Sharp Lc-40le185m Service Manual (HD — 4K)

If the voltage remains at zero, the LED driver IC or step-up MOSFET on the PSU board is defective. Fault 3: TV Turns On and Immediately Shuts Down

When the TV detects a failure in the LED backlight strips, it enters a protection mode. Even after replacing the physical backlights, the error may persist because it is stored in the TV's memory.

HDMI, USB, Component In, AV In, Digital Audio Out (Optical), Headphone Jack sharp lc-40le185m service manual

Press and hold the and Input/Source buttons on the side control panel of the TV simultaneously.

Press the and Channel Down (v) buttons together on the TV panel to open the full multi-page engineering service menu. If the voltage remains at zero, the LED

Shine a bright flashlight closely against the LCD screen while the TV is on. If you can see faint images moving in the background, your LCD panel works, but the LED backlights are off.

Symptom 4: Distorted Picture, Double Image, or Vertical Lines HDMI, USB, Component In, AV In, Digital Audio

Safety reminder: TVs contain high-voltage capacitors and exposed panel voltages—disconnect mains and discharge capacitors before probing.