ASUS b75m-Plus motherboard is powered on, and the detection card is plugged in. The reset lamp is always on, and the motherboard is not reset. Replace the triode Q1 and start the machine normally.
The auto power off of Gigabyte ga-h61m-s1 motherboard was turned on irregularly. It was found that it was caused by the pull-up resistance r97 corrode Inveracious Soldering of 5vdull. It turned on normally after replacement.
ASUS h81m-e motherboard switch seconds auto power off, will not automatically switch, run line measurement Measuring diode value to find the fault point, replace the deteriorated resistor, boot normal.
Gigabyte ga-h61m-ds2 motherboard no power on, test circuit, hit diode value, oscillograph to measure waveform, replaced components successfully repaired.
ASUS prime z270-a main board memory, not on the memory alarm, SMBus_After the VSB was started up, the line was damaged.
GALAXY gt720 graphics card started screen is black or frozen, and measured Measuring diode value. It was found that GPU chip was damaged. After replacement, the display was normal.
There is no VCC in the core of iCraft gtx650 graphics card. Replace the core of VCC chip and boot normally.
ASRock Fatal1ty z77 professional motherboard has reset code, procpwrgd line is scratched,Jump wire, boot normal.
Gigabyte ga-b250m-d3h motherboard does not display when it is turned on, vccsa VCC is not normal, replace Short circuit Capacitor, boot normally.
Gigabyte ga-h61m-d1 motherboard switch auto power off,switch again, no CPU VCC, oscillograph waveform test to find the fault point, after replacing the voltage divider resistor, the boot is normal.
