Specifications

LED Cinema Display (24-inch) Symptom Charts — Startup and Power Issues 18
2010-02-08
Unplug and replug the Mini 2.
DisplayPort connector into a
supported system and monitor
the portable’s display. Verify
that the portable’s display
briey turns o then back on.
Yes Logic board OK. Go to
Blank/No Video symptom
code ow.
No Go to step 3.
Remove LCD panel and 3.
disconnect LCD function
interface cable. Verify voltage
on logic board between test
point TP11 (24.5VDC) and
chassis ground (GND) is
23.3–25.7 VDC.
Yes 24.5VDC from power supply
OK. Go to step 4.
No No power or incorrect power
at logic board.
Go to step 6.
Verify voltage on logic board 4.
between test point TP61
(3.3VDC) and chassis ground
(GND) is 3.1–3.5 VDC.
Yes 3.3VDC power on logic board
OK. Go to step 5.
No No power at logic board.
Go to step 9.
Verify voltage on logic board 5.
between test point TP13
(12VDC) and chassis ground
(GND) is 11.4–12.6 VDC.
Yes All DC voltages present on
logic board; power OK. Go to
Blank/No Video symptom
code ow, Step 3.
No No power at logic board.
Go to step 9.
Ve6. rify all connections between
power supply, all-in-one cable,
and logic board are secure. See
Functional Overview.
Yes If connections are secure and
display still does not function
correctly, go to step 8.
No Reseat connectors and retest.
Disconnect power supply cable 7.
from logic board. Verify cable
voltage at connector between
Pin 1 and chassis ground
(GND) is 14.3–15.8 VDC.
Yes Go to step 8.
No
No power or incorrect power
to logic board.
Replace power supply.
P01
Disconnect all connectors from 8.
the logic board EXCEPT the
power supply cable.
Verify voltage on logic board
between test point TP11
(24.5VDC) and chassis ground
(GND) is 23.3-25.7 VDC.
Yes Power supply OK. Suspect
possible short, damaged
connector, or faulty sensor/
fan/speaker. Reconnect
connectors one at a time and
retest for 24.5VDC at TP11.
Replace aected part that
causes the 24.5VDC voltage to
disappear.
L14
No
Replace power supply. P01