Teletext-Tools 761 — Black Screen

PURE BLACK FULLSCREEN

P761

Press START for a totally black screen. No text. No UI.

Exit: press ESC (or tap/click screen).

CONTROLS

761

START BLACK SCREEN

START shows pure black inside the screen.
FULLSCREEN attempts true fullscreen black.
Tip: set brightness to taste.

STATUS

READY

ESC exits fullscreen (browser) and returns to tool.
Tap the black screen to exit quickly.
Use: OLED rest, focus, dead pixel checks.

Quick jump: 760 Screen Testing (index) • 762 White Screen • 767 Dead Pixel Test

1) Press START (pure black appears)

2) Optional: press FULLSCREEN first

3) Exit: ESC or tap/click black screen

OLED rest: dark screen while keeping device on

Focus: remove visual distraction

Testing: check glow, backlight bleed, dust

iPhone/iPad: fullscreen rules vary by browser.

If fullscreen is blocked, START still gives a pure black screen.

Safety: don’t use while driving.

Is it really black? yes — the overlay is #000.

Why do I see glow? LCD backlight / IPS glow.

OLED “black crush”? very dark detail may vanish.

Can this find dead pixels? pair with 762–765 colour screens.

Fullscreen button does nothing? browser policy.

Try again after a direct tap, or use START only.

Exit: ESC (desktop) or tap (mobile).

Good: black pixels are “off” on OLED.

Still: avoid leaving any screen on for hours unattended.

Black screen testing helps reveal backlight bleed, glow, and dust.

Pair it with solid colours to spot stuck pixels quickly.

For calm focus, keep brightness low and exit with ESC.

762 White Screen • 763 Red • 764 Green • 765 Blue

767 Dead Pixel Test • 769 Banding Test

black screen • fullscreen black • screen test

oled black • backlight bleed test • IPS glow