Phone screen problems
White spots, black spots, lines, green tint and dead touch zones on a phone screen — what each one is, whether it can be fixed, and what a display costs.
White screen⛶ Full screen
On whitedark spots, pressure marks, lines
On blackbright dots, backlight bleed, glow
On red, green, bluedead or stuck pixels, colour lines
White spot on phone screenA white spot on a phone screen that shows on dark backgrounds is a pressure point on the display: the phone was pressed hard in a pocket, sat on, or dropped, and the layers of the LCD or the OLED's backing have been pushed together at that point.Not fixable — new panelWhy is my phone screen green?A green tint over the whole phone screen — or a screen that goes fully green — has two very different causes.Depends — see testLines on phone screenVertical or horizontal lines on a phone screen are almost always the panel or its connector, not software.Not fixable — new panelBlack spot on mobile screenA black spot, patch or blot on a mobile screen that is there on every colour is damage inside the display: crushed pixels from pressure, or an internal crack in the panel with the glass intact.Not fixable — new panelBlack dot on phone screenA single small black dot on a phone screen is one of three things: a dead pixel (a sharp black point on every colour), a speck of dust under the screen protector or the glass (raised, and it moves with the protector), or the start of pressure damage (soft-edged, grows over time).Depends — see testTouch screen testA touch screen test checks whether every part of the screen registers your finger.Fixable
Warranty: dead pixel policy by brand.
Not sure which one you have? Open the full-screen test, step through white, black and grey, and match what you see: a mark on every colour is in the panel; a mark only on light colours is a shadow on the backlight; a bright spot only on dark colours is a loose backlight reflector; lines that change when you tilt the lid are the cable.