No VCC was found on the main board no power on and rsmrst of MAXSUN ms-n520l. It was found that one of the resistors was damaged. After replacement, it turned on normally.
Lenovo cm3a760me motherboard boot into the system is normal, P port and USB port can not be used, add a 4.7K resistor on the chip, the function is normal.
The IBM x3550 M2 was powered off within 10 seconds of startup, and the fault indicator showed BRD. It was caused by the corrosion of two resistors and one capacitor at the eighth pin of max1917 near the fan port. After replacement, it was turned on normally.
Gigabyte ga-z87p-d3 motherboard no reset,auto power off restart, VCC1_5_The PCH VCC line was disconnected, and it was started up normally after replacement.
Lenovo m3a760m motherboard no booting, the actual fault is that the motherboard does not run out of code and there is no memory VCC. The oscilloscope measures the waveform and finds the fault point. The replaced component turns on normally.
The reset light of Gigabyte f2a85xm-hd3 motherboard does not run out of code. The VCC of each major unit is normal, and there is no vdda 2.5V VCC. Replace the Q62 and start the machine normally.
GeForce gtx750-2gd5 graphics card does not display when it is turned on. Analyze the power management chip up1642p circuit,Jump wire,short-circuit, boot normally.
ASUS p8h61-mlx3 Plus motherboard power on and restart, running line measurement Measuring diode value to find the fault point, replace the resistor, boot normal.
