eMachines D620 Service Guide - Page 98

Standard Operation Procedures of Password Bypassing and BIOS Recovery, Fn+ESC, Power Button - recovery disk

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Standard Operation Procedures of Password Bypassing and BIOS Recovery For RD and CSD to debug easily, the system provide one hardware open gap for bypassing password check, and one hotkey to enable BIOS recovery. As to BIOS recovery, except for BIOS recovery hotkey, you can also use crisis disk to restore BIOS. 1. Hardware open gap: Gap G41 Description Bypassing Password Check RD/CSD can enable or disable this function by shorting the gap. The gap is located as shown. 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 3. Restore BIOS by the Crisis Disk Enable this function by pressing the combination: Fn+ESC, and pressing the 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. If this function is enabled, the system will force the BIOS to enter a 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 be powered on with Crisis Recovery process. d. BootBlock BIOS starts to restore the failed BIOS code. Short beeps should be heard when flashing. e. If the flashing process is finished, a long beep should be heard. f. Power down the system after you hear the long beep. If the crisis recovery process is finished, the system should be powered on with the successful BIOS. RD/CSD can then update the BIOS to a workable one by regular BIOS flashing process. 108 Chapter 5

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108
Chapter 5
Standard Operation Procedures of Password Bypassing and BIOS Recovery
For RD and CSD to debug easily, the system provide one hardware open gap for bypassing password check,
and one hotkey to enable BIOS recovery. As to BIOS recovery, except for BIOS recovery hotkey, you can also
use crisis disk to restore BIOS.
1.
Hardware open gap:
RD/CSD can enable or disable this function by shorting the gap. The gap is located as shown.
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
3.
Restore BIOS by the Crisis Disk
Enable this function by pressing the combination:
Fn+ESC
, and pressing the
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. If this function is enabled, the system will force the BIOS to enter a
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 be powered on with Crisis Recovery process.
d.
BootBlock BIOS starts to restore the failed BIOS code. Short beeps should be heard when flashing.
e.
If the flashing process is finished, a long beep should be heard.
f.
Power down the system after you hear the long beep.
If the crisis recovery process is finished, the system should be powered on with the successful BIOS. RD/CSD
can then update the BIOS to a workable one by regular BIOS flashing process.
Gap
Description
G41
Bypassing Password Check