Brand:
LG
Category: Monitor
Document Type: Manual
Language: EN
Manual for 27UL500
Uploaded: Nov. 21, 2025, 8:39 p.m.
Troubleshooting and error codes
| No Power | ||||
| Check JP400 Voltage Level (19V) | N | Check Power connector OK? | Y | Replace Adapter |
| Y | Replace IC601 & Recheck | |||
| Check IC601 Output Voltage Level (+3.3V) | ||||
| Y | ||||
| Check IC405, IC403, IC404 Output Voltage Level (5V, 1.8V, 1.15V) | N | Replace IC405, IC403, IC404 &Recheck | ||
| Y | ||||
| Check X200 Clock 12MHz | N | Replace X200 | ||
| Y | ||||
| Replace IC202 Flash Memory | ||||
| No Screen on | ||||
| Module Back Light On? | N | Check WLED_ENABLE High? (IC601 Pin #27) | N | Check IC 601 Replace Main Scaler IC |
| Y | ||||
| Check Panel Power 10V(JP209) | N | Replace IC402 & Recheck | ||
| Y | ||||
| Check e-DP Cable for Damage or Open Conductors | N | Replace Cable | ||
| Y | ||||
| Replace T-Con Board or Module |