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Details of Servicing and Troubleshooting > Troubleshooting
IC156 Pin1 :
Approx. 5.5V?
Check IC156, and
replace if necessary.
C156 Pin4 :
Approx. 4V-5V?
Check D125, and
replace if necessary.
Check the PWR_CTL_H
signal from IC701 Pin43.
NO
NO
YES
YES
No 5V for HDD & DVD
IC155 Pin1:
Approx. 13.5V?
IC155 Pin4:
Approx. 4V-5V?
Check D124, and
replace if necessary.
Check the PWR_CTL_H
signal from IC701 Pin43.
Check C155, and
replace if necessary.
NO
NO
YES
YES
No 12V for HDD & DVD