Sharp LC-26GA3E Service Manual page 41

TROUBLE SHOOTING TABLE
Are there Rx0, 1, 2 and C signal
inputs to IC1900 (HDCP,LSI)?
YES
Are signals sent from Hsync (pin 18),
Vsync (pin 19) and RGB (pins 23, 26
and 31)?
YES
Are DVI_SR/SG/SB and DVI_H/V
signals sent from MD connector?
YES
Are DVI_SR/SG/SB and DVI_H/V
signals supplied to IC3700 (ADC)
and 3701 (SYNC_SELECTOR) on
the main PWB?
YES
Check IC3700, IC3701 and their
peripheral circuits.
Image from DVI input does not appear (digital AV is not displayed) (3)
NO
Are IC1911 data accessed by I2C
when connected to PC?
Are outputs at pins (12) and (14) of
IC1917 both (H, H)?
Do output pins (12) and (14) of IC1917
become (H,L) when analog PC mode
is entered?
Check ME connector I2C signal line.
NO
Check IC1900 and its peripheral
circuits.
NO
Check IC1901, IC1903 and their
peripheral circuits.
NO
Check MD harness for disconnection.
(Continued)
YES
NO
YES
NO
YES
NO
41
LC-26GA3E
Check PC settings.
Check IC1911 and its
peripheral circuits.
Check IC1917 and its
peripheral circuits.