User Guide

8081
8081
N/B Maintenance
N/B Maintenance
120
8.10 Audio Failure
No sound from speaker after audio driver is installed.
Re-test
OK?
Test
OK?
Audio Failure
1. Check if speaker cables are
connected properly.
2. Make sure all the drivers are
installed properly.
1.Try another known good
speaker, CD-ROM.
2. Exchange another known
good charger board.
Board-level
Troubleshooting
Yes
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.
1.If no sound cause
of line out, check
the following
parts & signals:
2. If no sound cause
of MIC, check
the following
parts & signals:
3. If no sound cause
of CD-ROM, check
the following
parts & signals:
No
No
Parts:
U523
U15
J9
R775
R768
L539
L540
R772
Signals:
AOUT_R
AOUT_L
LINE_IN#
SPK_OFF
Parts:
U9
U523
J10
L537
Signals:
H8_AVREF
MIC1
Parts:
U523
J504
R787
R790
R789
Signals:
CDROM_LEFT
CDROM_RIGHT
CDROM_COMM
Correct it.
Correct it.
Replace
Motherboard