no boot no post
TRANSCRIPT
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
PWRGOOD fromon-board regulators
PWRGOOD fromVoltage Regulator
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
PWRGOOD fromon-board regulators
PWRGOOD fromVoltage Regulator
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
Power Up Pre-POST POST Boot
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
Power Up Pre-POST POST Boot
Status: POST FailurePower Led State = Solid GreenBack Panel Leds = Fail Code
Possible Causes:Determine from Fail Code
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
Power Up Pre-POST POST Boot
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
Reserved for future use
MBF Fatal motherboard failure detected
Reserved for future use
PRV Indicates system activity preceding video initialization
CFG System resource configuration
Reserved for future use
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
PWRGOOD fromon-board regulators
PWRGOOD fromVoltage Regulator
Module (VRM)
Flea Power
ONOFF
PowerButton
PS_ON PS_PWRGOOD
SystemPWRGOOD
CPUPWRGOOD
Power Point
Processor
Flash
POSTCODE
Power Up Pre-POST POST Boot