Main Board Failure Check - Haier DX-LTDVD19-09 Service Manual

9.3 Main board failure check

State: No picture
No Sound
(All Mode)
Check the input
Source
Pass
Check the input/output
Of IC U13 of Main B/D
Pass
Check the input/output
Of IC U55 of Main B/D
Pass
Check the input/output
Of IC U2 of Main B/D
Pass
Check the Speaker
Pass
Check the Sperker
wire
Fail
Fail
Fail
Fail
Fail
33
Change Source input
Re-soldering or change
IC U13
Re-soldering or change
IC U55
Re-soldering or change
IC U2
Change the Speaker