The black screen of the Yingchi GT630 does not display, and the NPN triode for power supply control is defective. After replacing the triode, all power supplies will normally generate a light.
Yingtai B85 motherboard does not light up, and the system lights up successfully after brushing BIOS.
The Sapphire PT-F2A85M-MA motherboard is powered down irregularly. Enter BIOSS and adjust the default voltage 1.4 to about 1.25. Find the H/W monitoring panel and turn on the CUP temperature protection.
The Xiaoyingba GTS450 does not display. When the RT9259A is replaced, the video memory resistor and VCC-PLL voltage are out. A BIOS is replaced, the first and second video memories are soldered, and the fault is still present. Replace a row of 0.1UF capacitors of Golden Finger, and the fault is contacted.
Gigabyte GA-B150M-EVO has no memory power supply. It is normal to replace a resistor.
Gigabyte GA-H81M-DS2-T triggered the power failure, and the WR66 resistance was severely corroded. After the resistance was replaced, the fault was removed.
ASUS H110M-F 1.01 VPPDDR does not light up, replace the chip, remove PU502 and PL502, and solder 1117.
ASUS B85-PRO GAMER has reset without code running, short circuit the C and E poles of SQ35, reset the PWROK signal of the bridge, and replace the SQ35 with code running light.
The ASUS B85M-F fan is always running, the light is not lit, the BIOS is brushed, the PQ804 is removed and replaced with a new one, but the fault is still the same, so the PQ801 is removed and connected to the PQ800 through a 10K resistor, and the PQ800 is replaced with a new one, and the fault returns to normal.