TU-32GD1E (serv.man8). Trouble shooting table - Sharp TV Service Manual (repair manual). Page 12

Are the R/G/B and DTV-H/V signal 
input from Pins (25)(26)(27) and Pins 
(28)(8) of INPUT5=DVI Connector 
(SC1900) respectively?

Is the DVI-H/V signal output from 
Pins (4)(6) of IC1904 (INV)?

Are the DVI-SR/SG/SB and the DVI-
H/V signal output from the MD 
Connector (P1900)?

Are outputs at pins (12) and (14) of 
IC1917 both (H, L)?

Check PC settings.

Check IC1915 and its 
peripheral circuits.

Check IC1917 and its 
peripheral circuits.

Check IC1904 and its 
peripheral circuits.

Check IC1901, IC1903 and 
their peripheral circuits.

Do pins (12) and (14) become (L, H) 
when digital AV mode is entered?

Check Pins (1)(2) of IC1917 thru Pins 
(8)(9) of the ME Connector signal line.

Are IC1915 data accessed by I2C 
when connected to PC?

Are the DVI-SR/SG/SB and the DVI-
H/V signal input to Pins 
(126)(136)(141) of IC3700 (ADC) and 
Pins (2)(5) of IC3701 (SYNC_SEL) in 
the MAIN-PWB respectively?

Check MD harness for 
disconnection.

Check IC3700 (ADC), IC3701 (SYNC-
SEL) and their peripheral circuits.

DVI Input (Analog PC mode)