Repair if the power button on the iMac 27 is not responding or does not work
There is a thing that suddenly does not turn on the power on the iMac, but the place that can be considered as a failure place is per logic board and power board.
In the case of logic boards, it is necessary to investigate fairly carefully, but in the case of power board failure, it is possible to replace parts alone because it will be a separate part from the logic board.
However, unlike the previous iMac, when replacing the power board, it is necessary to peel off the LCD panel, and it is more difficult to peel off the liquid crystal than to replace the power board.
I think that it is possible to refer to it because it exposes how to take out the power board below.
[iMac 27 does not turn on, repair method 1 ]
The flat iMac LCD is not threaded, but is attached to the main unit with very powerful double-sided tape.
The way to peel off is to tear off the liquid crystal by inserting the tool into the gap between the liquid crystal and the main body as shown in the image, but this work is required even when replacing the power board, iMac 27 I feel that the decomposition of a1419 has become a higher hurdle than the previous model.
I think that there is something that can be substituted in addition to the tool of the image, but the tool of the image is very easy to use because it is a roller type.
I think that it is per playing cards as a substitute, but it is not possible to insert it into the gap if it is not a fairly thin thing.
[iMac 27 does not turn on, repair method 2 ]
Double-sided tape is attached to one lap of the liquid crystal, but the place where the tool is inserted is all right and left.
The lower side peels off without permission by the weight when opening the liquid crystal later.
[iMac 27 does not turn on, repair method 3 ]
On top, you can float the liquid crystal a little as in the image when tearing the left and right double-sided tape, but please be careful because I think that there is a cable on the back of the liquid crystal when you look inside.
[iMac 27 does not turn on, repair method 4 ]
There are two cables on the back of the LCD, but first it is removed from the cable on the right side that you looked into.
It is how to remove the cable, but it has become possible to remove it easily if it pulls it upward as it is.
[iMac 27 does not turn on, repair method 5 ]
This is the golden connector on the left side, but don't pull it out as it is.
There is a hook of "co-shaped", so let's pull out the cable itself after raising the hook with the nail.
Now that you can remove all the cable connections, let's remove the liquid crystal while slowly pulling it back to the front as it is.
[iMac 27 does not turn on, repair method 6 ]
Only the liquid crystal was able to be removed.
Please note that there is a weight because there is a thing that the glass and the liquid crystal panel are integrated and 27 inches.
[iMac 27 does not turn on, repair method 7]
The screws are in a row on the underside of the liquid crystal that I removed earlier, but all of them are removed.
[iMac 27 does not turn on, repair method 8]
If the screw can be removed, the metal plate can be removed.
[iMac 27 does not turn on, repair method 9]
This is the speaker, but remove the red circle screw.
[iMac 27 does not turn on, repair method 10]
Pull the connector connected to the logic board next to the hard disk upward.
[iMac 27 does not turn on, repair method 11]
This is the connector on the left side of the power board, but pull it out toward the left side.
[iMac 27 does not turn on, repair method 12]
You can now remove the speaker on the left side.
[iMac 27 does not turn on, repair method 13]
We will finally remove the power board, but the power board is connected by screws and connectors, so let's remove all screws on the four corners.
In addition, the cable on the right side can be removed by pulling out.
[iMac 27 does not turn on, repair method 14]
There is a large connector on the back side of the power supply board, but there is a protrusion on the back side and you can remove it by pulling the wiring while waking it up with a finger.
[iMac 27 does not turn on, repair method 15]
There is a connector under the connector and the back side of the previous, but it is possible to remove it if you pull it while causing the nail.
[iMac 27 does not turn on, repair method 16]
The power board could be removed from the iMac 27.
If you do not feel that it is moving at all even if you press the power button, there is a thing to improve by the power board replacement.
If the symptoms do not change even if the power board is replaced, it is recommended that you consult the repair shop without hesitation because it seems that it is almost logic board failure.