No Boot No Post

Attendee’s will be able to accurately Attendee’s will be able to accurately identify the differences between no identify the differences between no powerpower,, no post and no video no post and no video

Attendee’s will be able to identify the Attendee’s will be able to identify the stage in which the post process has stage in which the post process has stalled by using both the front and rear stalled by using both the front and rear panel diagnostic leds panel diagnostic leds

Attendee’s will be able to identify and Attendee’s will be able to identify and troubleshoot no power, pre post, post troubleshoot no power, pre post, post and boot issuesand boot issues

Currently No Fault Found On motherboard is Currently No Fault Found On motherboard is running at:running at:

50%50%

Of a random sample of 35 Calls booked with Motherboards for Of a random sample of 35 Calls booked with Motherboards for No Post No Boot with Motherboard fixing the Problem?No Post No Boot with Motherboard fixing the Problem?

11

Definitions & Back Ground - Definitions & Back Ground - 8 series 8 series chipsetchipset

Before You Start - Before You Start - Checklist Checklist Monitor Led’s Monitor Led’s The 4 StagesThe 4 Stages

1.1. No Power No Power 2.2. Pre Post Pre Post 3.3. Post Post 4.4. Boot Boot

Job aid / MatrixJob aid / Matrix Online Tools Online Tools Recap Recap

845 Chipset

Processor(1.6->2.2GHz

L2 Cache:256KB, 512KB)

MCH(Northbridge)

ICH-2(Southbridge)

PC133MHz SDRAM

Front Side Bus = 400MHz(100MHz quad pumped)

VRM

4 USB Ports AudioAC97

IDE Primary

IDE Secondary

NIC

PCI1 PCI2

Ris

er

PCI - 32bit/33MHz

SuperI/O

Flash

Keyboard Mouse FloppyParallel/

Seial

LPC (Low PinCount)

SMBus

AGP4X

PC133MHz SDRAM(32-bit/66MHz)

Power Supply

5V_Aux

3.3V 5V

12V

PowerPoint

ICH

NIC

Front Panel

Power On Signal

Wake On LAN

Only availablewhen System is

switched on

ONOFF

Available from the timethe System is plugged in

Ÿ The 5V_Aux Power line (also know as Flea Power) is a low current line that supplies power to partsof the system once the power cord is plugged in

Ÿ It allows the system to be powered on from a "one touch" switch on the front of the system and tosupport WUoL (Wake Up on LAN)

Ÿ WUoL allows a system that is "off" to be awakened by a signal sent over a network. Flea powerallows the NIC to stay alive listening for he wake up signal. This is why the NIC Leds continue to shownetwork activity even when the system is "off"

Ÿ Flea Power should be removed from the system (i.e. remove power cord) before any parts arereplaced in the system

ControlPanel

ICHPowerSupply

PWRGOOD fromon-board regulators

PWRGOOD fromVoltage Regulator

Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Processor

Flash

POSTCODE

ControlPanel

ICHPowerSupply



Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Status: No PowerPower Led State = OFFBack Panel Leds = OFF

Possible Causes:Power SourcePower Cord

Power SupplyControl Panel

Processor

Flash

POSTCODE

Power Up Pre-POST POST Boot

Status: No PWRGOOD from thePower Supply

Power Led State = Blinking AmberBack Panel Leds = OFF

Possible Causes:Power Supply

Voltage Selector SwitchVRM

System BoardInstalled Components

ControlPanel

ICHPowerSupply



Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Processor

Flash

POSTCODE

Status: Pre-Post FailurePower Led State = Solid Amber

Back Panel Leds = OFFNote: PWRGOOD is ACTIVE

Possible Causes:Processor

VRMSystem Board

Installed Components


ControlPanel

ICHPowerSupply



Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Processor

Flash

POSTCODE


Status: POST FailurePower Led State = Solid GreenBack Panel Leds = Fail Code

Possible Causes:Determine from Fail Code

ControlPanel

ICHPowerSupply



Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Processor

Flash

POSTCODE


Status: Power up OKPower Led State = Solid Green

Back Panel Leds = GGGG

Post:Post: Power on self test is the initial process executed by the system Power on self test is the initial process executed by the system

bios. After the system components are initialized and tested the bios. After the system components are initialized and tested the bios transfers the control over to the operating system on the bios transfers the control over to the operating system on the bootable media bootable media

Initialises the core chipset Initialises the core chipset

Initialises the cpu Initialises the cpu

Initialises the keyboardInitialises the keyboard

Passes control to the os Passes control to the os

Verify good power source / leadVerify good power source / lead Any hard drive activity Any hard drive activity When this happen what has anything When this happen what has anything

changed ie hw added removed machine changed ie hw added removed machine opened?opened?

