Set your desired options: Picture Mode, brightness/backlight, local contrast, motion smoothing/action smoothing, noise reduction, color temp.
3) Repeat for each input you actually use (HDMI 1/2/3, Live TV, streaming apps).

Step 6 — Stop automatic Game Mode switches (if you don’t want them)
If your console/PC triggers it, look for a setting like Auto Game Mode / ALLM on the TV or the console and disable it for testing. Some people prefer keeping it ON (lower latency), but it can change motion processing.

This is different from the original “not saving settings” issue — it’s more about per-input behavior.

Yes — here’s the “reset ladder” so you don’t wipe things unnecessarily.

First response checklist (fast)
• Do a true power cycle (unplug 60 seconds).
• Run System restart (Roku): Settings > System > Power > System restart.
• Check System update (Roku OS).
• Confirm you’re still in Home Use (not Store/Display).
• If changes happen only on HDMI, treat it as input-specific settings or ALLM/Game Mode switching.

Next step (only if needed)
• Factory reset + choose Home Use again (fixes mode corruption and stubborn cache issues).

When to suspect deeper issues
• If the TV forgets Wi-Fi and settings even right after a reset and stable power — then we’d look at warranty/service.

If you tell me your exact TCL model (and whether it’s Roku TV vs Google TV), I can give you the most “known good” settings path for that platform.

Love to hear it. Summary: when a TCL TV won’t save settings, the fastest win is confirming it’s not in Store/Demo mode. On many TCL Roku/Google TV models, a clean reset and choosing Home Use stops picture settings from resetting and stabilizes Wi-Fi + app sign-ins.

If anything starts reverting again (picture mode, sound settings, Wi-Fi, accounts), open the chat — we can diagnose whether it’s mode, software, or an external HDMI/CEC trigger and fix it step-by-step.