LG HDR676X - Page 15

3-3
No 5V for HDD &
DVD Drive
Check D125 and
Replace
Is there about 5.5V
at the IC156 pin1?
Is there about 4V ~ 5V
at the IC156 pin 4?
NO
NO
Check the ‘PWR CTL
“H”’ signal from µ-COM
YES
YES
Check the IC156
and Replace
YES
No 12V for HDD &
DVD Drive
Check D124 and
Replace
Check the ‘PWR CTL
“H”’ signal from µ-COM
Is there about 13.5V
at the IC155 pin1?
Is there about 4V ~ 5V
at the IC155 pin 4?
Check the IC155
and Replace
NO
NO
YES
YES
YES