Any leds power button or rear panel Any leds power button or rear panel Is there any activity from the psu fan Is there any activity from the psu fan Monitor led’s state Monitor led’s state

Check List Check List

Green No Display:Green No Display: Power is good possible video card or cables also machine could be Power is good possible video card or cables also machine could be

in a standby state in a standby state

Amber No Display:Amber No Display: Check cables video card or motherboard also machine could be in Check cables video card or motherboard also machine could be in

standby state standby state

No Led No Display: No Led No Display: Verify with sub monitor and check power source begin Verify with sub monitor and check power source begin

troubleshooting systemtroubleshooting system

Monitor leds are model specific and cannot be over generalisedMonitor leds are model specific and cannot be over generalised

Monitor Leds Monitor Leds

Before a machine can complete the Before a machine can complete the POST process it must power onPOST process it must power on

Components Required for Power Up:Components Required for Power Up:

Power SourcePower Source

Power Cord Power Cord

Power Supply Power Supply

System BoardSystem Board

Control Panel ( only if ac recovery is not on in the bios ) Control Panel ( only if ac recovery is not on in the bios )

Checking Flea power:Checking Flea power:

To check to see if the machine has has power without opening the To check to see if the machine has has power without opening the chassis :chassis :

Power button led Power button led

Network card led’s if connected to a network on all optiplex Network card led’s if connected to a network on all optiplex machines machines

On certain machines (Gx200 Gx300 Gx400 Dim8100 8200) On certain machines (Gx200 Gx300 Gx400 Dim8100 8200)

if the hdd led is on while the power button led is flashing amber if the hdd led is on while the power button led is flashing amber PSU is goodPSU is good

Checking Flea PowerChecking Flea Power flea power is on flea power is on ? – Hard Reset? – Hard Reset

Power Up Power Up

Checking Flea Power:Checking Flea Power:

If the customer is willing to open the machine:If the customer is willing to open the machine:

• There will always be an led on the motherboard There will always be an led on the motherboard

• On all optiplex machines pre Gx150 there will also be a flea light On all optiplex machines pre Gx150 there will also be a flea light on the riser on the riser

Identifying Power Up Problems:Identifying Power Up Problems:

Fan not spinning on Psu Fan not spinning on Psu

Led’s on the monitor Led’s on the monitor

Flashing Amber power button ledFlashing Amber power button led

No power button led No power button led

No led on the board No led on the board

Rear panel leds will not be activated a this stage of the power up Rear panel leds will not be activated a this stage of the power up process as cpu has not been utilised process as cpu has not been utilised

Power LED Back Panel LED

Power Supply Fan

Flea Power LED

Possible Cause

OFF

System not plugged in.

Unplugged from system board.

Wall or power strip outlet

Power Cord

Power Supply

OFF ->

OFF

OFF

Amber

Misaligned Bezel

Control Panel Failure

I/O Panel Failure

Cable from I/O panel to system board

System Board

Power Supply

Power LED Back Panel LED

Power Supply Fan

Flea Power LED

Possible Cause

OFF

Amber

Power Supply

Voltage Selector Switch

Voltage Regulator Module

Blinking Amber

OFF

ON

Amber

System Board Shorted To Ground

A solid green Hard Drive or E-Support LED on the Control Panel may indicate a VRM failure.

The focus at this point is to get the system / power supply to power on even The focus at this point is to get the system / power supply to power on even if the system will not P.O.S.T. or boot.if the system will not P.O.S.T. or boot.

Always verify power source / chord remove all extension leads cables etcAlways verify power source / chord remove all extension leads cables etc Remove all peripherals connected to the external interfaces Remove all peripherals connected to the external interfaces Verify proper alignment of the front bezel (especially Gx150 sfx)Verify proper alignment of the front bezel (especially Gx150 sfx) Check to see if psu spins Check to see if psu spins Reseat psu connections Always reseat cables to and from control and I/o Reseat psu connections Always reseat cables to and from control and I/o

panelpanel Disconnect all drives Disconnect all drives Strip machine down to basic components required for power up and add Strip machine down to basic components required for power up and add

them back one at a time any device could be pulling the psu downthem back one at a time any device could be pulling the psu down Swap out hardware where ever possibleSwap out hardware where ever possible

Pre P.O.S.T. Failures:Pre P.O.S.T. Failures:

The idea of a Pre-P.O.S.T. failure will probably be a new one to The idea of a Pre-P.O.S.T. failure will probably be a new one to many. This simply indicates that the system powered on but has many. This simply indicates that the system powered on but has encountered a failure before it could process the P.O.S.T. code.encountered a failure before it could process the P.O.S.T. code.

