Not sure if this helps, but

Router# show environment

Redundant Power System is not present.

SYS PS1 is present.

Type: AC

AUX (-48V) PS1 is absent.

Fan 1 Normal

Fan 2 Normal

Fan 3 Normal

Fan Speed is Normal

Alert settings:

Intake temperature warning: Enabled, Threshold: 50

Core temperature warning: Enabled, Threshold: 70 (CPU: 95)

Board Temperature: Normal

Internal-ambient temperature = 29, Normal

CPU temperature = 46, Normal

Intake temperature = 31, Normal

Voltage 1(3300) is Normal, Current voltage = 3316 mV

Voltage 2(5150) is Normal, Current voltage = 5210 mV

Voltage 3(2500) is Normal, Current voltage = 2525 mV

Voltage 4(1200) is Normal, Current voltage = 1191 mV

http://www.cisco.com/en/US/docs/routers/access/3800/hardware/installation/guide/38troub.html