Sharp C6400U Service Manual page 125

COMPONENT: No external input video [INPUT-5]
Is INPUT-5 selected on the input select menu screen?
Is the INPUT-SELECT for the input signal?
NO
Select INPUT-5 on the input select menu screen for the
right input signal.
Does the COMP1_PLUG detection function?
Check the line between pin (17) of input terminal (J510)
and pin (L32) of IC3303 (CPU).
YES
Is the T-CON PWB connected?
VBO_HTPDN (40pin), VBO_LOCKN (39pin) of P2604 become Low if there is no prob-
lem in the connection.
YES
Are the V-By-One signal input to the pin of P2604?
VBO_CN_TXA+/- (36/37pin), VBO_CN_TXB+/- (32/33pin),
VBO_CN_TXC+/- (28/29pin), VBO_CN_TXD+/- (24/25pin).
YES
Check the panel module and harness.
LC-52/60/70LE640U/C6400U,LC-80LE633U/844U (1st Edition)
No video (2)
NO
NO
6 – 7
Check the panel module and harness.
Check IC3303 and its peripheral circuits.
(IC3501/IC3502/IC3503, etc.)