Can’t read disc or can’t open the disk door
Yes
Check the connection 4pin cable from the
main board
Can’t read disc or can’t
open the disk door
Check 45pin and 8pin
cable from main board
connection to the loader is
normal
Replace the loader
NO
GO
Check whether the
DVD loader running is
normal
Fix the connection the 45pin cable or
8pin cable.
NO
Yes
Trouble shooting chart
5-4
Check if U409(pin24)
voltage is normal (about
9.5V)
Fix FB19 or check
U409(pin56)
voltage is OK(about 12V)
NO
Check R148/R151 are normal
(the voltage between two
resistance is 2V
Yes
Fix
or Replace
R148/R151
Yes