Shenzhou Z7-KP7GZ notebook boot display flash screen; Motherboard problem opens drawing positioning to screen display interface signal normal seems 0V And this one is 5V, so after the Q27 in Figure 1 is removed, the power-on test is perfect, and the troubleshooting and maintenance of the bright machine are over
Redmi Note 9 Pro cannot be charged. It is found that The solder tin extruded exists in the charging Current protection tube, and it is broken down. Remove it directly and repair the fault.
Gigabyte B250-HD3 does not have CPU power supply , replace with a new CPU, the fault is removed
Apple MacBook a1466 laptop water damage screen does not display, under the microscope, we found the resistance r7731-pin corrode pad break off. Make up the point, install the resistance, and solve the fault.Normally booting up.
HONOR V40 has no ringing when calling, and there is no sound when playing video. Replace it with a new boost Inductor and repair the fault.
Received a daysky cometnotebookAfter the computer is plugged in, the power indicator flashes. It is suspected that there is a problem with the power supply. The measured voltage has changed from 12v4a to 18V. The power supply is broken.
The main board of OEM all-in-one machine ihm65m,no power on,Repeat welding, PCH, RTC_Rst ා, stable at 2.9v, normal switch.
iPhone 12 restarts repeatedly, it was found that there was a problem with the BTB connector 1 after the c1xt1 was removed and the system was removed.
IQ3X0MS has no display. After replacing R18, VCC 3.3 is generated and vccio VCC comes out.
