No Power, +1.25VSREFMEM | MiTAC 8355 specs

8355 N/B MAINTENANCE

8.1 No Power

When the power button is pressed, nothing happens, no fan activity is heard and power indicator is not light up.

Note:

PU506

P29

PL512

P25

PL513

+1.5V_M9

VGA_1.2/1.0

P24

: Page 24 on circuit diagram.

PU16

P28

JL520

P25

P26

P3

PU19

PU18

JL521

U27

U7

+5VS_P

+5V

+2.5VDDA_RUN

PU502 : Through by part PU502.

+5VS

L534

P21

U515

P20

L54

P3

+AGP_5V

VA

R619

+2.5VDDA

L517

P22

P15

R627

+5V_TP

+5V_HDD

PU15

JL518

P28

P25

R136

PU17

JL519

R615

P15

+3VS_P

+3VS

PGDN

+5V_CD

PU502

R53

P2

R57

PL1

PQ2

PU505

+1.25VSREF_CLAW

P30

P31

P30

PU507

P32

Power In

PL2

PQ3

PD1

PU508

R525

ADINP

D_VMAIN

VCC_CORE

P2

PJ501

PL3

R612

PL10

+1.25VSREF_MEM

PF1

PU11

PU6

P27

JL522

P25

PQ12

+1.25VS_P

+1.25VTT

P26

PU9

U504

+2.5V

PU10

Charge

PU504

JL515

PU4

P27

JL516

PQ10,PQ11

PU7

P25

P29

P8

Battery

PU5

JL517

U526

L516

+2.5VS_P

+2.5VS_DIMM

+2.5V_M10

Discharge

VDD_DAC2.5

P31

L512

P8

PD3

VDD_PNLIO2.5

Q517

Q31

P26

+5VS

VDD5S

L521

P8

VDD_MCLK2.5

F503

P30

P26

Q32

P26

P26

L520

PD5

U508

U519

P8

+VMAIN_2951

H8_AVREF1

VDD5

VCC_RTC

L549

VDD_MEM_IO

122

Image 123

MiTAC 8355 service manual No Power, +1.25VSREFMEM

Contents

8355 Contents 8355 N/B Maintenance Trouble Shooting ……………………………………………………………………………………… Audio Failure ………….…………………………………………………………………………………………… Introduction Hardware Engineering Specification 8355 N/B Maintenance CPU System Hardware Part Integrated Memory Controller CPU ClawHammer ProcessorCompatible with Existing 32-bit Code Base AMD x86-64 Technology Way Associative ECC-Protected L2 Cache Power ManagementHyperTransport. Technology to I/O Devices Kbyte 2-way Associative ECC-Protected L1 Data Cache Power Supplies Electrical InterfacesPackaging Recommended Application System frequencySystem frequency synthesizerICS950402 Programmable Timing Control Hub AMD-K8 processor Features VIA K8T800+VT8235 3.1 K8T800High Performance K8 CPU Interface Full Featured Accelerated Graphics Port AGP 8x Controller 8355 N/B Maintenance 3.2 VT8235 8355 N/B Maintenance Smartshader Advanced Shader Technology General Description Dual Display Support High Performance Memory Support Ideal for Windows 2000 and Windows XP General and Interfacing Features 8355 N/B Maintenance 8355 N/B Maintenance 5 AC’97 Audio System C-MEDIA Electronics INC., CMI9738-S 8355 N/B Maintenance MDC PCTel Modem Daughter Card PCT2303W Compatibility Operating System Compatibility Modulation DTE interface Dtmf Tone Frequency Error CorrectionDtmf signal level Data Compression High group 10+/-2dBm Low group 12+/-2dBm Transmit Level 7 VT6307L PCI 1394a Integrated Host Controller OverviewIntegrated 400 Mbit 2-Port PHY 8355 N/B Maintenance Embedded CONTROLLER-H8 Main Features Timer MemoryInterface Ports Converter Wait control Power-down modesOther features Interrupts Features System Flash Memory Bios Memory System64MB, 128MB, 256MB, 512MB x64 200-Pin DDR Sdram SODIMMs 11 VT6103 Fast Ethernet 10/100 1-PORT PHY/TRANSCEIVER 3V operation with 5V tolerant Cardbus/MediaReader Controller Pin Lqfp / 209-ball Lfbga package for CB710 PCI Interface CardBus InterfaceSmart Card Interface Memory Stick Interface Secure Digital Interface SmartMedia Interface Interrupt configurationPower Management Control Logic Stick interface Misc Control Logic Supports Zoomed