Repair of GA-F2A58M-DS2 Card 91 without VTT Power Supply

GA-F2A58M-DS2 card 91 without VTT power supply found that the CMOS battery is dead and replaced with a new battery fault. Remove the capacitors next to the battery seat and replace them with good capacitors to run code and light up the fault repair!

Machine board No.:GA-F2A58M-DS2

Fault phenomenon: card 91

Maintenance process:

Repair of GA-F2A58M-DS2 Card 91 without VTT Power Supply Figure 1.

Fault video:http://v.youku.com/v_show/id_XMzY1Njc0NDA1Ng==.html?spm=a2hzp.8244740.0.0

Get the machine, measure the machine card 91, swipe BIOS is no good, change CPU is the same way, finally found that the CMOS battery is dead, change a new batterydiodeIt’s only 1.5V over there.

Repair of GA-F2A58M-DS2 Card 91 without VTT Power Supply Figure 2.

After the diode is rtcvdd. The rtcvdd Short circuit is pulled down. Remove the Capacitor beside the auto power off pool and BTB connector. Finally, remove the pbc2 next to the bridge. Rtcvdd recovers 3.3V. Replace with a good Capacitor, run code lights up and repair the fault!

Repair of GA-F2A58M-DS2 Card 91 without VTT Power Supply Figure 3.