Essential Components – Any component required for the system to Essential Components – Any component required for the system to process data at the most basic level. This includes the power process data at the most basic level. This includes the power supply, system board and processor and VRM.supply, system board and processor and VRM.

Non-Essential Components – Anything not required for the system Non-Essential Components – Anything not required for the system to process data at the most basic level. This includes the riser, to process data at the most basic level. This includes the riser, any expansion card, memory modules, drive data cables, drive any expansion card, memory modules, drive data cables, drive power cables, audio and Molex cables, processor fans, and / or power cables, audio and Molex cables, processor fans, and / or system case fans.system case fans.

Required Components Required Components

Power Up Pre-P.O.S.T. P.O.S.T. Boot

Required

Components

Power source

Power Cord

Power Supply

System Board

Control Panel *

I/O Panel *

Processor **

Power Components

VRM

Processor

Front Panel

LED Code

Off (Blank)

Amber Solid Amber

Back Panel

LED Code Off (Blank) *** Off (Blank)

Power LED Back Panel LED Beep Code Possible Cause

Solid Amber

Blank

None

Processor

System Board

Installed Components

Troubleshooting Pre Post Troubleshooting Pre Post

Remove all peripherals connected to external interfaces. This includes Remove all peripherals connected to external interfaces. This includes Keyboards mice network cables parallel serial and usb devicesKeyboards mice network cables parallel serial and usb devices

Reseat Cpu and Vrm (if applicable)Reseat Cpu and Vrm (if applicable)

Remove all non essential components from the system board. This should Remove all non essential components from the system board. This should include all installed memory modules drives and risers and expansion include all installed memory modules drives and risers and expansion

cardscards Remove I/0 panel to system board cable (only if ac recovery is on in theRemove I/0 panel to system board cable (only if ac recovery is on in the bios) bios) Reseat power supply connection to the system boardReseat power supply connection to the system board

Swap remaining components if possible (vrm cpu and psu)Swap remaining components if possible (vrm cpu and psu)

A true No P.O.S.T. issue results when a component or peripheral A true No P.O.S.T. issue results when a component or peripheral fails its P.O.S.T. tests or causes the system to lock up. In these fails its P.O.S.T. tests or causes the system to lock up. In these scenarios it is the technician’s job to identify which component is scenarios it is the technician’s job to identify which component is causing the issue and attempt to resolve the error. The process is causing the issue and attempt to resolve the error. The process is usually made simpler through the use of diagnostic LED codes or usually made simpler through the use of diagnostic LED codes or audible beep codes that indicate the failed component.audible beep codes that indicate the failed component.

The software code that defines and produces the diagnostic back The software code that defines and produces the diagnostic back panel LED patterns and Beep codes is stored in the flash BIOS panel LED patterns and Beep codes is stored in the flash BIOS code and is read as part of the actual P.O.S.T. routine. code and is read as part of the actual P.O.S.T. routine.

The back panel LEDs and system beep codes are used as follows:The back panel LEDs and system beep codes are used as follows:

The actual P.O.S.T. test routines and code is divided into several The actual P.O.S.T. test routines and code is divided into several distinct sections based on the component testeddistinct sections based on the component tested

Each portion of the routine is assigned a back panel LED pattern Each portion of the routine is assigned a back panel LED pattern

and / or beep code. These can be thought of as checkpoints during and / or beep code. These can be thought of as checkpoints during the entire P.O.S.T. routine.the entire P.O.S.T. routine.

As the processor begins executing the actual P.O.S.T. code it As the processor begins executing the actual P.O.S.T. code it displays a back panel LED code to indicate which portion of the displays a back panel LED code to indicate which portion of the routine it is currently executing. For example, while the system is routine it is currently executing. For example, while the system is testing the installed memory the back panel LEDs shows the testing the installed memory the back panel LEDs shows the memory pattern - GGAAmemory pattern - GGAA

Power LED Back Panel LED Beep Code Possible Cause

None

Blank Beep

Code

Check Beep Code.

Troubleshoot indicated component.

None

Check LED Code

Troubleshoot indicated component

Solid

Green

LED Code Beep

Code

Check LED and Beep Code

Troubleshoot indicated component.