Video port Power Switch Interface Outstanding Features SuperI/O-PC87393General Description 8355 N/B Maintenance Keys Feature Meaning Combination Other FunctionsHot Key Function Acpi mode Power ON/OFF/Suspend/Resume ButtonCover Switch APM mode Fan power on/off management LED Indicators 7 I/O Port Cmos Battery Mini PCI type III BBattery current limit and learning ROM Drive Peripheral Components Doze Mode Power ManagementSystem Management Mode Full on mode Suspend to HDD Suspend to Dram HDD & Video Access Other Power Management Functions Appendix 1 VT 8235 Gpio Definition To the previous table Shadowed block is the selected function Appendix 2 H8 Pins Definition Charging KB OUT8 Ilimit ↑ Pull High ↓ Pull Low →3V Level shift CPU Appendix 3 8355 product spec AC adapter FCC, CE, UL, TUV, CB, Bsmi Left-side View System View and DisassemblySystem View Front View Rear View Right-side View Top View Bottom View System Disassembly DDR Sdram Battery Pack DisassemblyReassembly Remove three screws Keyboard Slide out the keyboard cover Disconnect the cable from system board. Figure Remove four screws 3 CPU Disconnect the fan’s cord 11 Remove HDD compartment HDD Module 13 slide out the hard disk drive 15 Remove the CD/DVD -ROM drive 5 CD/DVD-ROM Drive 16 Remove the SO-DIMM SO-DIMM 17 Remove two screws LCD Assembly 19 Remove the hinge cover 21 Remove the LCD assembly 22 Unscrew four screws Inverter Board 8355 N/B Maintenance 24 Separate the LCD panel LCD Panel 8355 N/B Maintenance 26 Unscrew nine screws System Board 28 Remove the top cover Unscrew one screw and disconnect fan’s cord. Figure Reassembly 32 Remove the modem card Modem Card 33 Free the touch pad Touch Pad 8355 N/B Maintenance Main Board Side a Definition & Location of Connectors / Switches VR1 Volume Controller Definition & Location of Connectors/ Switches Main Board Side B Definition & Location of Major Components U517 TPA0202 Audio Amplifier U518 CMI9738 Audio Codec DDR Sdram Memory Interface Continue Pin Descriptions of Major ComponentsAMD Athlontm 64 Processor-1 DDR Sdram Memory Interface Miscellaneous AMD Athlontm 64 Processor-2HyperTransport Technology Debug K8T800MVT8385 North Bridge-1 Hyper Transport transmit InterfaceHyper Transport Receive Interface AGP Bus Interface K8T800MVT8385 North Bridge-2Hyper Transport Control Link Interface Girdy GIRDY# K8T800MVT8385 North Bridge-3 K8T800MVT8385 North Bridge-4 Clock, Reset, Power Control and Test VT8235 South Bridge-1 Advanced Programmable Interrupt Controller APICInterfaceStraps CPU Interface VT8235 South Bridge-2CPU Speed Control Interface Low Pin Count LPCInterface VT8235 South Bridge-3 PCI Bus InterfacePCI Bus Interface Continue Universal Serial Bus 2.0 Interface VT8235 South Bridge-4LAN Controller -Media Independent Interface MII General Purpose I/O Serial IRQ VT8235 South Bridge-5UltraDMA-133 /100 /66 /33 Enhanced IDE Interface UltraDMA-133 /100 /66 /33 Enhanced IDE Interface Continue General Purpose Inputs Continue Resets,Clocks,and Power StatusVT8235 South Bridge-6 General Purpose Inputs Power Management and Event Detection Power Management and Event Detection ContinueVT8235 South Bridge-7 AC97 Audio /Modem Interface Power and GroundVT8235 South Bridge-8 Internal Keyboard Controller System Management Bus SMBInterface I 2 CBus Power and Ground ContinueISA Subset /Parallel Bios ROM Interface VT8235 South Bridge-9 System Block Diagram U503U506 Maintenance Diagnostics Code