Sony BRAVIA 3 (S30, 2024): quick sheet

Covers: Sony BRAVIA 3 entry 4K Google TVs: K-43S30, K-50S30, K-55S30, K-65S30, K-75S30, K-85S30 (2024). Panel type can differ by size (the 43 in tested as IPS-type by Tom's Guide).

Cross-checkedBrands: Sony7 components

Sony's most affordable 2024 set: direct-lit LED backlight with no local dimming, 60 Hz panel, four HDMI 2.0 inputs (no HDMI 2.1), X1 processor and Google TV. RTINGS notes that one failed LED can black out the whole backlight, so 'sound but no picture' is the classic call.

Safety first

Unplug and wait before opening.
LED-driver and power-board live tests are caution work.
Two-person panel handling.

How it works

Power board supplies standby, logic and LED string voltage; the main board (Google TV, X1) feeds the panel electronics.

LEDs are wired in series strings on strips behind the diffuser; one open LED stops the string, and the LED driver may shut down the whole backlight.

No HDMI 2.1 and a 60 Hz panel: consoles cannot run 4K 120. That is the design, 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.Generic part photos (not of this brand): Main electrical panel beside a subpanel with its cover removed by Gvolk, CC BY-SA 3.0

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

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.

7 components6 common failuresSamsung