Air vents provide ventilation for your computer. Clogged air vents can cause overheating and can affect your computer's
performance and potentially cause hardware issues. Keep the air vents clear of obstructions and clean them regularly to
prevent the build-up of dust and dirt. For more information about cleaning air vents, search for articles in the Knowledge
Base Resource at www.dell.com/support.
Service Tag
The service tag is a unique alphanumeric identifier that allows Dell service technicians to identify the hardware components in
your computer and access warranty information.
Figure 7. Image: Service Tag location
Battery charge and status light
The following table lists the battery charge and status light behavior of your Precision 3590.
Table 1.
Battery charge and status light behavior
Power Source LED Behavior System Power State Battery Charge Level
AC Adapter Off S0 - S5 Fully Charged
AC Adapter Solid White S0 - S5 < Fully Charged
Battery Off S0 - S5 11-100%
Battery Solid Amber (590+/-3 nm) S0 - S5 < 10%
● S0 (ON) - System is turned on.
● S4 (Hibernate) - The system consumes the least power compared to all other sleep states. The system is almost at an OFF
state, except for a trickle power. The context data is written to a hard drive.
● S5 (OFF) - The system is in a shutdown state.
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