DELL Technologies

Original Discussion: Inspiron 7559, LCD failure, 2 amber, 7 white blinking LED What Does This Code Mean? The LED pattern 2 amber, 7 white indicates an LCD failure. This diagnostic code is common across multiple Dell laptop families (Inspiron, Latitude, XPS, etc.). It usually points to: A defective LCD panel A loose or damaged LCD (eDP) cable In rare cases, a system board display circuit issue Instructions for Resolution A. Quick Checks Hard Reset Disconnect AC adapter and all external devices. Hold the Power button for 15–20 seconds to drain residual power. Reconnect and try powering on. Visual Inspection Check the screen for cracks, discoloration, or visible damage. If damaged, the LCD panel will need replacement. B. Isolate the Fault Run LCD Built-In Self-Test (BIST) With the system off, hold D and press the Power button. The screen should cycle through colors (white, red, green, blue, black). If BIST passes (colors show): The panel works; suspect cable or board. If BIST fails (no colors): Likely panel or cable issue. Test with an External Monitor Connect an external display via HDMI/DisplayPort. Use Fn + F8 (or your model’s display toggle key). External works: GPU/system board is fine → focus on LCD or cable. External fails: Possible system board issue. C. Software Steps Update Graphics Drivers If the LCD still works intermittently, update Intel/NVIDIA/AMD drivers from Dell Support. This can resolve false-positive error codes. D. Hardware Steps Important: Disconnect AC and battery before opening the system. Follow your model’s Service Manual. Reseat the LCD Cable Disconnect and reconnect the LCD (eDP) cable at both ends (panel and motherboard). Inspect the hinge area for pinched or damaged cables. Replace Components in Order Step 1: LCD cable (common failure point). Step 2: LCD panel. Step 3: System board (only if external display also fails). If you found this post helpful, please click 'Like' to let us know. Your feedback is appreciated.

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