iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 71
2010-09-09
5. Check that the 4 wire SATA
power cable (carrying 12v and
5v DC) is correctly connected
to the Hard Drive (other SATA
power connector has less wires
and is reserved for 5v DC only,
optional SSD drive). Inspect
internal drive(s) SATA and
power cables and connectors
for bent pins, or other damage
to the cable(s).
Yes Replace any damaged SATA
Bus or SATA Power cable. For
the internal SATA drive(s), the
DC power comes from the
main DC power cable harness.
Go to step 8.
X03
No Go to step 6.
6. Reseat internal drive(s) SATA
data cable(s) at logic board
and drive ends, and verify if
computer boots up successfully.
Yes Go to step 8.
No Replace boot drive SATA
cable. Go to step 8.
X03
7. Test with a known-good
bootable drive. Verify if system
boots successfully and that Disk
Utility “Verify” function reports
no errors.
Yes Reinstall user’s drive.
Go to step 9.
No SATA data cable was veried
or replaced, and known-good
drive is installed:
-If hard drive does not spin up
when system is powered on,
replace DC power harness; if
the no spinning issue persists
after DC cable was replaced,
replace Power Supply.
-If hard drive spin up sound
can be heard when system
is powered on, but system
cannot boot from it , replace
logic board.
X03
P99
M19
8. Reboot computer. Verify if
system boots successfully and
that Disk Utility “Verify” function
reports no errors.
Yes Issue resolved. Return system
to user.
No Go to step 7.
9. Reboot computer. Verify if
system boots successfully and
that Disk Utility “Verify” function
reports no errors.
Yes Issue resolved.
No User’s hard drive appears to
be defective. Go to step 10.
10. Replace aected internal drive.
Boot from system-specic
Install DVD and reinstall Mac
OS X with drive format option.
Verify if drive is formatted
correctly (GUID partition table)
and that software restore was
successful.
Yes Issue resolved by replacing
aected internal drive.
H01
No SATA data cable veried/
replaced and new drive
installed, Check with known-
good restore DVD. If restore
failure still happens, go to
step 11.