How to fix a Dell E156FPc with no display?
- JJohn JamesAug 1, 2025
If your Dell Monitor has no display, try the following: * Check the main board power for DC level. * Measure CN701 pin 5/6 for 12V output and check U701 pin 2 for 3.3V, and also check U702. * Measure CN701 pin 9/10 for 5V and pin 2 for 1.8V. Inspect for any shorts or cold solder. * Disconnect the signal cable (loosen the green signal cable) to see if the screen shows Block WRGB color bars. * Ensure the power switch is in the Power-On status and not stuck. * Replace U401 and check the signal and LED status. * Check the wire-harness from CN101 for shorted or open components. * Check the Panel-Power Circuit Block. * Replace the Inverter board and check the inverter control relative circuit.