TS2P

Excessive upper internal

Verify that the skin temp sensor cable

 

 

enclosure temperature, or

is securely connected to the top of the

 

 

Skin temp sensor damaged/

logic board and sensor is attached to

 

 

disconnected from top of logic

rear housing (near the camera). Replace

 

 

board.

the sensor cable if damaged.

 

 

 

 

 

TC0H

Excessive processor heatsink

Check CPU sensor cable connection to

If the sensor is

 

temperature, or CPU temp

logic board. It requires removal of the

disconnected, the

 

sensor damaged/disconnected

logic board.

CPU fan will run at full

 

from back side of logic board

 

speed.

 

(this sensor is part of logic

 

 

 

board)

 

 

 

 

 

 

TG0D

Excessive graphics processor

Test with known-good video card

 

 

die temperature (this sensor

 

 

 

is part of graphics processor

 

 

 

chip)

 

 

TG0H

Excessive graphics processor

Check GPU sensor cable connection to

If sensor is

 

heatsink temperature, or

logic board. It requires removal of the

disconnected the CPU

 

GPU temp sensor damaged/

logic board.

fan will run at full

 

disconnected from back side of

 

speed.

 

logic board (this sensor is part

 

 

 

of video card assembly)

 

 

Tp1P, Tp2H,

Excessive power supply

Test with known-good power cable

 

Tp3H

temperature (these sensors

harness , or known-good power supply

 

 

are part of the power supply

board.

 

 

board)

 

 

ODD fan

Optical fan/blower located

Verify that the ODD blower/fan cable is

Normal fan operation,

 

next to right speaker

securely connected to the right side of

except the ODD blower

 

 

the logic board and that there are no

 

 

 

obstructions that would prevent the

 

 

 

blower/fan from rotating. Replace fan if

 

 

 

the error continues.

 

HDD fan

Hard drive fan/blower, located

Verify that the HDD blower/fan cable

Normal fan operation,

 

below logic board, near hard

is securely connected to the top of

except the HDD blower

 

drive

the logic board and that there are no

 

 

 

obstructions that would prevent the

 

 

 

blower/fan from rotating. Replace fan if

 

 

 

the error continues.

 

CPU fan

CPU fan/blower, located next

Verify that the CPU blower/fan cable is

Normal fan operation,

 

to left speaker (logic board has

securely connected to the left side of

except the CPU blower

 

to be removed to replace CPU

the logic board and that there are no

 

 

blower)

obstructions that would prevent the

 

 

 

blower/fan from rotating. Replace fan if

 

 

 

the error continues.

 

2010-09-09

iMac (27-inch, Mid 2010) — General Troubleshooting 26

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Image 26
Apple MD094LL/A manual Board Sensor cable if damaged, Logic board this sensor is part Video card assembly