Sharp LC-32GA3E Service Manual page 43

TROUBLE SHOOTING TABLE
Image from DVI input does not appear (Analog PC is not displayed) (2)
Are there RGB signal inputs at pins
(25), (26) and (27), and Hsync/Vsync
signal inputs at pins (28) and (8) from
DVI connector (SC1900)?
YES
Is each signal sent from Hsync and
Vsync (pin 4, 6), of IC1904
(INVERTER)?
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.
NO
Are IC1915(E2PROM) data accessed
by I2C when connected to PC?
NO
Are outputs at pins (12) and (14) of
IC1917(CONTROL) both (H, L)?
NO
Do output pins (12) and (14) of IC1917
become (L, L) when digital AV mode is
entered?
NO
Check ME connector I2C signal line.
NO
Check IC1904 and its peripheral
circuits.
NO Check IC1901, IC1903 and their
peripheral circuits.
NO
Check MD harness for disconnection.
43
LC-32GA3E
LC-37GA3E
(Continued)
YES
Check PC settings.
YES
Check IC1915 and its
peripheral circuits.
YES
Check IC1917 and its
peripheral circuits.