Samsung NT-R70xxxx Series, Service Manual

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4- 2
4.
Troubleshooting
2) Debugging Flow Chart
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Start
Turn on Power
Power on?
Check there is
any short in the
main board.
NO
Check Adapter, Battery
No
problem
Solution : Replace the defected part or revise the connectivity.
Change Mainboard
and check it.
LCD display is
OK?
Check LCD cable
Check LCD
Panel Inverter.
Change memory
YES
Keyboard function is OK?
Check Keyboard
connection and
replace it.
Solution : Replace the defected part or revise the connectivity.
Change Mainboard
and check it.
HDD and ODD
recognition is OK in
CMOS ?
Check the connection
and change the unit.
OS booting is OK?
OS is corrupted ?
Solution : Replace the defected part or revise the connectivity.
Change Mainboard
and check it.
Touchpad
function is OK?
Check Touchpad FFC
Change
Touchpad, and
check function
It is
problem.
Change Mainboard
and check it.
No
problem
No
problem
It is
problem.
YES
No
problem
No
problem
It is
problem.
It is
problem.
It is
problem.
YES
NO
No
problem
No
problem
It is
problem.
It is
problem.
NO
NO
YES
YES
YES
NO
No
problem
It is
problem.
No
problem
No
problem
It is
problem.
It is
problem.
NO
Change Mainboard
and check it.
Change Mainboard
and check it.
It is
problem.