what to do if the iMac A1207 Ban mark appears and doesn't start
Mac is usually apple mark is displayed when you turn on, but after a while it switches to the password screen and login screen, the screen does not switch easily, there is a case where the prohibited mark is displayed and it is not possible to start.
There is a recovery from "Disk Utility" as a way to try to deal with it yourself when the prohibition mark comes out,
If it does not improve, such as in The Disk Utility, it may cause a hardware failure.
Because it becomes a kind of kernel panic, it is necessary to disassemble and verify one part,
Most of the failures are hard disks, aren't they?
So this time I will post the process until removal in order to verify the hard disk, so please refer to it.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 1]
- When you turn on the iMac, the apple mark is displayed, and you can see that the mark comes out and reads it when it goes round and round down.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 2]
- After a while, the prohibition mark came to be displayed, and it became a state that did not advance at all.
This symptom is the same logic other than this A1207, so you can refer to the same symptoms on other Macs.
[repair and how to deal with when iMac prohibition mark does not start out STEP 3]
- The model number and specifications of the iMac can be confirmed on the soles of the main body.
[repair and how to deal with when iMac prohibition mark does not start out STEP 4]
- This part is directly below the liquid crystal (back side), but the red circle screw is the memory, and the orange part is the one that stops the main body cover.
In the image, there are four orange screws in total, each on both sides.
Remove the four orange screws while removing the screws on the memory cover.
[repair and how to deal with when iMac prohibition mark does not start out STEP 5]
- I was able to remove the memory cover.
It is how to remove the memory, but there is a plastic lever, so if you open it from the inside outward, the memory will pop out, so let's remove it.
[repair and how to deal with when iMac prohibition mark does not start out STEP 6]
- The iMac is made so that the screws are not visible overall.
In order to remove the main body cover, the tool is inserted into the gap like this and disassembled, but the decomposition of the model a little earlier than the recent model has become more complicated.
[repair and how to deal with when iMac prohibition mark does not start out STEP 7]
- I think that you can understand the feeling that the cover comes off when the spatula is inserted into the gap little by little.
[repair and how to deal with when iMac prohibition mark does not start out STEP 8]
- Please do not remove it forcibly because the cable extends to the inside to the front camera part.
The connector part is stopped by Kapton tape, but the tape is peeled off.
[repair and how to deal with when iMac prohibition mark does not start out STEP 9]
- Remove all connectors attached to the front cover side.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 10]
- I was able to remove the connector relation attached to the front cover.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 11]
- It becomes such a state when the cover can be removed.
The yellow tape is attached to the image, but the thing like the aluminum foil of the silver is originally affixed.
Because of the model that is disassembled once, we substitute it with Kapton tape.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 12]
- The LCD panel must be removed to remove the hard disk.
Since the liquid crystal panel is secured with a screw to the main body, it is removed with a Torx screwdriver.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 13]
- There are several screws on the left and right sides of the liquid crystal, so remove them all.
When the screw is removed by the screwdriver, the screw may fall into the inside, but it is easy to work because the screw adsorbs when the magnet is applied to the screwdriver.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 14]
- This part is the underside of the LCD panel.(The place covered with Kapton tape)
The cable extending from the liquid crystal is screwed to the logic board, but this should also be removed with a Torx screwdriver.
If you can remove the screw, the connector will come off easily.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 15]
- Just pull the connector back.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 16]
- If you can remove the screws on both sides and the lower connector, you can knock the LCD panel to the front side as shown in the image, but the cable is still connected inside.
[ASUS TAICHI 31 LIQUID crystal repair and disassembly method STEP 17]
- The LCD panel of the A1207 is CCFL instead of LED, but the red frame is where the backlight cable is connected to the inverter.
The connector can be pulled out by sliding.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 18]
- It was a backlight connector on the upper side earlier, but the connector is connected to the back (lower side) in the same way, so don't forget to remove it.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 19]
- Only the LCD panel was able to be removed from the iMac body.
[repair and how to deal with when iMac prohibition mark does not start out STEP 20]
- I think that it is possible to check the hard disk as soon as it is possible to remove the liquid crystal,
The hard disk is also secured with screws to the main unit.
Remove the red-circle screw with a Torx screwdriver.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 21]
- After removing the previous two screws, move them sideways and pull them out to the front.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 22]
- Depending on the year, in the case of A1207, a temperature sensor cable is installed on the hard disk.
If you do not turn on this temperature sensor cable, FAN will runaway when you turn on, so please do not disconnect it.
It is how to remove it, but it can be easily removed because it is only fixed with double-sided tape.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 23]
- There is a cable at the tip of the hard disk, but it is possible to remove it by sliding it.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 24]
- The hard disk could be removed.
I think that it was not started because there was a failure of the hard disk as a result of the investigation.
It was possible to start without problems when the power is turned on the newly prepared hard disk.
[repair and how to deal with when iMac prohibition mark comes out and does not start STEP 25]
- When replacing the hard disk, port the fastener (stay).
The entire process has been completed with this, but if it does not improve by any chance by replacing the hard disk, it is a logic board failure.
In the case of logic board failure, the repair price will be expensive, so depending on the budget, it may be better to consider replacing it.
