Question 2: How to detect whether the screen of the mobile phone is good or bad or the motherboard is broken? Can it be turned on or off? Buckle the battery, then replace it (make sure the battery is charged), and press and hold the power button. Will there be vibration, or wait a few minutes to call this phone with another phone, will there be a reaction? If the motherboard is normal, the phone will definitely ring and the vibration will follow. If there is a response, it is that the screen is broken. If there is no response, it is possible that the motherboard is broken.
Question 3: How to see the quality of the mobile phone motherboard? Let's see if there are any places with black hair and green hair. If not, then turn it on and press turn it on, and it will start well. If it doesn't start, it will be bad ~
Question 4: How to check the quality of the mobile phone motherboard 1 If you can directly observe the motherboard, there is a simple way to see whether the motherboard edge is smooth or rough.
This is related to the manufacturing method of the motherboard, which is somewhat complicated, namely silicon dioxide and sodium hydroxide.
2. If the workmanship is fine, the edge of the board will be smooth, and if the workmanship is rough, it will naturally be rough.
Question 5: How to distinguish the quality of a mobile phone motherboard? Mobile phone for mainboard maintenance. Generally, a new machine will give you a new motherboard. However, if it is an older model, it will be replaced with a good one (that is, someone else broke down and the motherboard was repaired by the manufacturer), and a normal one will be enough. We can't control the maintenance personnel, and if the motherboard is replaced, the earphone interface and the charging data cable interface will be replaced on the motherboard together.
Question 6: How to test the screen quality of a mobile phone without a motherboard? Suggest after-sales inspection. Water entering liquid is a taboo for electronic products. . Just because the screen is not bright doesn't mean that the motherboard is burnt out. Obviously, you have damaged a certain part of the phone and the screen is broken? Send it to repair, unless you can disassemble it yourself.
Question 7: How to judge whether the mobile phone motherboard is good with a multimeter? Generally, it is not necessary to judge whether the whole motherboard is good with a multimeter.
The multimeter can be used to test whether there is a problem with the equipment on the motherboard.
Question 8: How to check the quality of Apple's mobile phone motherboard? If the software fails the test, it means that the host motherboard is faulty or the hardware is defective.
Question 9: How to judge the quality of the motherboard depends on the brand first. There are MSI, ASUS and Gigabyte in the first line. These are generally no problem, the key depends on whether it is an OEM product, such as Qicai, Shuangmin and Sabadac. This kind of products are generally more expensive and affordable. But the overall performance will not be too high.
Secondly, look at the chipset on the motherboard. At present, there are three common chipsets on the desktop. Intel makes its own chipsets, such as P43, P45 and X58. Then AMD (ATI) 770,790, this. While NVIDIA's chipset NVIDIA's chipset mostly integrates graphics cards, supports SLI and supports two CPUs.
Chipsets often determine the performance of the motherboard, which is a bunch of nonsense. Anyway, just remember that the new one is better than the old one
Finally, the price and workmanship, the quality of the motherboard, workmanship is of course important. But the price is also a factor that cannot be ignored. Some motherboards are good, but they are almost sky-high and have no price advantage. Even the best motherboard is just a gimmick.
Work is divided into the following points:
1: Look at several layers of PCB. Of course, the thicker the better, but it can't be said that there are only three or four layers.
2. Look at the power supply system. It depends on how many inductors there are on the motherboard. Nowadays, ferrite inductors are mostly used, which is very easy to count. Of course, you should consider that some motherboards have a memory controller, so the memory controller needs a separate power supply. Each power ferrite inductor will be equipped with MOS tubes and capacitors, depending on the number of MOS tubes and whether the capacitors are all solid or liquid. These are the differences between good and bad workmanship.
3. Look at the cooling system. Generally, the cooling system should not be too large, and the integrated one is the best. The heat dissipation is best near the MOS tube and on the chip of the north-south bridge (P55 has no north bridge).
4. Look at the hardware interface support, including PCI-E port, S-ATA port, disk RAID array, memory port and CPU interface. This is also a very important aspect. For example, Gigabyte now has a P55A-UD3R motherboard that hosts the USB3.0 interface, which will be very helpful for future upgrades.
5. Look at the effect of overclocking support. I won't elaborate on these, because there are too many.
Pure hands, don't say I copied it. ......
Question 10: How to judge the motherboard after changing it? Mine also changed the motherboard. Just make all the functions of the phone work once. Or download the details of a mobile phone to see if the parameters are available. Mine didn't.