MiTAC 7521 PLUS/N User Manual

107

When the power button is pressed, nothing happens, no fan activi

When the power button is pressed, nothing happens, no fan activi

ty is heard and power indicator is not light up

ty is heard and power indicator is not light up

CONTINUE

2. Check the power source

from AC adapter. (PJ501)

PL501
PF501
PC2

PC509   PR15   PR16
PD501   PR14   PD3
PU2       PR13 ……..       

SIGNAL:

PARTS:

ADINP
LEARING

POWER

OK?

END

NO

If “D/VMAIN”

failure.

CHECK: 

PD3,PD4,PL3,PR20,PR21,PQ12,

PU9,PR23,PC58,PC57…….

CHECK : 

PD1,PD2,F2,U32,C247,Q22....

If “VDD5”
failure.

If “VCC_CORE”
(CPUVCC)
failure.

CHECK: 

PL12,PU18,PU12,PU19,PU20,

PU22,PU23,PL11,PD21,PR79,
PR80,PC122,PC119,PC123,….

CHECK : 

PU10,PQ502,PQ503,PQ7,

PQ9,PL504,PD505,PU501,
PD502,PL503,PR1,PL502,
PR3,PD504…….

If  “+S12V, +S5V_P

or +S3V_P” failure.

YES

CHECK: 

PU14,PU4,PU5,PD7,PD8,PD10,

PD11,PD15,PL5,PL6,PR32,PR35
,PR46,PR47,PR41,PR42….

If “1.5V, 1.8V”
Failure.