Hisense PDP4220EU Service Manual page 13

TV audio?
No sound
no
Check audio board connections
/change audio board
Black bars on panel
Red(green/blue) line on panel
Red(green/blue) stripe on panel
Big noise from panel
Note:
p.LED?
Power indicator at the right-bottom corner of the front panel. Normal state :blue; remote command state: bule flickering.
L.LED?
LVDS indicator on the logic processing board. Normal state: yellow flichering.
osd?
Press [MENU] to display menu on the screen.
VGA/HDT
V?
Whether the VGA or HDTV picture display normally.
ok
Check problem channel input part circuit diagram
no
Press mute or stereo button
ok
Check tv channel input part circuit diagram
Replace the plasma display module with spare parts
13
ok
No problem
no
Check other channel?