1

00:00:00,333 --> 00:00:05,766

Hello everyone, today we will learn how to repair the progress bar on the startup screen of the Apple laptop

2

00:00:09,333 --> 00:00:13,200

The progress bar on the start-up screen means that after booting up,

3

00:00:13,500 --> 00:00:17,333

the screen has shown that the system is in the process of starting up

4

00:00:19,933 --> 00:00:23,366

For example, this picture, the system is loading

5

00:00:24,033 --> 00:00:30,800

But it has been stuck in this startup interface, unable to enter the normal operation interface of the system

6

00:00:32,800 --> 00:00:37,433

Unable to enter the system normally, the progress bar cannot be loaded

7

00:00:38,133 --> 00:00:43,466

We call this kind of failure stuck progress bar, or it can also be called a crash

8

00:00:43,966 --> 00:00:48,466

This kind of failure is usually caused by abnormality of external equipment,

9

00:00:50,233 --> 00:00:54,066

such as damage to the touchpad, water damage to the keyboard,

10

00:00:54,500 --> 00:00:59,100

failure of the interface circuit, abnormality of the firmware of the EC,

11

00:00:59,300 --> 00:01:01,633

or a problem with the BIOS, etc.

12

00:01:02,200 --> 00:01:04,633

This can also happen with graphics cards

13

00:01:07,066 --> 00:01:12,400

Our solution is to use the U disk to directly format the entire disk and reinstall the system

14

00:01:16,333 --> 00:01:19,466

But doing so will erase all files on the hard disk

15

00:01:22,766 --> 00:01:29,000

Therefore, if conditions permit, you can use your own hard drive to test the installation system

16

00:01:30,500 --> 00:01:33,133

You can also try reflashing the BIOS

17

00:01:34,200 --> 00:01:37,533

Then remove each peripheral one by one to troubleshoot

18

00:01:39,000 --> 00:01:43,633

Or check the working condition of the graphics card, replace the graphics card

19

00:01:45,800 --> 00:01:48,866

You can also try to force shutdown, clear the cache,

20

00:01:48,866 --> 00:01:51,733

and then turn it on to test whether it is normal

21

00:01:53,700 --> 00:01:56,000

Ok, let's look at this fault next

22

00:01:57,300 --> 00:02:00,800

If the icon of "forbidden to start" appears after booting,

23

00:02:01,833 --> 00:02:06,933

this kind of failure is generally caused by the system version being too high or too low

24

00:02:07,500 --> 00:02:11,200

Some models are caused by EC failure or T2 failure,

25

00:02:11,933 --> 00:02:14,533

and it may also be caused by water corrosion

26

00:02:17,933 --> 00:02:23,000

For this kind of failure, we usually replace the Apple system that matches the model first,

27

00:02:23,000 --> 00:02:25,200

or repair the T2 firmware

28

00:02:30,266 --> 00:02:33,233

Disassemble and check for the signs of water ingress

29

00:02:34,733 --> 00:02:36,400

If there is water corrosion,

30

00:02:36,633 --> 00:02:39,900

it is necessary to clean and repair the water corrosion part

31

00:02:43,066 --> 00:02:48,066

Ok, this is the failure of the stuck progress bar of the boot screen and the repair of this fault