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50QMA
50QMA
N/B Maintenance
N/B Maintenance
When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.
AC
Power
Battery
BATT
BAT_T
BAT_V
BAT_CLK
BAT_DATA
PU3
PL507
PF501
PQ506
PD505
PL508
PD507
PQ503
Where from
power source problem
(first use AC to
power it)?
Check following parts and signals:
Check following parts and signals:
Parts: Signals:
No
Board-level
Troubleshooting
Replace
Motherboard
No Power
Try another known good
battery or AC adapter.
Is the
notebook connected
to power (either AC adaptor
or battery)?
Connect AC adaptor
or battery.
No
Replace the faulty AC
adaptor or battery.
Power
OK?
Yes
Yes
8.1 No Power-1
Parts
PJ701
PL1
PF1
PQ501
PD502
U513
U515
Signals
ADINP
LEARNING
H8_I_LIMIT
SW_VDD3
Parts
Q37
Q50
U11
Signals
+PWR_VDDIN
+DVMAIN
ADINP
LEARNING
I_LIMIT
Main Board
MiTac Secret
Confidential Document