Suddenly the power light is not on today, please ask the master!

First of all, it may be that the inside of the machine is too dirty, especially the memory. (including power supply) secondly, the power supply is aging (you can change a good power supply to give it a try), the power supply performance is poor, and the socket contact is poor.

Third, change the power cord, try it, there may be a virtual connection or broken wire inside the power cord.

Fourth, there is a problem with the motherboard, which may be a failure of a power supply chip. (You may not be able to repair it yourself, find a professional repair, hehe).

Fifth, all the plug-ins are cleaned up and re-inserted, if not, try to change the slot. (This is also more likely).

Sixth, see if there is a capacitor bulge on the motherboard? If you have one, you can replace it yourself. Hehe.

It could be a problem with the power supply or motherboard. The upstairs is even a motherboard problem. Actually, you are not powered on the motherboard. It may be caused by a humid climate, some poor contacts. It is recommended to try dusting first.

1 Check whether the connection between the power supply and the motherboard is not in good contact.

2 If not, change the power supply to see if the start will not start.

3 If it doesn't start, it's the motherboard's problem, and if it's a U problem, it will also start, but it won't light up.

4 Go to the place where it is repaired and repair.

Mainly check the contact problem of the power cord, the contact problem of the bolt seat, etc

If you are sure that the adapter is good, then the laptop host is broken!

Dear users, hello!

It is recommended that you try the reset operation

1) Unplug the battery and power, and press and hold the power button for 30 seconds. (2) If the built-in battery of the thinkpad cannot be removed, there must be a reset hole, and the external battery generally does not have a reset hole, press (1) to reset the operation. 2

If that doesn't solve the problem, we recommend that you try plugging and unplugging the hard drive and memory.

If it still does not solve your problem, it is recommended that you go to your local Lenovo service station to test the installation, and the service station staff will solve the problem for you.

Hope it can help you and have a happy life!

Hello, may I ask if the power is plugged in, why is the display light not on?

Dear, I'm glad to answer for you: May I ask if the power is plugged in, why is the display light not on? A:

Hello dear: when the light is not on, it is the neutral line that is energized. There are several scenarios:

1. When this phase is used, the neutral line will generate induced electricity, which is normal. 2. If no electrical appliances are used, there may be a broken circuit in the neutral line of this phase wire. There is also a short circuit.

Before you can fix it, you need to make sure it's like this. 3. After removing the battery, check whether the computer can run in a power-on environment. If it is, the LED's power indicator is disconnected.

If it doesn't work, the computer adapter may get damaged. If it doesn't work, the computer adapter may get damaged. 4. You should belong to the zero line.

There is an open circuit, and a short circuit will trip. If the socket is not charging, it means that it is not inducing current. Only the zero line is broken.

Check the line in this direction. If you have any questions, you can give me feedback in time! I hope my reply can help you, if you have any follow-up questions, please feel free to inquire about Annihilation, and I will reply to you as soon as possible.

The causes of the failure are: the power supply line is broken or the iron is taken before the light switch; The fuse in the line trips or burns out; Poor contact or non-closure of the bimetal contacts of the light switch or damage to the light switch; After a certain gear of the light switch is turned on, some lamp lines are connected to the iron, causing the bimetal contacts to open. Further further information is available below

1. Press the horn or toggle the signal light switch test: if the horn sounds and the turn signal light is on, it means that the power supply line in front of the fuse is good, so the wire can be used to test the fire or the power short-circuit method to check whether there is a broken circuit in the order of the ammeter wiring note, ignition switch binding post, lamp switch binding post, etc. If the line connection is good, the light switch may be damaged.

2. Try to press the horn without sounding the fuse and not tripping: it means that the power supply line in front of the fuse is broken somewhere or the wiring is poor. If the fuse trips, it means that the fuse is connected somewhere in the line after the fuse.

You can remove the horn, turn signal, power cord and then press the fuse button for testing. If it no longer trips, the light is also on after the light switch, which means that the place where the iron is taken is in the horn or turn signal line. If the fuse is still tripped, the power supply can be shorted to find out the tie-up in order.

