Nokia 6730c can t turn on, it vibrates twice and doesn t respond

You still have to enter the password after the grid machine restarts

No need to fix it! CPU problem! It won't take a few days to fix it.

Charge it and try again, I guess it's not enough power.

If you can't turn it on, try freezing it first, and then hard if it doesn't work.

Freezing method: remove all kinds of cards and batteries of the mobile phone, wrap the mobile phone with a fresh-keeping bag (preferably with a fresh-keeping box), put it into the freezer layer of the refrigerator, preferably a micro-frozen layer, pay attention to the freezing degree of the refrigerator to the minimum, not too frozen (the battery and card do not need to be put in, if you feel that the battery is not good, you can also freeze, but you should freeze more).

Freeze for about fifteen minutes, not more than twenty minutes, and then take it out of the refrigerator, and then stuff the card and battery into a plastic bag, and assemble it through the plastic bag, because as soon as the cold mobile phone encounters humid air, the mobile phone will be covered with "sweat" in an instant (in fact, you can prepare a towel or paper towel to quickly dry it), assemble it and take it out and put it for five minutes, you can turn it on and try ......

Hard-grid machine. This method is generally used when the system is so chaotic that it can't be turned on

Power off, press and hold the call button + 3 number button + * number key + and then press power on when turning on. Don't let go, not a single one until the handshake icon appears.

This formatting is more thorough and does not cause invalid formatting.

Precautions: Sufficient power must be guaranteed when formatting, and generally it should be operated under full power. It's a good idea to uninstall all the software and see if you get any similar "system errors".

If there are no similar "system errors", then proceed to the grid. Do not attempt to shut down the machine during the grid, do not plug in the charger, etc. Also, try to give priority to the soft grid.

The software part that was originally installed on the expansion card will be affected after the grid, so under normal circumstances, the memory card should be taken out when the card is checked, and the important data of the expansion card will be backed up and then formatted (remember to use the card reader to back up your **** video ...... first.)to the computer), all the programs saved in the E drive are reinstalled after the phone is formatted.

If the hard grid doesn't work, it is recommended that you go to Nokia customer service. Because flashing requires the mobile phone to install the flashing software and the driver corresponding to the model on the computer normally. If you haven't done these preparations, you can't install all the drivers and you can't brush the machine. You can only find customer service.

Mine also has this problem, I have two batteries, one is good, and the other is the problem you said, is that the copper sheet inside that battery is not in good contact, you can use the blade to knock the copper plate to try it.

It is recommended that you try the hard-grid machine first.

Here's how:

1.The phone is not buttoned.

2.Press and hold the volume down button, menu button, and camera button at the same time, and finally press the power on button together until the word nokia appears on the screen, and then you can let go. Then the phone will do it automatically.

3.Because you have to press 4 buttons at the same time, if it is difficult for one person to complete, you can find someone to help you press it together.

4.If it still doesn't work after hard mounting, it means that the circuit components of your phone are broken and need after-sales repair.

I hope Liangxiang will be helpful to you.

It may be that the system is not working, you go to the after-sales department to take a look.

You can go to a non-after-sales mobile phone store to brush the machine, and it doesn't take a few dollars. And now the quality of the brush machine in the place where the mobile phone is repaired should be guaranteed, and the technology is very mature. Then see if your phone is working properly.

If it can't be used normally, you can go to the after-sales service to change a board, or you can go to the place where the mobile phone is repaired to change a piece, but the quality is difficult to guarantee, but if the board is replaced in a more professional place, it can be used normally, but the life may be shortened, but it is cheap. It's up to you to choose. However, 2,000 yuan for a board is indeed expensive, it is better to buy another machine, even if you buy a parallel goods, you can use it for two or three years.

Your phone must have been flooded, or squeezed, or struck by lightning, and you go somewhere else to change the motherboard is not so expensive, hundreds of dollars.

