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Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Address
304 North Cardinal
St. Dorchester Center, MA 02124
Work Hours
Monday to Friday: 7AM - 7PM
Weekend: 10AM - 5PM
Maintenance of ASUS x540up notebook no booting
Machine model: ASUS x540up notebook
Fault phenomenon: notebook no booting
Maintenance process:
A ASUS x540up laptop, the fault is the notebook no booting.
Power on detection standby is 3V 5V, click Switch no power on.After inspection, 3vsus was found_Pwrgd was lowered to 0.4V or so.
Maintenance drawing 1 of ASUS x540up notebook no booting
Check Boardview, connect to these places.When removed to d5804, 3vsus_Pwrgd recovered to 3.3V.
Maintenance drawing 2 of ASUS x540up notebook no booting
It is known that 1.0 vsus is needed first_High level of pwrgd, 3vsus_Pwrgd doesn’t pull down.Trace from pu8302, 12 pin 5V normal, 8 pin en3.3v normal.9 pin top 0V is abnormal. Replace the 620k resistor as 0V, and trace the pull-up 19v without voltage.
ASUS x540up notebook no booting maintenance Figure 3
After running the line, we can see that there is a broken line, but we need to remove the auto power off capacity to make up.Direct Jump wire, power on test,Normally booting up.
no booting ance drawing of ASUS c340x58014