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 page 88):

  1. Power-off the computer.
  2. Visually check them for damage. If any problems are found, replace the FRU.
  • Non-Acer devices
  • Printer, mouse, and other external devices Battery pack

Hard disk drive

□ DIMM CD-ROM/Diskette drive Module PC Cards

  1. Power-on the computer.
  2. Determine if the problem has changed.
  3. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
  4. If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:

System board LCD assembly

Chapter 5

Jumper and Connector Information Top View

CN3 CN8 CN4 CN5 CN6 U1 CN1CN2

CN3 CN8 CN4 CN5 CN6 U1 CN1CN2

Socket Cn3 Acer 4520

CN1

PS/2 Port

CN14

Touchpad Connector

CN2

AC Adapter Connector

CN15

HDD Board Connector

CN3

Video Port

SW1

Power Switch

CN4

Serial Port

SW2

LCD Cover Switch Connector

CN5

Parallel Port

SW4

See Next Page

CN6

USB Port

PH1

Microphone-in Jack

CN7

FAN Connector

PH2

Line-in Jack

CN8

Speaker

PH3

Line-out Jack

CN9

LCD Connector

DM1

DIMM Socket 1

CN10

LED/Inverter Board

U1

FIR Port

Connector

CN11

Modem Card Connector

U20

PCMCIA Socket

CN12

External FDD, CD/DVD-

GF1

Golden Finger for Debug

ROM Module Connector

Board

CN13

Keyboard Connector

BT1

RTC Battery

SW4 Settings

SW2

Setting

Switch 1, Switch 2, Switch 3

OFF, OFF, OFF: US keyboard OFF, ON, OFF: European keyboard ON, OFF, OFF: Japanese keyboard OFF,OFF,ON: French Keyboard

Switch 4, Switch 5

ON, OFF: OEM BIOS OFF, OFF: Acer BIOS

Switch 6

ON: Bypass password OFF: Check password

0 0

Post a comment