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Undetermined problems are those for which diagnostic tests cannot identify the cause. This may be a failure to
detemine which adapter or device failed, which installed device is malfunctioning, a short circuit is suspected,
or when the system is inoperative.
IMPORTANT: Verify that all attached devices are supported by the computer, and that power supply to the
computer is good.
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
1.Shut down the computer.
2.Visually check the failing FRU for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all the following devices:
t Non-Acer devices
t Printer, mouse, and other external devices
t Battery pack
t Hard disk drive
t Optical drive/diskette drive
t Cards in the ExpressCard/54 and card reader slots
4.Power on the computer.
5.Determine if the problem has changed.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
7.If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
t System board
t LCD module assembly
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Online Support Information
This section describes online technical support services available to help you repair your TravelMate
If you are a distributor, dealer, ASP or TPM, please refer your technical queries to your local Acer branch
office. Acer Branch Offices and Regional Business Units may access our website at http://global.acer.com/
support/index. However some information sources will require a user ID and password. These can be obtained
directly from Acer CSD Taiwan.
Acer's Website offers you convenient and valuable support resources whenever you need them.
In the Support & Downloads
tab you can download information materials for all of Acer notebook, desktop and
server models including:
TService guides for all models
TSpare parts lists
TTechnical Announcement Bulletins (TABs)
For these purposes, we have included an Acrobat File to facilitate a hassle-free downloading of our technical
The following are also available in the Support & Downloads
TDetailed information on Acer's International Traveler's Warranty (ITW)
TReturned material authorization procedures
TAn overview of all the support services we offer, accompanied by a list of telephone, fax, and email
contacts for all your technical queries.
We are always looking for ways to optimize and improve our services, so if you have any suggestions or
comments, please do not hesitate to communicate these to us.
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System Block Diagram
System Block Diagram and Board Layout
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System Board Layout
This section shows the top and bottom layout of the TravelMate 4520 system board.
1 LCD1 LCD-CCD cable connector
2 LID1 Notebook lid connector
3 CN1 PC card slot
5 RTC1 CMOS battery (RTC battery)
6 CRB1 Card reader board connector
7 SPKR1 Speaker cable connector
8 BLUE1 Bluetooth board cable connector
9 FP1 Fingerprint board cable connector
10 TPAD1 Touchpad board cable connector
11 INTMIC1 Internal microphone cable connector
12 LEDB1 LED board cable connector
13 KB1 Keyboard cable connector
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1 MDC1 Modem board connector
2 BAT1 Battery pack connector
3 ODD1 Optical drive connector
4 DMI soDIMM slots
5 U57 ATI M690G chipset
6 MINIC1 WLAN board slot
8 SATA1 Hard drive connector
9 U52 Processor socket
11 FAN1 Fan cable connector
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