Acer Travelmate 7720 Service Guide

Chapter 4121
The system doesnt resume from 
hibernation mode.See “Save to Disk (S4)” on page 39.
Hard disk connection board
Hard disk drive
System board
The system doesnt resume from standby 
mode after opening the LCD.See “Save to Disk (S4)” on page 39.
LCD cover switch
System board
Battery fuel gauge in Windows doesn’t go 
higher than 90%. Remove battery pack and let it cool for 2 hours.
Refresh battery (continue use battery until power off, then 
charge battery).
Battery pack
System board
System hangs...

122Chapter 4
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 124. Touchpad does not work. Reconnect touchpad cable.
Touchpad board
System board
Modem-Related Symptoms
Symptom / ErrorAction in Sequence
Internal modem does not work correctly. Modem phone port
modem combo board
System board Keyboard/Touchpad-Related Symptoms
Symptom / ErrorAction in Sequence
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Chapter 4123
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a 
hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement 
should be considered only when a recurring problem exists.
When analyzing an intermittent problem, do the following:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any...

124Chapter 4
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
whether a short circuit is suspected, or whether the system is inoperative. 
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE: Verify that all attached devices are supported by the computer.
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power 
System Check” on...

Chapter 5125
Top View
No.DescriptionNo.Description
1 Power Cable Connector  5 Fingerprint/Touchpad 
Connector
2 LCD Cable Connector 6 Bluetooth Connector
3 Touchpad Board Connector 7 Speaker Connector
4 Keyboard Connector
Jumper and Connector Locations
Chapter 5
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126Chapter 5
Bottom View
No.DescriptionNo.Description
1CPU 7USB Connector
2 SATA Connector 8 Card Reader 
3 PC Card Reader 9 Line-out jack
4 LAN Connector 10 Mic-in jack
5 CRT Connector 11 Headphone jack
6 1394 Connector
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Chapter 5127
Standard Operation Procedures of Password Bypassing and BIOS Recovery
For RD and CSD to debug easily, the system provide one hardware DIP switch for Bypassing Password 
Check, and one Hotkey to enable BIOS Recovery.
1.DIP Switches: 
2.Hotkey to enable BIOS Recovery: Fn+ESC, then Power Button. To use this function, it is strongly 
recommended that the AC adapter is connected to the system and plug-in to a wall outlet and the Battery 
is also in the system
Bypassing Password Check (SW1): If...

128Chapter 5
special BIOS block, called BootBlock. RD/CSD can use this special BIOS code to recover the BIOS to a 
successful one if previous BIOS flashing process fails. However, before doing this, one Crisis Disk should be 
prepared in WinXP. Detailed steps are as the followings:
a.Prepare the Crisis Disk in WinXP.
b.Insert the Crisis Disk to a USB floppy drive which is attached to the failed machine.
c.While the system is turned off, press and hold Fn+ESC, then press Power Button. The system 
should...

Chapter 6129
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of TravelMate 5710/5310 and 
Extensa 5610/5210. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise 
Authorization).
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your 
regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service 
Guide. For ACER...

130Chapter 6
TravelMate 7720/7320 Exploded Diagram
TravelMate 7720/7320 FRU List
CategoryNo.Part Name and DescriptionAcer Part No.
Adapter
ADAPTER 90W DELTA ADP-90SB 
BBDARAP.09001.010
ADAPTER 90W DELTA ADP-90SB 
BBEA LFAP.09001.013
ADAPTER 90W LITEON PA-1900-
04WRAP.09003.005
ADAPTER 90W LITEON PA-1900-
24ARAP.09003.011
Battery-
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