What s going on with a mechanical noise when an Apple computer boots up and a question mark in the m

Could it be that there is a problem with the system, it is recommended that you go for repair.

Workaround:

1. Clean up the dust on the fan, use a soft-bristled brush to brush off the dust on the fan, or use a hair dryer to blow off the dust.

3. Directly replace the cooling fan of the CPU or power supply.

The automatic power on and off of the computer is likely to be a problem with the motherboard, in this case, it is recommended to send it for repair for a professional test.

2. If it is sent from the power adapter, the power adapter is used to supply power to the host and charge the battery, and can step down the 220V AC power to a voltage suitable for the use of the laptop. If the current of the power adapter suddenly becomes louder and the heat is abnormal, you should immediately unplug the power adapter, turn off the machine and send the machine to an HP service center with the power adapter for testing, so as to prevent damage to the machine due to voltage instability caused by the power adapter failure.

We hope you find the above reply helpful.

Is it that the hard disk has not been cleaned for a long time, detect it and there are no bad sectors and fix it! Or is it dirty inside the host? Remove the cover of the main unit and clean up the dust inside (use a hair dryer to blow the dust off, and use a soft brush to clean the inside and under the fan!).

Let's see if it can be solved!

Notebooks are not commonly used.

I've used a notebook before and I also have this problem.

As far as I know, the laptop seems to have a keyboard driver, and I remember that I just reinstalled it.

Right-click on "My Computer" Properties: Hardware, Device Manager, and see if there is a yellow icon with a question mark in it, if there is, double-click on it, put it into the notebook's built-in driver, and then click Reinstall Driver, and wait...

If you don't have a yellow question mark icon, I can't help you...

Keyboard problem, a different keyboard should be fine.

Let's take a look at what I said upstairs.

No, that's the problem with the keyboard, go to the after-sales service and take a look at the free z6 ...... during the warranty period

It is recommended to buy an external keyboard for about 30 yuan in the future......

If so. This issue is caused by a system crash or a failed hard drive volume! If you can't find the system path at boot, it will prompt this!

However, the network speed environment is better, and the time is longer. If you are not familiar with it, it is recommended to go to a specialty store or spend some money after sale to make a skilled one!

Other than that! Your profile is gone. And it's that both systems are gone! You need to redo Apple first, and then install Windows.

If you want to protect the data, don't do anything, go directly to the Apple authorized service provider to disassemble the hard drive, try to read the hard drive, and keep the data!

If it doesn't matter if the data is restored, press and hold command plus r and don't let go, turn on the computer. Let go after the earth logo appears, and the link to the wireless network ** is restored! There will be time to show the progress after success! If you don't succeed and can't see the progress, try a few more times! If it doesn't work, it's after-sales!

Change the graphics card first.

Colorful GT240-GD5 CF Platinum Edition 512M is less than 700M

It is better to add 2G of RAM.

The graphics card is not working, it is better to change to a 2 g one, it is recommended to reinstall the system, and everything is done.

Change the graphics card of Rainbow with a graphics presence of 512 or more including 512

I've also encountered this situation, which is usually caused by the interference of the sound card driver and other software, or the sound card driver is incorrect.

Recommendations:1Check whether the recently installed software is compatible or interferes with it.

2.If the first point doesn't work, uninstall the sound card and reinstall it.

Double-click the little horn on the bottom right to see if it turns the microphone on.

If so, let's take it.

It is recommended that you update your sound card drivers.

If it is used normally after turning on, it may be that the current generated by the shutdown has affected the speaker.

This is quite normal! I have it at home.

Either the signal magnetic interference, or your audio circuit is problematic, or the speaker itself has a problem, these problems can be tried to eliminate by yourself, lz can check it!

1. First, click on the Finder icon as prompted in the figure below.

2. Then click on the application on the left side of the Finder according to the arrow instructions.

3. Drag the unzipped file into the application, and then double-click the software to open it.

4. Click Custom, and a fixed speed window will pop up.

5. If the temperature reaches more than 70°, it is recommended to set it to a fixed value of 4000.

If your driver has not been updated, you have been using this driver, you should check the speaker, too much air humidity will also make the speaker have problems with sound reproduction, in addition, if you just adjust the volume switch when there is a slight noise, then the problem should be on the wither switch, generally caused by surface oxidation after moisture.

After installing the 64-bit Vista Mac driver, I found that there are 4 outputs (left, center, right + bass) on the audio device from the audio settings manager.

But the mac was found in the binaural channel.

I think the problem is that the bass volume is too loud, and when it vibrates, it hits every edge. If there is no fault, please ask if it is any other case.

Something got into the mac's sound hole.

Look for articles on the Internet to dismantle Mac, open the back cover of Mac, and blow it.