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Nie, dziękuję Przekieruj mnie tamsony 49xf7096 strisce verticali sullo schermo senza immagine, manca l audio
• Simultaneous vertical stripes, total loss of picture and audio on a Sony KD-49XF7096 almost always point to a main-board (motherboard) fault; second-level suspects are the power-supply (PSU) that feeds the main board or, more rarely, the T-CON board.
• Start with a complete power reset and cable check; if symptoms persist, open the set and verify voltages from the PSU to the main board, reseat all LVDS/ribbon cables, and look for physical damage.
• In >80 % of repairs with these symptoms the cure is to replace the main board with an identical part number. If PSU rails are missing or unstable, replace the PSU first.
• If the set is still under warranty, contact an authorised Sony service centre; otherwise follow the structured diagnostic procedure below.
Symptom correlation
• Vertical stripes / garbage screen ⇒ LCD panel and back-light are powered but receive no valid video data.
• No audio ⇒ Audio DSP on the main board is not running or is not being powered.
• Both together ⇒ The common denominator is the main board (system-on-chip + audio codec + LVDS output) or the rails that power it.
Functional block review
• Power-Supply Unit (PSU) generates STBY 3 – 3.3 V, 12 V, 24 V.
• Main Board boots from SPI-NOR/NAND flash, runs Linux/Android, decodes A/V, outputs LVDS/eDP to the T-CON and I²S/PWM to the audio amp.
• T-CON time-stretches LVDS/eDP into hundreds of column/row drive lines for the panel.
• LCD panel merely converts those drive signals into an image; it does not generate audio.
Probability matrix (derived from in-field repair statistics for X7-series)
Main board (SoC/BGA, corrupted firmware, failed buck converter) ≈ 65 %
PSU (dropped 12 V or STBY rail, cold joint on PFC) ≈ 20 %
T-CON or LVDS cable ≈ 10 %
Panel damage ≈ 5 %
Typical main-board failure modes
• Overheating → BGA solder-ball fatigue under the MT5891 (MediaTek) SoC.
• Flash corruption → boot loop, no video/audio.
• Local LDO or buck regulator short → board does not start, PSU rails sag.
Why the T-CON is unlikely alone
If only the T-CON fails you lose picture but audio remains because the main board continues to decode and output sound. Your set has lost both; therefore look upstream.
• Sony no longer lists replacement boards for 2018-2019 XF models; stock is mostly in the aftermarket (eBay, Encompass, ASWO).
• Professional repair labs increasingly re-flow or re-ball the MediaTek SoC; success rate ≈ 50 %. Board swap is faster and more reliable for field service.
• PSU failures on XF7096 are often due to EPCOS 450 V electrolytics drying out; modern low-ESR replacements improve longevity.
• LED blink codes: KD-49XF7096 uses red blink diagnostics. Continuous 6-blink → back-light inverter; 7-blink → main board/T-CON communication; 0 blinks but panel lights up with stripes typically means the firmware never booted.
• Voltage map (refer to silkscreen at CN6400, PSU → MB):
STBY 3.3 V (always present), 12 V_Main (after PWR-ON), BL-ON (3.3 V logic). Lack of 12 V while STBY is present → PSU secondary fault; correct 12 V but board dead → main board.
• Quick T-CON isolation test: disconnect the LVDS ribbon at the main board; TV should still boot (Android chime via speakers) if the main board is alive. Total silence confirms main-board crash.
• Opening the set voids any remaining warranty and exposes you to mains potentials.
• Use only RoHS-compliant, CE-marked replacement parts.
• Data privacy: Android TVs store user credentials; replacing the main board destroys that data but the old board should still be wiped or destroyed.
Potential challenges & mitigations
• Board scarcity → consider professional BGA re-flow as interim fix.
• Firmware mismatch → verify new board is same region (EU). If not, update via USB before sealing the back cover.
• A cracked panel or COF (Chip-on-Film) failure can mimic stripes; however this usually leaves audio intact.
• Power-supply probing involves lethal voltages; proceed only if trained.
• Some third-party boards are sold “naked” (no MAC-address label); this disables Google/Gemini DRM and some streaming apps.
• Download the full service manual for the KD-49XF7596 (same chassis) – includes schematics used for voltage checks.
• Study BGA-reflow reliability papers (e.g., IPC-7095C) if you attempt to revive the original board.
• Monitor Sony service bulletins; in some regions a “no A/V, stripes” bulletin extended warranty on XG/XF main boards.
The concurrent loss of picture and audio together with vertical stripes on a Sony KD-49XF7096 almost always originates on the main board. After ruling out simple firmware or cabling issues with a power reset and connector check, measure PSU outputs; if correct, replace the main board (or have it professionally re-flowed/repaired). The T-CON and panel are secondary suspects but rarely cause audio loss. Follow safe-working practices, respect warranty terms, and source an exact part-number match for the replacement board.
