LG FLATRON 915 FT PLUS Service Manual page 16

STAND-BY/SUSPEND/
OFF MODE FAILURE
CHECK
IC271 (MICOM)
PIN 42, 1 (H/V INPUT)
SIGNAL?
INPUT H/V SYNC
CHECK
IC271 PIN 6, 7
WAVEFORM?
YES
CHECK
IC271 PIN 17
(5V, HIGH)?
YES
CHECK
IC905 PIN 7
(15V) ?
YES
CHECK
B + LINE
(12V, 15V, 80V,
5V) ?
TROUBLE IN
T901 or PC
5. TROUBLE IN DPM
NO H / V SYNC SIGNAL
NO
NO
NO
NO
Item
H / V SYNC
Mode
ON / ON
NORMAL
OFF / ON
STAND-BY
ON / OFF
SUSPEND
OFF / OFF
OFF
CHECK PC,
(PC IS NOT GOING INTO
DPM MODE)
TROUBLE IN
X201, IC271
TROUBLE IN
IC271
TROUBLE IN
Q903, IC913, D914
TROUBLE IN
R938
DPMS TABLE
VIDEO
NORMAL
OFF(0V)
OFF(0V)
OFF(0V)
LED
GREEN
ORANGE
ORANGE
ORANGE