3. The light switch power supply binding post has a good fire test: when the light switch is turned on in a certain gear, the phenomenon that the bimetal contact is often opened, and the lamp does not light up, which means that the light line is ironed somewhere. 4. Night driving:

Suddenly, all lights go out, in this case, you should stop immediately, honk the test, if the horn sounds, the power supply is still good, and you should still find out whether the light line has an iron or a broken circuit in order. If the horn does not sound, it may be caused by vibration during driving, the power cord falls off and is broken. You can first check whether the battery binding posts are in good condition, and then search for them in order.

The power supply and indicator lights are normal, but they just don't work.

Hello, the power supply and indicator lights are normal, but the non-working is the reason for the failure of the charging interface. 2 reasons 1, if it is not powered at all. It's completely a power supply problem, change a good power supply 2, and then there is a problem with the computer motherboard No power.

Most of them are motherboard power supply chip problems! There are also several reasons why the patches around the South Bridge burn you. 1. The power adapter is damaged.

Judging method, if other people have another charger universal, replace someone else's charger and plug it into the computer to see if there is a response, if the charger itself has an indicator light, see if the indicator light is on, not on, the charger is damaged. If the charger is normal after replacement, then it is the original car of the charger. 2. The charging port is damaged.

That is, the charging adapter is still unusable, and the light degree of playfulness can be this problem, and you can't solve it yourself for the time being, so send it for repair. This repair cost is relatively low. About 200 outside the retention period, the official should get it for you.

3. Another reason for the above paragraph is that the entire motherboard may be scrapped, and you can't solve it yourself for the time being, so send it for repair. This repair cost is relatively high. The repair cost is estimated to be replaced with a new one with a little more money.

This situation will not be a problem with the battery, because even if the battery is removed and the power supply is connected, the computer base can be used normally.

1. Circuit fuse or wiring failure, mainly to check the problem of poor contact, such as electric door, lack of travel connector, etc., 2, turn the handle of the volt stool failure, red line (brown line) 5V, green spike line 3 4V can change with rotation, 3, controller problem, replacement test, 4, Hall off, damage, motor phase loss, 5, mechanical failure, stuck, bearing broken, etc., 6, the battery is insufficient, or there is individual damage, support the rear wheel, twist the handle to the end (the fastest speed of the motor), measure the voltage of each batteryIf the voltage is particularly low, it is bad.

The power indicator light is on but not the cherry code to turn your dear,Obviously,You are caused by too high temperature,You should check the heat dissipation of the CPU and graphics card,Poor contact and so on,There is dust to clean。 Hope it helps. If my answer is helpful to you, please give a thumbs up (comment in the lower left corner), look forward to your like, your spine is very important to me, and your support is also the driving force for my progress.

Finally, I wish you good health and a happy mood!

What happens if the power supply doesn't turn on? The causes of the failure are: the power supply line is broken or the iron is taken before the light switch; The fuse in the line trips or burns out; Poor contact or non-closure of the bimetal contacts of the light switch or damage to the light switch; After a certain gear of the light switch is turned on, some lamp lines are connected to the iron, causing the bimetal contacts to open.

More extended information is as follows: 1. Press the horn or toggle the signal light switch test: if the horn sounds and the turn signal light is on, it means that the power supply line in front of the fuse is good, so the wire test or power short-circuit method can be used to check whether there is a broken circuit in order for the ammeter wiring note, ignition switch binding post, lamp switch binding post, etc.

If the line connection is good, the light switch may be damaged. 2. Try to press the horn without sounding the fuse and not tripping: it means that the power supply line in front of the fuse is broken somewhere or the wiring is poor.

If the fuse trips, it means that the fuse is connected somewhere in the line after the fuse. You can remove the horn, turn signal, power cord and then press the fuse button for testing. If it no longer trips, the light is also on after the light switch, which means that the place where the iron is taken is in the horn or turn signal line.

If the fuse is still tripped, the power supply can be shorted to find out the tie-up in order. 3. The light switch power supply binding post has a good fire test: when the light switch is turned on in a certain gear, the phenomenon that the bimetal contact is often opened, and the lamp does not light up, which means that the light line is ironed somewhere.

4. Night driving: suddenly all the lights go out, in this case, you should stop immediately, press the horn test, if the horn sounds, the power supply is still good, and you should still find out whether the lamp line has an iron or a broken circuit in order. If the horn does not sound, it may be caused by vibration during driving, the power cord falls off and is broken.

You can first check whether the battery binding posts are in good condition, and then search for them in order. @2019