You can look into the three-guarantee method, the phone is guaranteed for one year without human damage (motherboard deformation or liquid ingress), etc. If it is deformed or liquid ingress, the whole machine will not be warranted, and the deformation of the motherboard will not be visible if you don't disassemble it, and it will not have a particularly big impact when you use it in ordinary use. So you don't know .

You can return to the repair center, you just let him help you write the software, if you can write it for about 300, if you can't write it, you buy another one is more practical.

If you want to go to court, be cautious, the cost of mobile phone identification is very, very expensive, if you can go to court for 1 yuan, then you can try.

It depends on whether you update the system yourself to update the unofficial site, or go to the store to update, if it is unofficial, then there is no way, admit bad luck, you have no reason to litigate with others, Nokia did not say that you can update the system by yourself, to be honest, don't mess up if you are not an expert, change the motherboard of 2000, it is better to buy a new !!

Black screen,It may be caused by the third-party software of ****,This situation rarely occurs with the machine.。 It can also be subdivided into two kinds: one is that there is a problem with the software itself, the software itself is unstable, or it does not match the mobile phone system, etc., this is easy to solve, just uninstall it; The second is the conflict between the software and the software, which is a little more troublesome to solve, and requires a software to install and uninstall the software in the experiment.

If you find it, uninstall it, and the problem will basically be solved. Of course, it is recommended not to install too much useless chicken rib software. Although buying a smartphone is to play the machine.

But some software that you don't use at all is a waste.

As for the other situation, most of the straight board machines have a power-saving circuit design: the mobile phone will automatically turn off the screen if it can't detect the key trigger signal for a long time, that is, standby, when you need to use the mobile phone, a button will activate the power-saving circuit, and then the screen lights up! The reason for the black screen is often reflected by the delay of the screen triggering circuit.

That is to say, the mobile phone system has issued a command to light up the screen, but because the circuit is delayed, it is not sent successfully, and the screen is not lit successfully, but the mobile phone system thinks it has been lit, so it causes a black screen. You can give it a try. The phone screen is black, don't be in a hurry to restore it first.

Use a friend's mobile phone to call your own **, if you can get through, you can also answer normally. That's basically the problem. Causes and fault analysis of the black screen of the mobile phone, there is no need to panic when the black screen appears, and there is no need to pick the battery immediately.

You can leave the phone for about 3 minutes without pressing any keys on the phone, and then press the button again to activate the screen. After many years of practice. It can generally be returned to normal immediately!

In this way, it basically does not have a big impact on the use.

Grid machine is generally in the mobile phone junk files too much, serious errors can not be recovered or the phone is abnormal, the grid machine will clear all the contents of the C: disk, and then write new system information, so please back up the data and information you need before the machine. There are three types of lattice machines:

1. Soft grid: enter * on the mobile phone, and then ask you to enter the lock code, the initial password is: 12345, if you have changed the mobile phone password, that is the changed password (not the SIM card password), and then a white screen appears, only the word nokia is displayed, and it will be completed after 1-2 minutes, and the mobile phone time will be re-entered after the grid;

2. Hard grid: turn off the computer first, press and hold the dial key, "* key, "3" key while turning on the phone, turn on the power until the word "nokia" appears, this process can not release any button, wait a few seconds until "formatting...... appears", then you can release the button. After 1-2 minutes, the system format is completed, the phone will automatically restart and enter the standby screen, and re-enter the phone time;

Mine is a 6120c, hard-graded twice.

Unplug the memory card and turn it on, it won't always freeze, and when it doesn't freeze, format the phone.

When you're done, format the memory card.

Viruses and everything are floating clouds unless you install NetQin, a virus king.

First of all, it is recommended that you do not send it for repair, depending on your situation, it is not a hardware problem, you can format the phone first, that is, enter* Before entering the password, even if the mobile phone is poisoned, you can also solve it with this method, if it still does not work after following the above operation, then send it to repair, but pay attention to your eyes when repairing, do not take your eyes off the phone, otherwise you know what will happen.