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Правка отклонена автор Evan Noronha

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[* black] WARNING: UNDER NO CIRCUMSTANCES SHOULD YOU TOUCH ANYTHING METAL INSIDE THE COMPUTER, OR THE LOGIC BOARD ITSELF, IF YOU BOOT THE COMPUTER UP IN A DISASSEMBLED STATE, EVEN IF THE POWER SOURCE IS ONLY FROM A BATTERY. I do NOT recommend that anyone does this unless its absolutely necessary in order to assist you to identify the cause of a faulty fan
[* black] The computer boot up test was helpful in my case because it proved that the new left fan that had been installed wasn't faulty after all, and established that there was an issue with the left fan logic board push on connection point.
[* black] The computer was then switched off before proceeding to reinstall the new left fan back into its intended design location, and it was established that the fault still existed after another computer boot up test was undertake.
[* black] At this point, whilst the computer was still running I decided to use the plastic spudger tool to apply increased pressure on the top of the left fan logic board connection point, and to my surprise and relief the left fan started working immediately, however, it stopped working again as soon as the additional pressure
[* black] being applied to the top of the fan logic board connection point was released. This situation lead me to inspect the left fan connection point on the logic board very closely using a magnifying glass, which revealed a very slight distortion of the plastic connection point on the logic board.
[* black] I suspect that the distortion to the logic board left fan connection point was caused whilst the spudger tool was being used to remove the fan connection lead when the faulty fan was first removed. A very careful bit of prodding around using a magnifying glass, and the plastic spudger tool
[* black] resolved the slight distortion to the left fan logic board connector, following which when the fan was plugged back in again it working immediately, without the need for any additional pressure to be applied to the top of the logic board connection point.
[* black] IMPORTANT: DONT FORGET TO CLEAN OUT THE CPU COOLING FAN GRILLS . Mine were partially blocked with nine years worth of black dust! When the computer was assembled it worked perfectly thanks to this excellent guide. The problem I encountered replacing the fan highlights the need to treat fan connection points on the logic board with the utmost care!