LG FLATRON T710P Service Manual page 22

Stand-by/SUSPEND/
DPMS OFF MODE FAILURE
IC401 (MICOM)
PIN 52, 53 (H/V INPUT)
IC401 PIN 45, 46
3 4
WAVEFORM?
IC401 PIN 16 (5V, HIGH)?
IC401 PIN 10, 50 ?
CHECK B + LINE
(50V, 13V, 80V, 5V) ?
TROUBLE IN
Waveforms
3
C401, #45
5. TROUBLE IN DPM
CHECK
SIGNAL?
NO H/V SYNC SIGNAL
CHECK
YES
CHECK
YES
CHECK
YES
YES
T901 or PC
4
INPUT H/V SYNC SIGNAL
NO
NO
NO
NO
MODE
IC401, #46
- 22 -
CHECK PC,
(PC IS NOT GOING INTO DPM
MODE)
TROUBLE IN
X401, IC401
TROUBLE IN
IC401
TROUBLE IN
IC401
TROUBLE IN
Q941, Q951
DPMS TABLE
ITEM
H/V SYNC
NORMAR ON/ON NORMAL
STAND-BY OFF/ON OFF(0V)
SUSPEND ON/OFF OFF(0V)
OFF OFF/OFF OFF(0V)
VIDEO LED
GREEN
FLASH
FLASH
FLASH