Acer Altos R720 Series, User Manual

Page: 185 / 186

175
OS
6
PCI I/O
4
power supply
5
processor
3
SAS mid-plane board
4
serial ATA port
4
system fan
5
system boards
17
backplane
19
SAS backplane board
19
mainboard
17
mid-plane board
SAS mid-plane board
21
system diagnostic LEDs
22
system fan
replacing
72
system features
3
system jumpers
23
system memory
reconfiguring
80
system tour
1
system upgrade
33
ESD precautions
35
installation precautions
35
post-installation instructions
36
preinstallation instructions
35
T
tape drive
installing
60
top cover
installing
41
removing
41
troubleshooting
133
confirming loading of the OS
138
hardware diagnostic testing
137
POST error codes
147
problems
138
adapter stopped working
142
cannot connect to a network
141
cannot detect bootable drive
141
cannot detect memory
141
cannot eject DVD/CD tray
140
cannot read DVD/CD
140
controller stopped working
142
DVD/CD drive no light
140
HDD LED no light
139
HDD not recognized
141
initial system installation
135
LAN LED no light
142
network connection fails
142
no characters on screen
143
no video
142
power indicator no light
138
Processors not recognized
139
server boot does not complete
POST
139
system fans do not rotate
144
resetting the system
135
verifying key system lights
137
turning off the system
32
turning on the system
29
power-on problems
30
U
upgrading the BIOS
132