Q:The power adapter light turns off after connecting the notebook for a few seconds

1, with a multimeter to check whether the normal socket, the supply voltage is 220V. If the utility voltage is not normal, it is recommended to replace the use of environmental testing. 2, with a multimeter to check the power adapter output voltage and current is consistent with the label. If the gap is very large, and the mains voltage is normal, you can determine the power adapter failure, Need to replace the notebook power adapter. 3, if the above check is normal, remove the laptop battery, do not external adapter. Press and hold the notebook power button 5 seconds to repeat 3 times. After releasing the notebook residual charge, Insert the power adapter separately, power on the test. 4, if the fault remains the same, check the notebook's power interface, whether abnormal. Such as loose or the appearance of damage and so on. 5, the above check are normal, basically can be a preliminary judgment is the notebook motherboard failure. Recommended repair service station.

Q:Samsung r423 laptop power adapter interface model is exactly how many millimeters

Estimated diameter of about 5 mm, no caliper, most of the books are the same thickness of the socket.

Q:Why is the laptop power adapter look so big?

The shape of the adapter is of course to stabilize the voltage, the large voltage into a small voltage, as to why the adapter can stabilize the buck, you can query the relevant knowledge. And three trunks that play the role of security protection. You can go to Baidu look, learn what is FireWire What is the zero line what is the ground line. These are secondary school knowledge.

Q:The computer did not respond, no matter what plug in the power adapter, the battery has no electricity, and suddenly shut down is in my intention to plug in the power when charging a plug in the power of the computer can no longer open the machine

If not over the warranty period to go after the sale, if the insurance to go to the social maintenance point, maintenance costs around 200

Q:Apple laptop power adapter bad how to do it

Fourth, the optional power adapter In the maintenance process, because the current power adapter has been a large number of patch components, once the components out of the problem, the difficulty of maintenance even greater. Power adapter power is also increasing day by day, so the test of electronic components is growing, if the power adapter using the quality of electronic components, however, PCB wiring improper, it is likely to increase the probability of failure. Therefore, the purchase of a good quality power adapter, the stability of the notebook is very helpful.

Q:Recently bought HP's 4416s notebook, but when used to find the power adapter will issue a creak sound, looked at other people's notebooks seem to have no such obvious squeaky. Looked with their own model almost HP notebook, although there are creak of the sound, but it seems not my voice big. Someone explained that this is the current work when the sound or the town ...

If you are buying a new computer, you can find a dealer with an invoice replacement.

Q:Buy a new laptop power adapter input current than the original large, can be used? Other are the same

As long as the output current and the original no problem! ~

Q:The original 65w bad, sometimes with less than 65w, can 90w it?

As long as the interface can, 90w can replace 65w. -------------------------------------- Reference: Power supply voltage, the output current is different, can not be used in the same books. The basic principle is that the large nominal current supply can replace the small nominal current supply. It is estimated that some people would like to think that a large nominal current power will burn books, because the current big thing. Actually how much the current in the case of the same voltage depends on the load, Oh, think of junior high school physics to know. When the books of high-load operation, the current larger, the books into the standby time, the current is smaller, the nominal current power supply has enough current margin. On the contrary, some people use 56w power supply instead of 72w with no problem, because the power adapter is usually designed to leave a certain margin, the load power should be less than the power supply, so this replacement is generally feasible in the general use, But the remaining power supply power margin is very small, once your books received a lot of peripherals, such as two usb hard drive, and then cpu full speed operation, and then a base, the above to drive a full speed to read the disk, plus at the same time To charge the battery, it is estimated that the danger, and at any time to touch your power is not already boiled eggs. So it is best not to use a small current instead of high current power supply.

Q:I read, I changed the adapter will be able to charge the battery, and my adapter can also be charged to other models of the same type of notebook (dell N5110), but their own adapter is not able to charge their own notebook

Three: motherboard failure Motherboard failure caused by the notebook is not charging laptop repair is the most encountered, because it is doing chip-level maintenance, the general power and battery caused by the charge in the hands of the board-level maintenance staff will be resolved, not to our hands. There are two cases of motherboard failure, from simple to difficult is the power port - circuit failure First said the power port, this is relatively simple, the performance is not when the battery is sometimes power-down, charging off the power, with the hand to move the power port can make judgments, there is the interface between the battery and the motherboard Weld can cause no charge failure The Related content: "laptop power port replacement" Then there is a circuit failure. Generally, the charging circuit and the protection isolation circuit are faulty. Such as the common charging IC MAX1772 (Quanta foundry models) ADP3860 (classic IBM models commonly used in the charging chip). In addition to the chip itself is easy to damage, the surrounding circuit damage is also seen. Such as saponins smaller than the regulator diode, in the early maintenance work, there is no circuit and point map, repair this failure is quite time-consuming. There is EC itself and the surrounding circuit failure, EC is the charge of the IC's higher-level circuit, is responsible for opening and closing the charging circuit, do not elaborate here.

Q:My friend came back from the outside without adapter, to take my use, are HP, but different models, this way can you? Will the adapter be damaged?

Basically can be, will not damage the charging adapter, but if the difference between the two charger parameters will be too bad for the battery, will affect the service life. For example, if the two books are equipped with a separate graphics card plug can be used, with a video card charger wattage than the integrated graphics to most of the same wattage and large wattage of the charger with a small wattage Of the books can be.