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Typical Fault Diagnosis of AMD Radeon RX Video Card
Typical Fault Diagnosis of AMD Radeon RX Video Card
Category Blog
Redmi XMG1902-BR notebook can’t be repaired without power on
The standby chip is hot, and the short circuit of EC causes LDO 3.3 to be pulled low; Judging from the problem on the EC side, I found that there was a needle attached to 5V, which caused the EC to burn when it was powered on. Pins are broken, and then an EC is changed. The boot is normal, and the fault is eliminated.
HUAWEI Mate 30 can’t be turned on
HUAWEI Mate 30 can't be turned on, the CPU is damaged, and the fault is repaired after redoing the CPU.
Dell G7 7588 notebook cannot be started for repair
Judge whether it is the standby chip or the voltage is pulled down or leaked, and find the same model as the 5V standby chip PU18V00 chip from the new drawing. The problem is still this 11-pin problem. The resistance of 1 pin connection is 47K, and 1.8V normally appears after replacement.
Gigabyte GA-H110M-DS2V power on and power off for quick repair
Gigabyte GA-H110M-DS2V is powered on and powered off quickly, and 2_ Both ends of the 5LEVEL and OBC16 are infinite. OBC15 is not installed directly, and it is OK to turn on the machine.
Xiaomi 11 Youth can’t be turned on
Xiaomi 11 Youth an't start the machine, the CPU is virtually welded, and the fault is repaired after the CPU is redone.
Mine card P106 power supply problem repair
The problem with the power supply of mine card P106 is that the 5V feedback resistor is knocked off, resulting in abnormal feedback. Then the 5V chip generates 12V, which destroys the core power supply composite tube and pex power supply chip.
ASUS X455LD notebook computer usb interface all failed repair
First plug in the USB mouse for testing, and the visual mouse light is not on, which is due to the lack of USB+5V power supply. After the flying line, USB_P1 on the small board is connected to USB_P6；; USB_P2 to USB_P4. The test can identify the use of USB devices. Just give up the function of the camera, but don't have to change the CPU at a high price.
HUAWEI P20 can’t be turned on
Huawei P20 can't start the machine. After dismantling it, it was found that a charging tube was burnt out. After dismantling it, it was replaced with a new charging tube, and the fault was repaired.