Troubleshooting
Posts filed under the tag “Troubleshooting”.
Articles in this section cover Troubleshooting from a practical TFT display integration point of view, with attention to product design, module selection, and real-world engineering trade-offs.
AVDD, VGH, VGL, VCOM: TFT LCD Power Rails Explained
Understand TFT LCD AVDD, VGH, VGL, and VCOM rails, how they differ from logic and backlight power, and how to measure bias faults without guessing voltages.
TFT LCD Power-On and Power-Off Sequencing Guide
Plan TFT LCD power sequencing with checks for logic rails, reset, initialization, image data, backlight enable, shutdown, brownouts, and fast restarts.
MIPI DSI Display Not Working: A Debug Checklist
Debug a black or white MIPI DSI display by checking power, reset, LP commands, D-PHY clocks, lanes, video mode, packet timing, errors, and panel init.
Screen Tearing on TFT Displays: Causes and Fixes
Stop TFT screen tearing by synchronizing framebuffer updates, DMA transfers, page flips, SPI flushes, VSYNC, and TE signals. Includes tests and design fixes.
Wrong or Inverted Colors on a TFT Display
Fix wrong, swapped, inverted, or washed-out TFT display colors by checking RGB/BGR order, pixel format, byte order, bus mapping, polarity, gamma, and software.
Vertical Lines, Horizontal Lines, and Artifacts on TFT LCDs
Diagnose TFT LCD lines, noise, shifted images, and artifacts by testing patterns, timing, interfaces, FPCs, power, EMI, and panel behavior.
LCD Has an Image but No Backlight: What to Check
Diagnose an LCD that shows a faint image but has no backlight. Check LED strings, boost voltage, current driver, enable, PWM, faults, FPC, and thermal issues.
TFT LCD White Screen: Causes and Step-by-Step Troubleshooting
Fix a TFT LCD white screen with a systematic checklist covering backlight, power rails, reset, initialization, interface timing, FPC, and panel faults.