Genius SW-HF 5.1 6000 - 1.2.3 Front channel no sound

Service Guide SW-HF 5.1 6000
1.2.3 Front channel no sound (including either FR or FL no sound )
Problem
Analyze and
identify the
causes
Solutions
Version 1.0 Page 9 of 36
Front channel no sound (including either FR or FL no sound)
PCB damaged,
dry-soldered or
short-circuited
Poor connection of
front speaker cables
and jacks, or
defective speaker
cables, jacks or front
driver units
1.defective IC1, IC2 or
components relating to IC1 and
IC2 on INPUT PCB
2.defective IC4 ， IC1 or
components relating to IC4
and IC1 on AMP PCB
Resolder or
replace
Re-connect or
replace
Check and replace
defective IC or
components
Defective
connection of front
audio cables, or
JACK disconnected
from PCB or
defective
Re-connect or
replace