In short
If your LG OLED stays black — dark screen, no picture — it is usually a start or power issue, not a cosmetic panel quirk.
People also search no picture and PSU or panel. Both happen. Often the cause is the power supply (PSU, Power Supply Unit / power board) or start chain — not automatically the OLED panel.
What “stays black” means
You power on, but no image appears. Standby LED may be on, off, or blinking; you may hear a relay click or silence.
Related: won't turn on, red LED blinking, standby LED off, clicks twice.
- Black screen after power-on attempt
- No menu, logo, or backlight glow
- Optional: standby LED behaviour
- Optional: click then dead again
PSU or panel — rough triage
PSU / power: set feels dead or starts then drops; blink codes; click without picture. Aging PSU parts are common on LG OLED.
Panel: more often artefacts *while powered* — lines, partial image, dead pixels.
Mainboard: can block start/video path; see mainboard or PSU.
Safety
Mains voltage is lethal. Open chassis and PSU carry dangerous voltages. Discharge electrolytics before measuring. Never work live.
Unsure? Unplug, do not open. AmparioWeb offers tested parts and fixed-price repair.
Checks without voltage
Triage only:
- Other cable / outlet
- Document LED and click (video)
- Note model and board number (often EAY…) — find number
- Unplug HDMI sources
When AmparioWeb helps
Black screen with suspected power/start issues: map PSU / mainboard before panel replacement talk.
Next: repair, parts, find number.
Frequently asked questions
- Is a black screen always a dead panel?
- No. Many no-picture cases are PSU or start-chain related.
- Same as “won't turn on”?
- Often yes — different search phrase. See won't turn on.
- Does unplugging help?
- Sometimes briefly. If it returns, hardware (often PSU) is likely.
- Which part first?
- No blind buy. Map via find number, then parts or repair.
- Can AmparioWeb help?
- Yes — model, symptom video, history. Support or repair.
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Power boards for LG OLED — tested under load, 12-month warranty.
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