Dell Precision 7520 User Manual

Diagnostic LED
This section details the diagnostic features of the battery LED in a notebook.
Instead of beep codes errors are indicated via the bicolor Battery Charge LED. A specic blink pattern is followed by ashing a pattern of
ashes in amber, followed by white. The pattern then repeats.
NOTE: The diagnostic pattern will consist of a two digit number being represented by a rst group of LED blinks (1 through 9) in
amber, followed by a 1.5 second pause with the LED o, and then a second group of LED blinks (1 through 9) in white. This is
then followed by a three second pause, with the LED o, before repeating over again. Each LED blink takes 0.5 seconds.
The system will not shutdown when displaying the Diagnostic Error Codes. Diagnostic Error Codes will always supersede any other use of
the LED. For instance, on Notebooks, battery codes for Low Battery or Battery Failure situations will not be displayed when Diagnostic
Error Codes are being displayed:
Table 3. LED pattern
Blinking pattern Problem Description Suggested Resolution
Amber White
2 1 processor processor failure
2 2 system board, BIOS ROM system board, covers BIOS corruption or ROM error
2 3 memory no memory/no RAM detected
2 4 memory memory failure/RAM failure
2 5 memory invalid memory installed
2 6 system board; chipset system board/ chipset error
2 7 display display failure
3 1 RTC power failure coin-cell battery failure
3 2 PCI/Video PCI/Video card/chip failure
3 3 BIOS recovery 1 recovery image nor found
3 4 BIOS recovery 2 recovery image found but invalid
Battery status lights
If the computer is connected to an electrical outlet, the battery light operates as follows:
Alternately blinking
amber light and
white light
An unauthenticated or unsupported non-Dell AC adapter is attached to your laptop. Re-plug battery connector,
replace battery if the issue reoccurs.
Alternately blinking
amber light with
steady white light
Temporary battery failure with AC adapter present. Re-plug battery connector, replace battery if the issue
reoccurs.
Constantly blinking
amber light
Fatal battery failure with AC adapter present. Fetal battery, replace the battery.
Light o Battery in full charge mode with AC adapter present.
White light on Battery in charge mode with AC adapter present.
84 Troubleshooting

Dell Precision 7520 Specifications

General

Form factor	Clamshell
Product type	Mobile workstation
Product color	Black
Memory slots	4x SO-DIMM
Internal memory	8 GB
Memory clock speed	2400 MHz
Memory form factor	SO-DIMM
Internal memory type	DDR4-SDRAM
Maximum internal memory	64 GB
Memory layout (slots x size)	1 x 8 GB
3D	No
AC adapter included	Yes
HDD speed	7200 RPM
HDD interface	SATA III
Storage media	HDD
Total storage capacity	500 GB
Compatible memory cards	SD, SDHC, SDXC
Number of HDDs installed	1
Display surface	Matt
Display diagonal	15.6 \
Native aspect ratio	16:9
On-board graphics card ID	0x591B
Discrete graphics card model	Not available
On-board graphics card model	Intel® HD Graphics 630
On-board graphics card OpenGL version	4.4
On-board graphics card base frequency	350 MHz
On-board graphics card DirectX version	12.0
On-board graphics card dynamic frequency (max)	1000 MHz
Audio system	MaxxAudio Pro
Speakers manufacturer	Waves
Wi-Fi standards	Wi-Fi 5 (802.11ac)
Ethernet LAN data rates	10, 100, 1000 Mbit/s
ExpressCard slot	-
Charging port type	DC-in jack
USB 2.0 ports quantity	0
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantity	4
Pointing device	Touchpad
Operating system architecture	64-bit
Battery capacity	72 Wh
Number of battery cells	6
AC adapter power	180 W
AC adapter frequency	50 - 60 Hz
AC adapter input voltage	100 - 240 V
AC adapter output current	9.23 A
AC adapter output voltage	19.5 V
Operating shock	140 G
Operating altitude	-15.2 - 3048 m
Non-operating shock	163 G
Operating vibration	0.66 G
Non-operating altitude	-15.2 - 10668 m
Non-operating vibration	1.3 G
Storage temperature (T-T)	-40 - 65 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Bus type	DMI3
Tjunction	100 °C
Processor cache	6 MB
Processor model	i5-7300HQ
System bus rate	8 GT/s
Processor family	Intel® Core™ i5
Processor series	Intel Core i5-700 Desktop Series
Processor codename	Kaby Lake
Processor frequency	2.5 GHz
Configurable TDP-down	35 W
Processor lithography	14 nm
Processor manufacturer	Intel
PCI Express slots version	3.0
Processor boost frequency	3.5 GHz
PCI Express configurations	1x16, 1x8+2x4, 2x8
Thermal Design Power (TDP)	45 W
Maximum number of PCI Express lanes	16
Processor ARK ID	97456
Processor package size	42 x 28 mm
Supported instruction sets	AVX 2.0, SSE4.1, SSE4.2
Intel Identity Protection Technology version	1.00
Intel Stable Image Platform Program (SIPP) version	0.00
Motherboard chipset	Intel® CM238
Sustainability certificates	ENERGY STAR

Weight and Dimensions

Depth	261 mm
Width	378 mm
Weight	2800 g
Height (rear)	33 mm
Height (front)	27.76 mm