Confirms partial power and shifts diagnosis away from total no-power.
Fault route
LGK100L Fan Runs But Display Is Off Diagnostic
A display-supply route for LGK100L machines where the fan runs but the digital display is blank.
Quick Answer
If the LGK100L fan runs but the digital display does not show, split display-head failure from control-board DC5V evidence at X13.
- The workflow checks control-board X13 1# and 2# for DC5V supply to the display.
- If DC5V is present, the display head can be the faulty part.
- If DC5V is missing, inspect the control board or its supply path before replacing the display.
Use this page when
- Fan runs, so at least part of the machine is powered.
- The digital display is blank.
- X13 display supply can be measured.
Do not use this page when
- Fan is not running and display is off.
- Input breaker trips.
- Display works but output is missing.
LGK100L fan-runs / display-off route
Use DC5V display supply to split display head from control board.
Measure X13 1# and 2# for DC5V display supply evidence.
If DC5V exists, inspect or replace the display head.
If DC5V is missing, inspect the control board supply/output path.
Display evidence table
| Evidence point | Expected / abnormal evidence | Repair direction |
|---|---|---|
| Fan running | Partial machine power exists. | Do not use total no-power route first. |
| Control-board X13 1# / 2# | DC5V should be present for display supply. | If present, replace display head; if missing, inspect control board/supply. |
| Display head | DC5V present but display blank. | Replace display head or repair display wiring. |