198
LCD PC E
LCD PC E
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-
8590 MAINTENANCE
8590 MAINTENANCE
Board-level
Troubleshooting
Correct it.
1. Check if speaker cables are connected
properly.
2. Make sure all the drivers are installed
properly.
Test
OK?
Audio Drive Failure
1.Try another known good speaker,
SPDIF cable,CD-ROM.
2. Exchange another known good
I/O board.
Re-test
OK?
Replace
Motherboard
Yes
Correct it.
Yes
Check the following parts for cold solder or one of the following parts on the
motherboard may be defective,use an oscilloscope to check the following signal
or replace parts one at a time and test after each replacement.
Signals:
AOUT_R
AOUT_L
HP-L
HP_R
DEVICE_DECT
SPDIFOUT
+VA
AC97_RESET
AC97_SDOUT
CODEC_XIN
2. If no sound cause
of MIC, check
the following
parts & signals:
3. If no sound cause
check LINEIN& CD-
ROM, check the following
parts & signals:
Parts:
J13
R6
R4
J12
C227
U15
Signals:
MIC
MIC_VREF
Signals:
CDROM_L
CDROM_R
CDROM_GND
CDROM_LEFT
CDROM_RIGHT
J14
Line_r
Line_l
Parts:
U18
U6
U17
U15
10U
J7
J6
U16
J12
R33
R34
R14
C16
C17
L7
L6
D1
L3
L26
C3
R3
C2
If no sound cause of LINEOUT,
SPDIFOUT,check the following
Part&signals:
Parts:
R212
U15
J12
R51
R52
L8
L9
J14
J18
R172
R186
R181
C248
8.14 Audio Failure
Symptom: No sound from speaker after audio driver is installed.
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