HP PL4260N Service Manual page 60

Failure type
Source: S-VID/VID1, S-VID/VID2
Description: NO SIGNAL/Menu display only, and no
video picture, other source is OK.
Inspection items
1 Change P. Mode to Standard Mode and check
signal cable.
2 Check whether there is signal input to correctly
composite terminal.
3 Open the back cover.
4 Check power connector XP004 and pin
#TAB/N801=+5V,#TAB/N802=+2.5V,
#TAB/N803=+3.3V,
#TAB/N804=+1.2V,#TAB/N805=+9V,
#TAB/N806=+5V.
5 Check whether there is correct signal on pin
#13(Y)/14© of NH01 on TB.
6 Check whether there is correct signal on pin
#33(Y)/31© of CON28 on MB.
7 Check whether there is correct signal on close
U9 pin of C88(Y)/C91© on MB.
8 Replace the MB if the other steps are correct.
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HP High-Definition Plasma TV Service Manual PL4260N, PL5060N
Picture
C88 is on bottom layer of MB.
C91: s-video C signal into
Remarks
NH01: video