A8Jn 

A8Jn 

Troubleshooting Guide

Troubleshooting Guide

Block Diagram

Block Diagram

AC Mode Adapter Plug In

AC_BAT_SYS

+5VCHG

+5VLCM

+2.5VREF

+3VA
+5VA

Press Power Button

LID_SW#

PWR_SW#_Q

PWR_ON

SUS_ON

+1.5VSUS

+3VO

+12VO

+5VO
+5VO

PM_PWRBTN#  

PM_SUSC#  

Power On Sequence 1

Power On Sequence 1

+12V

+5V
+3V

+1.8VO
+1.5VO
+2.5VO

3V_5V_PWRGD

PM_SUSB#

+12VS

+0.9VS

+5VS
+3VS

+1.5VS

2.5VS

+ATI_VCORE

PWR_OK_VGA

MCH_OK

CPU_VRON 

+VCC_GMCH_CORE

+VCCP

+ VCORE

Power On Sequence 2

Power On Sequence 2

VR_PWRGD

VTT_PWRGD

CLK_EN#

Power On 

Power On 

Sequence

Sequence

3

3

POWER 

SYSTEM

VRM_PWRGD

CLK_EN#

CLK_ICHPCI

CLK_PCIE_ICH/#

CLOCK 

GEN. 

ICS954213

CLK_MCH_BCLK/#

CLK_MCH_3GPLL/#

CLK_CPU_BCLK/#

BUF_PLT_RST#

PLT_RST#

H_CPURST#

1

5

4

3

2

4

4

H_PWRGD

7

Reset IC 

ICH6_PWROK

ATI 

M24/M22

ALVISO 

MCH

KBC 

(M3885XHP)

DOTHAN 

CPU

PCI_RST#

SB

ICH6-M

LV08 

LV08 

LV08 

SW_RST#

MINI-PCI

RICOH 

R5C841

SUPER IO

GIGA LAN

5

5

6

System On Sequence 

System On Sequence 

TSICT Voltage Measure 

TSICT Voltage Measure 

-

-

TOP

TOP

TSICT Voltage Measure 

TSICT Voltage Measure 

-

-

BOTTOM

BOTTOM