Sharp LC-42SB45U Service Manual page 39

MINI AV_UNIT:
Is the HOT_PLUG detection function of pin (19) of a HDMI terminal
(CN701) normal?
YES
Are EDID data pin (6)(SCL) of IC U700 (EEPROM), pin (5)(SDA)
accessed, and is it read from pin (15), (16) of a HDMI
terminal(CN701)?
YES
Is TMDS signal input into pin (AF15, AE15)/RX2±, (AF14,
AE14)/RX1±, (AF13, AE13)/RX0±, (AF12, AE12)/RXC± of IC U400?
Refer to "The picture doesn't appear in all modes."
Does not the picture of the PC IN(ANALOG) video signal input to VGA input 7 (15pin-D-SUB terminal) go out?
TERMINAL_UNIT:
Is R/G/B/H/V signal sent to pin (1)/R, (2)/G, (3)/B, (14)/H, (13)/V of
VGA (CN554)?
MAIN_UNIT:
Is R/G/B/H/V signal sent to pin (AE18)/R, (AE17)/G, (AF16)/B,
(AC16)/H, (AB17)/V of IC U400?
Refer to "The picture doesn't appear in all modes."
↓
↓YES
<External input VGA>No picture on the display (10)
↓
↓
↓YES
↓YES
2008-03-14
NO
Check the line between pin (AA4) of IC U400 and CN701.
Check the connection and setup with the external HDMI devices.
NO Is access possible in the re-writing or exchange of EDID data of
IC U700?
Check CN701, IC U700 and peripheral circuits.
NO Check the line between IC U400 and CN701.
NO
Check the setting of an external input device that connects of
CN554.
NO
Check the line between IC U400 and CN554.
39
LC-42SB45U
↓
↓NO