Settings that reset themselves = store mode
Floor-model TVs (and the occasional brand-new one) ship in retail demo mode: promo banners appear, brightness is locked at showroom-torch levels, and — the classic symptom — every picture setting you change quietly reverts minutes or hours later. If you bought an open-box or floor-model TV in Bakersfield and it keeps undoing your changes, this is why. The fix is a hidden mode switch, different on every brand.
Samsung — Usage Mode
Settings → General & Privacy → System Manager → Usage Mode → enter the PIN (factory default 0000) → select Home. You may see it during a banner too — but the menu path works every time.
LG — Home/Store Mode
Recent models: Settings → All Settings → General → Devices → TV Management → Home/Store Mode → Home. On older webOS it sits under General → Additional Settings. Store mode also overrides energy-saving settings — another reason it must go.
TCL and other Roku TVs — the hard truth
TCL’s own documented fix is a factory reset: Home → Settings → System → Advanced System Settings → Factory Reset, then during setup choose “Home Use” — the store/home question is asked exactly once, at setup.
Vizio — Store Demo
Menu → System → Reset & Admin → Store Demo → Disabled. When a demo splash is actually on screen, Exit/Back usually offers “Exit Demo” directly.
Hisense
Google TV models: Settings → Device Preferences → Retail Mode off (some years put a Store Mode toggle under System → Advanced). Roku-based Hisense sets follow the TCL factory-reset route.
Worth it? Sometimes — with two checks
Floor-model discounts are real money, but the set has run 12 hours a day at maximum brightness for months. Two honest checks before handing over cash: put on a solid dark scene and look for uneven backlight blotches, and confirm the store will let you switch it to Home mode before it leaves the building — if the demo PIN has been changed from default and nobody knows it, that TV may need a factory reset you want them to do, not you.
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More guides: Turn off motion smoothing · Fix a Vizio TV · Our TV mounting service
Quick answers
My brand-new TV shows a demo banner — did I get a used one?
Not necessarily — a mis-tap during first-time setup picks store mode, and some open-box units were display stock. Switch it to Home mode; if picture settings then stick, all is well.
Samsung asks for a PIN I don't know.
Try 0000 first — it is the factory default. A floor model may carry a store-set PIN; the nuclear option is a factory reset from the service menu, which is a good moment to call us instead of guessing.
Will a factory reset erase my apps and logins?
Yes — Wi-Fi, apps and sign-ins all go. It takes 15–20 minutes to rebuild, and on Roku TVs it is unavoidable: that is the manufacturer’s own store-mode fix.
The TV is out of demo mode but still blindingly bright.
Store mode locked a vivid picture preset; leaving the mode doesn't always change the preset. Switch to Standard, Movie or Filmmaker mode and the retina relief is immediate.