Chapter 1: Product Overview 1-9
Current System
Operation
Suspect
Component
System State Power LED Disk Activity
LED
Corrective Action
‐ OFF
‐ ACPresent
PowerSystem‐ OFF
‐ Notin
Standby
‐ ExternalP/S
ON.
OFF OFF 1. CheckACpowertoP/S
2. CheckP/S
3. Checkconnectionbetween
unitandP/S
4. Checkpowerconnection
fromBackPanelto
Motherboardand
MotherboardtoFrontPanel
5. ReplaceP/S
6. Repl
aceMotherboard
7. ReplaceFrontPanelBoard
Runtime Cooling
Component/
CPU
Over
Temperature
Flashes
red/green,
thensolid
redas
temperature
increases
N/A 1. Checkforblockedcooling
vents
2. Checkforexcessiveambient
temperature
3. Checkcoolingcomponents
POST CPU CPUnot
operating
ON ON 1. Checkforcorrectlyinstalled
CPU
2. ReplaceMotherboard
POST BIOSChip BIOSChecksum
failure
ON Flashing
(4/sec.)
1. PerformBIOScrisisrecover
2. ReplaceBIOSchip
3. ReplaceMotherboard
POST Memory Memoryissue ON Flashing
(1/sec.)
1. Checkforproperlyinstalled
memory
2. Replacememory
3. ReplaceMotherboard
POST Motherboard Nodisplay ON Flashing
(1/4sec.)
1. ReplaceMotherboard
POST ‐ Display
‐ Mother
Board
‐ Peripheral
Stoppedprior
toboot
ON Flashing
(1/8sec.)
NoDisplay:
1. Checkforpowertodisplay
ifnodisplay
2. Checkcableconnection
betweenMotherboardand
display
3. Checkforproperly
functioningdisplay
4. ReplaceMotherboard
DisplayWorking:
1. Usedisplaytodetermine
failurepointviaonscreen
messageandBIOSSetup
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