Samsung The Frame LS03 (LS03B / LS03C / LS03D): quick sheet

Covers: Samsung The Frame lifestyle TVs with matte screen and One Connect box: LS03B (2022), LS03C (2023), LS03D (2024), e.g. QN43LS03DAFXZA, QN55LS03DAFXZA, QN65LS03DAFXZA, QN75LS03DAFXZA. Sizes 32 in (Full HD) and 43-85 in (4K). 43 and 50 in are 60 Hz; 55 in and up are 120 Hz.

Cross-checkedBrands: Samsung7 components

An edge-lit quantum-dot LCD built to hang flush like a picture, with a separate One Connect box that holds the inputs and links to the screen through one thin cable. Art Mode keeps the screen lit at low brightness for hours each day, and a motion sensor turns it on and off. Many 'dead TV' calls are actually the One Connect cable, the box, or Art Mode settings.

Safety first

Unplug the box before reseating cables.
Opening the screen exposes LED-driver voltages: caution work.
Two people to lift the screen off its flush mount.

How it works

All sources plug into the One Connect box (HDMI, USB, antenna, optical, Ethernet). One thin cable runs from the box to the screen; Samsung lists a single 'Invisible Connection' on 43-85 in and a grey One Connection on 32 in.

The screen uses edge LEDs with no real local dimming (RTINGS); blacks look gray in a dark room. That is normal for this design.

Art Mode shows artwork at low brightness when the TV is 'off'; the motion sensor wakes and sleeps it. A screen that lights by itself or stays on is usually Art Mode or sensor settings, not a fault.

Components & tests

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Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.

Diagnostic guides for this appliance

Guide · TV

Soundbar won't turn on with the TV, or TV remote won't control its volume (HDMI-CEC)

One-remote control depends on HDMI-CEC over the ARC/eARC cable. Disabled CEC, the wrong HDMI port, an optical connection, a poor cable or a TV update that switched settings off cause nearly all of these calls.

7 steps ~30 mineasy

Guide · TV

Soundbar audio cuts out, pops or drops with movies/Atmos (ARC/eARC)

Dropouts usually come from an unstable ARC/eARC handshake or a format the chain doesn't handle well. Work through cable, firmware, CEC conflicts and the TV's digital audio format; optical is a stable fallback without Atmos.

8 steps ~40 mineasy

Guide · TV

Projector won't turn on or shuts off (reading the indicator lights)

Projectors protect themselves: overheating, lamp at end of life, and lamp-cover interlocks all stop the light source. Read the indicators against the model's table, then fix airflow, lamp seating or lamp life.

6 steps ~30 mineasy

Other tvs manuals

Manual · TV

Samsung Crystal UHD CU8000 / DU7200 / DU8000 (2023-2024): quick sheet

Samsung Crystal UHD 4K LED sets one step above the CU7000: CU8000 (2023, e.g. UN55CU8000FXZA, UN65CU8000FXZA; 43-85 in), DU7200 (2024 retail-channel model, e.g. UN65DU7200) and DU8000 (2024, e.g. UN65DU8000FXZA). Year letter: C = 2023, D = 2024. The 85-inch CU8000 and DU8000 use a different 120 Hz panel with HDMI 2.1 features; do not treat them like the smaller sizes. The basic TU7000/CU7000 have their own sheet.

7 components6 common failuresSamsung

Manual · TV

Samsung Neo QLED QN85 / QN90 Mini-LED (B / C / D, 2022-2024): quick sheet

Samsung Neo QLED 4K mini-LED sets: QN90B/QN90C/QN90D and QN85B/QN85C/QN85D, e.g. QN65QN90CAFXZA, QN65QN90DAFXZA, QN55QN85DBFXZA. Year letter: B = 2022, C = 2023, D = 2024. QN90C sizes 43-85 in; QN90D 43-98 in; QN85C 43-85 in; QN85D 55-85 in. QN90DD / QN90CD are retailer variants of the same series (check the exact suffix before ordering parts).

7 components6 common failuresSamsung

Manual · TV

Samsung OLED S90C / S90D (2023-2024): quick sheet

Samsung 4K OLED S90C (2023, e.g. QN65S90CAFXZA) and S90D (2024, e.g. QN65S90DAFXZA; 42, 48, 55, 65, 77, 83 in). Panel source varies: the 83 in S90C and the 42/48/83 in S90D are reported to use LG Display WOLED; 55/65/77 in S90D may use either Samsung QD-OLED or LG WOLED ('panel lottery').

7 components5 common failuresSamsung