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Category Blog

Smartphone & Pad Repair Guide

IPhone 7Plus does not turn on (short circuit of power supply of power amplifier)

IPhone 7Plus does not turn on (short circuit of power supply of power amplifier) [Fault model] iPhone 7Plus [Fault phenomenon] No boot. [Maintenance process] I received a machine sent by a customer for repair, the model is iPhone 7Plus, and…

zll
2023-07-20

Laptop Repair Guide

Gigabyte 2080Ti is not displayed (core open signal is not generated)

Gigabyte 2080Ti doesn't display it. After the graphics card is removed, check the resistance of each inductor first. No problem is detected. The current can only be up to 000 mA with the conversion board. This current core is not working, and the voltage is measured when it is powered on ......

zll
2023-07-19

Smartphone & Pad Repair Guide

IPhone 7 restarts (1.8V power supply is pulled down)

IPhone 7, the fault is that the white apple can't restart into the system. When the single board of the machine was powered on, the current triggered the take-off to be normal, and it was restarted at 300mA. I immediately thought of the common fault of the seventh generation, and the bad audio led to the restart of the white apple. However, the specific reasons have to be analyzed in detail, so as to solve the problem, then learn more about it!

zll
2023-07-19

Desktop PC Repair Guide, Laptop Repair Guide

Blue sky motherboard gaijixian maintenance

Blue sky motherboard gaijixian maintenance Motherboard model: NH50DPMB-0D Motherboard failure: the graphics card PEXVDD power supply burned, and the core was taken away. Main board maintenanceProcess: The burnt area is too large, and it can’t be repaired by itself. Communicate…

zll
2023-07-18

Smartphone & Pad Repair Guide

IPhone 11 does not boot (main power supply is short-circuited, U2 is damaged)

A second-repaired iPhone 11 failed to turn on. The second repair machine means that the last one was not repaired, and then it was sent to us for quick repair, which proves that our maintenance master is quite hard-core, so let's see how hard the professional maintenance technology of the maintenance master is!

zll
2023-07-18

Laptop Repair Guide

Lenovo rescuer Y7000P turned on and turned off (lack of single display power supply)

Lenovo rescuer Y7000P, power on and power off after triggering. Generally, when you get a computer, first disassemble the motherboard, and then measure the major inductance resistance of the motherboard to see if there is any unreasonable place for maintenance. Let's take a look at the detailed explanation below for the specific operation!

zll
2023-07-17

Smartphone & Pad Repair Guide

Xiaomi 12 S Ultra bluetooth can’t be opened (WiFi pad drops)

Xiaomi 12 S Ultra Bluetooth can't be turned on. When the motherboard is removed for inspection, it is found that the motherboard has traces of falling. It is speculated that the chip may be dropped. When the WiFi is removed, it is really a pile of points at the bottom corner of the chip. Find the problem, reinstall the WiFi, and then turn on Bluetooth, which can be used normally.

zll
2023-07-17

Laptop Repair Guide

HP TPN-C133notebookNon-startup maintenance

HP TPN-C133notebookNon-startup maintenance “Machine model” HP TPN-C133 【 Fault phenomenon 】 There is standby current, which does not trigger. [Maintenance process] After receiving a machine that is not triggered by HP Light and Shadow Wizard TPN-C133, first remove the motherboard…

zll
2023-07-15

Smartphone & Pad Repair Guide

IPhone 11 white apple does not boot after restarting (middle layer virtual welding)

An iPhone11 white apple doesn't start when it is restarted, which is usually caused by external equipment, system, hard disk and middle layer. We can find out the cause of the failure one by one. Find out the reasons and analyze the specific problems. Please see below for content analysis:

zll
2023-07-15