Trouble shooting true post failures:Trouble shooting true post failures: Remove all peripherals connected to external interfaces. This includes Remove all peripherals connected to external interfaces. This includes

Keyboards mice network cables parallel serial and usb devicesKeyboards mice network cables parallel serial and usb devices Remove the installed memory modules *Remove the installed memory modules * Remove I/o panel to system board cable Remove I/o panel to system board cable Verify the user is using a know good power source – remove all extension Verify the user is using a know good power source – remove all extension

chords power strips and adapters . Verify correct seating of all componentschords power strips and adapters . Verify correct seating of all components Swap remaining components with know good parts begin with the most likely Swap remaining components with know good parts begin with the most likely

failed part in this case the system board if the system still has no post try a failed part in this case the system board if the system still has no post try a different vrm and cpu different vrm and cpu

* * As one of the first devices tested by the P.O.S.T. routine, this is a simple way to test the functionality of the As one of the first devices tested by the P.O.S.T. routine, this is a simple way to test the functionality of the system board and processor. If the system begins generating memory errors you know that the system system board and processor. If the system begins generating memory errors you know that the system

board and processor is functioning on a basic level. board and processor is functioning on a basic level.

LED Pattern (A B C D)

State Name State Description

Off

Reserved for future use

RCM BIOS checksum failure. Recovery Mode

CPU CPU configuration activity or failure

MEM Memory subsystem configuration activity or failure

PCI PCI device configuration or failure

VID Video subsystem configuration or failure

STO Storage device configuration or failure

USB USB subsystem configuration activity or failure


MBF Fatal motherboard failure detected


PRV Indicates system activity preceding video initialization

CFG System resource configuration


POV System activity subsequent to video initialization

STD End of POST process.

LED Pattern Indicated Failure Power LED : Off HDD LED : Off

System is in a S4 (Hibernate), S5 (Soft-off) or G3 (Mechanical Off) state.

Power LED : Solid Green HDD LED : Off

System is powered on and in the normal operating state (S0).

Power LED : Blinking Green HDD LED : Off

System is in a S1 (Standby) or S3 (Standby) state. This depends on the Suspend Mode setting in System Setup.

Power LED : Blinking Amber HDD LED : Off

Indicates one of the power supply rails is operating outside of its normal range.

Power LED : Solid Amber HDD LED : Off

The power supply is functioning, but the system board is not completing power up.

Once a computer completes the P.O.S.T. routine it hands over Once a computer completes the P.O.S.T. routine it hands over

system control to the installed operating system as it begins the system control to the installed operating system as it begins the ‘boot’ process. ‘boot’ process.

Again, customers and technicians often mistake a system that is Again, customers and technicians often mistake a system that is not booting for a system that is not completing P.O.S.T. This not booting for a system that is not completing P.O.S.T. This distinction can be clarified by looking, again, to the diagnostic distinction can be clarified by looking, again, to the diagnostic LED codes.LED codes.

Power LEDs Back Panel LEDs State

Solid Green

GGGG

System has passed all P.O.S.T. tests and drive detection.

Control handed off to the Operating System.

Blinking Green

GGGG

S1 Sleep State

System has passed all P.O.S.T tests.

Control handed off to the operating system.

Blinking Green

Blank

S3 or S4 Sleep State

System has passed all P.O.S.T. tests.

Control handed off to the Operating System.

Before the system can boot to a drive it first must detect it. The detection Before the system can boot to a drive it first must detect it. The detection process relies on functional hardware as well as proper configuration of process relies on functional hardware as well as proper configuration of the bios set up and drive jumpers and cabling.the bios set up and drive jumpers and cabling.

Verify any error messages Verify any error messages Verify the correct drive is enabled in the bios Verify the correct drive is enabled in the bios Reset Bios to factory defaults Reset Bios to factory defaults Clear Nvram Clear Nvram Reseat both ends of the data cable connection Reseat both ends of the data cable connection Verify that the drive jumpers are set to cable select Verify that the drive jumpers are set to cable select Swap Data cable with know good cable Swap Data cable with know good cable

Hard Drive 90/90 TestHard Drive 90/90 Test

Monitor led codesMonitor led codesMonitor led codes

No boot no post cbtNo boot no post cbt No boot no post cbt

No boot no post guide No boot no post guide No boot no post guide

Ostt Ostt Ostt

What are the basic component requirements for power up / pre What are the basic component requirements for power up / pre post / post?post / post?

If a machine is not displaying any video and emitting beep codes If a machine is not displaying any video and emitting beep codes is it showing No power No post or No Boot is it showing No power No post or No Boot

If a customer reports that they have a solid green power button If a customer reports that they have a solid green power button and not displaying any video led what should you be checking and not displaying any video led what should you be checking nextnext

Customer calls in and says their machine will not turn on, how Customer calls in and says their machine will not turn on, how would you proceed with the call would you proceed with the call

ControlPanel

ICHPowerSupply



Module (VRM)

Flea Power

ONOFF

PowerButton

PS_ON PS_PWRGOOD

SystemPWRGOOD

CPUPWRGOOD

Power Point

Processor

Flash

POSTCODE


Date post:	07-Apr-2015
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