Apple MD094LL/A 사용자 설명서
iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power
47
2010-09-09
4. Pivot enclosure to access
lower intake vent, and locate
on edge of
logic board. Verify if LED #3
turns on shortly after system
powers on.
Yes
Logic board communicating
with video card. Go to step 5.
No
If LED #3 does not turn ON
reseat video card and retest,
then replace video card and
repeat step 4. If issue persists,
replace logic board.
M03
M03
5. Locate
on
logic board. Verify if LED #4
turns on shortly after system
powers on.
Yes
Logic board communicating
with LCD panel. Go to
symptom flow.
No
Replace DisplayPort cable. Go
to step 6.
X03
6. Locate
on
the logic board. Verify if LED #4
turns on shortly after system
powers on.
Yes
Video controller functional
and communicating with LCD
panel. Go to
symptom flow.
No
Video controller unable to
communicate with LCD panel.
Reseat cables first. If issue
persists, replace LCD panel.
Retest.
L03