Chapter 5: Troubleshooting; System Limitations - Dell Precision 3460 Small Form Factor Service Manual

System Limitations

This section contains information about some new features and need-to-know information about this computer.
● Modern Standby Limitations
● Thermal pad for solid-state drive
● Intel System Agent Enhanced Speed Step (SAGV) always disabled
● System board TPM settings through BIOS
Modern Standby Limitations
● Legacy PCI cards do not support Modern Standby through TI PCI bridge.
● Enterprise Hard Drives do not support Modern Standby.
● Systems with 2.5-inch/ 3.5-inch Hard drives take longer to enter Modern Standby for the first time. System can enter
Modern Standby normally from the second time onwards.
● Graphics Cards or Add-In Cards not factory installed by Dell may not be Modern Standby compliant and would not allow the
system to enter Modern Standby.
● PSU LED may not turn off sporadically even after system enters Modern Standby
Table 20. System behavior with HDDs/ AICs which do not support Modern Standby
Screen
Expected Off
system
behavior
under
Modern
Standby
Enterprise Off
SATA hard
drive
PCIe AIC Off
not
supporting
ModS
Legacy PCI Off
Card (via TI
Bridge)
NOTE: ModS = Modern Standby
NOTE: PSU = Power Supply Unit
NOTE: CPU = Processor
dGfx fan Hard drive
LED
Off Off
Off Off
Off/On (Up Off/On
to dGfx)
Off/On (Up Off/On
to dGfx)
Troubleshooting
PWR LED PSU LED
Off Off
Off On
Off/On (by On
S/W Drips)
Off/On (by On
S/W Drips)
PSU fan CPU fan
Off Off
On On
On On
On On
Troubleshooting
5
System fan
Off
On
On
On
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