Post Routine Description Error Codes 118 Debug Tool Diagnostic Tool for Mini PCI Slot Diagnostic Tool for PIO Port Trouble Shooting +1.25VSREFMEM No Power +1.2VLDTA Agpvddq PJ502 No power Adinp Battery Can not Be Charged Battery can not Charge System Clock Check No Display No Display System Failure Reset Circuit Checking1 No Display System Failure Reset Circuit Checking2 No Display Parts Signals U9 P6 AGP Controller Failure LCD No Display Charge BD J2,J3 are cold colder? AGP Controller Failure J503 External Monitor No Display Display Yes OK? Replace faulty monitor Symptom The extend DDR RAM is failure or system hangs up Memory Test Error Parts Memory Test Error Key Board Controller Keyboard K/B Touch-Pad T/P Test Error Test Yes Ok? Replace the faulty Keyboard or Touch-Pad Keyboard or Touch-Pad Test Error Hard Disk Driver Test Error Hard Driver Test Error Hard Disk Driver Test Error J530 CD-ROM Driver Test Error CD-ROM Driver Test Error Symptom An error occurs when a USB I/O device is installed USB Test Error U501 PartsSignals USB Test Error PC-Card Socket Failure Symptom An error occurs when a PC card device is installed PC Card Test Error Memory-Card Socket Failure Memory-Card Socket Failure Memory Card Test Error Symptom An error occurs when IEEE1394 device is installed IEEE1394 Test Error Test Error Symptom An error occurs when LAN device is installed LAN Test Error Correct it LAN Test Error Input Of Audio Subsystem Audio Failure Output Of Audio Subsystem Audio Drive Failure Part Number Description LocationS Spare Part List-1 Spare Part List-2 CFM-BATFUSE Thermal 98C Spare Part List-3 DIODEBAV70LT1,70V,225MW,SOT-23 Spare Part List-4 DVD Combo DRIVE8X24X10X24X,SBW Spare Part List-5 ICEM6A9320BI-3.6M,DDR SDRAM,4MX Spare Part List-6 ICVT8235,SOUTH BRIDGE,BGA,487P Spare Part List-7 Spare Part List-8 LABELSOFTWARE,INSYDE BIOS-M RELAYREED,200V,.5A,NORMAL Open SW1 Spare Part List-9 RES2M Spare Part List-10 RP7,RP8 Spare Part List-11 RP6,RP9 Spare Part List-12 TRANSDTC144WK,NPN,SOT-23,SMT Spare Part List-13 Spare Part List-14 WIRE#28,UL1061,40MM,BLUE,PRCPage Page Model Corefbh CPURESET# CPURESET# 3,12 DDRRASB#Memresetl CPURESET# VID2 NBLDTRST# CPURESET#VID0 VID1 DIMM-SLOT & Termination K8T400M- VT8385 H8RESET# BATTG# FS0 14MSBIOSCH8RESET# ACPOWER# M10GPIO5 AGPRESET#M10GPIO0 M10GPIO4 ATI M10-P2/4 VMDA0 MEMAMD0 MEMAMD2MEMAMA2 MEMAMD0 VMA2 VMA0VMDA0 VMA0 VMB0 VMDB0 VMDB32 VMA1 VMDA1 VMDA33 PANELID0 PANELID2 PANELID3 CrtinCrtgreen +PANELVDD VT8235 1/3- PCI & USB VT8235 2/3- IDE & AC97 VT8235 3/3- VLINK&LAN HDPDD3 IDEDPDD3 HDPDD4 IDEDPDD0IDEDPDD1 HDPDD2 IDEDPDD2 CAD2 CAD11 CVS1 CARDRESET#POWERONRESET# CAD1 SDWP# SDDATA1 LEDCL190 SDDATA0 Sdclk Sdcmd SDDATA3 SDDATA2 MINIPCIGPORESET#Wirelesspd SDCD# GND SDWP# TPB0P PCIAD4 PCIAD1TPA0N TPA0P LANTX+ LANPHYRESET#LANMRXDV2 PJTX+ AC97SDIND0 Avdd MicvrefMicint Micext AC97SDOUT Spdifout Audiomute AmpmuteDEVICEDECT# DECTHP#/OPT PIOD/INT# LPCSPIORESET# PD6LPCSPIORESET# LPCFRAME# INIT# SCI#/FANSWITCH Tclkd H8RESET#SCI#/FANSWITCH H8WAKEUP# H8ENABKL H8RESET# USBP2P USBOC0# USBOC2#USBOC5# USBOC2# USBP0P SD6 SA6 SA0 SD1 SA1SD2 SA2 PCIGNT#4 SD3 SA3 PCIGNT#5 PCICARDBUSGNT#0 SD4 SA4 PWRONM9 OD3OD5 Pgvcccore +2.5VS&+1.25VS&+1.8V&+1.2V VOSENSE2 +3VS / +5VSDVMAINP2 VOSENSE1 For M10 +1.2V&+1.0V Ilimit AdinpADP1 Batt Battdead Adinp BattLiovp Liovp Charging PVID2 VMAINP3PVID0 PVID1 Reference Material Tel Fax Second Edition Nov Mail Willy .Chen @ mic.com.tw