Acer Aspire 7720 User Manual

84 Chapter 4
Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Symptom / Error Action in Sequence
LCD backlight doesn't work
LCD is too dark
LCD brightness cannot be adjusted
LCD contrast cannot be adjusted
Enter BIOS Utility to execute “Load Setup Default Settings”, then
reboot system.
Reconnect the LCD connectors.
Keyboard (if contrast and brightness function key doesn't work).
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
Unreadable LCD screen
Missing pels in characters
Abnormal screen
Wrong color displayed
Reconnect the LCD connector
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
LCD has extra horizontal or vertical lines
displayed.
LCD inverter ID
LCD inverter
LCD cable
LCD
System board
Indicator-Related Symptoms
Symptom / Error Action in Sequence
Indicator incorrectly remains off or on, but system
runs correctly
Reconnect the inverter board
Inverter board
System board
Power-Related Symptoms
Symptom / Error Action in Sequence
Power shuts down during operation Power source (battery pack and power adapter). See “Power
System Check” on page 73.
Battery pack
Power adapter
Hard drive & battery connection board
System board
The system doesn’t power-on. Power source (battery pack and power adapter). See “Power
System Check” on page 73.
Battery pack
Power adapter
Hard drive & battery connection board
System board
The system doesn’t power-off. Power source (battery pack and power adapter). See “Power
System Check” on page 73.
Hold and press the power switch for more than 4 seconds.
System board

Acer Aspire 7720 Specifications

General

Stepping	M0
Tjunction	85 °C
Processor cache	2 MB
Processor cores	2
Processor model	T5750
System bus rate	- GT/s
Processor family	Intel® Core™2 Duo
Processor series	Intel Core 2 Duo T5000 Series
Processor socket	mPGA4
Processing Die size	143 mm²
Processor frequency	2 GHz
Processor cache type	L2
Processor lithography	65 nm
Processor manufacturer	Intel
Processor front side bus	667 MHz
Processor operating modes	64-bit
Thermal Design Power (TDP)	35 W
Number of Processing Die Transistors	291 M
HDD speed	5400 RPM
HDD interface	SATA
Card reader integrated	Yes
Total storage capacity	250 GB
Compatible memory cards	MMC, MS PRO, SD, xD
Display surface	Matt
Display diagonal	17 \
Display brightness	200 cd/m²
Display resolution	1440 x 900 pixels
Native aspect ratio	16:10
TV-in port	No
Modem speed	56 Kbit/s
Wireless technology	IEEE 802.11a/g/n
Memory slots	2x SO-DIMM
Internal memory	4 GB
Internal memory type	DDR2-SDRAM
Memory layout (slots x size)	2 x 2 GB
Discrete graphics card model	Intel® GMA X3100
Maximum graphics card memory	0.358 GB
Audio system	High Definition Audio
Front camera resolution (numeric)	0.3 MP
Networking features	Gigabit Ethernet
Operating system installed	Windows Vista Home Premium
TV-out type	S-Video
Charging port type	DC-in jack
Serial ports quantity	0
USB 2.0 ports quantity	4
Cable lock slot type	Kensington
Password protection type	BIOS
Battery life (max)	3.5 h
Number of battery cells	8
Pointing device	Touchpad
Processor code	SLA4D
Processor ARK ID	33915
Processor package size	35 x 35 mm

Weight and Dimensions

Depth	298 mm
Width	404 mm
Weight	3620 g
Height (rear)	43 mm
Height (front)	38 mm