Lenovo 3719, 3821, 3822, 3823 manual Dsa Led

dc power LED				130					error symptoms (continued)
deassertion event, system-event log								28	serial port			74
diagnostic									software			75
error codes				91					USB port			75
on-board programs, starting 90									errors
programs, overview						90			format, diagnostic code							90
test log, viewing					91				messages, diagnostic							90
text message format						90			Ethernet	16
tools, overview					27				controller, troubleshooting								123
diagnostics program, preboot							15		Ethernet connectors						130
dimensions			18						Ethernet controller, configuring									266
DIMM									event logs		27
installation				215					expansion bays				18
installation order					215				expansion slots				18
LED	85, 136								extender card
problems				68					installing			209
removing				210					removing			207
types and installation information								211	external cabling				234
DIMMs
installation sequence for memory mirroring									214
display problems 70									F
drives	16, 18								fan
DSA									LED	79
log	28, 91								fan-cage assembly, installing								172
preboot messages						91			fan-cage assembly, removing								171
DVD									fan, installing			218
drive problems					64				fan, removing			217
drive, installing					188				fans 17, 18
error symptoms					64				FCC Class A notice 284
DVD drive									features	17
removing				187					remote presence						269
									features and technologies							15
E									firmware
									recovery from update failure									122
EasyLED diagnostics									firmware updates					268
about		16							firmware, UEFI-compliant							15
installing assembly						194			firmware, updating					267
LEDs		76							formatting a hard disk drive 260
power-supply LEDs						88			front adapter-retention bracket
EasyStartup									installing			181
using		263							removing			180
electrical input				18					FRUs, installing
electronic emission Class A notice								284	2.5-inch disk drive backplane									200
environment				18					2.5-inch drive cage						204
error codes and messages									extender card					209
diagnostic				91					heat-sink retention module								228
IMM	38								microprocessor					220
POST		30							microprocessor retention module										230
error symptoms									operator information panel assembly											206
CD-ROM drive, DVD-ROM drive								64	system board					232
general		65							FRUs, removing
hard disk drive					65				2.5-inch disk drive backplane									198
intermittent				66					2.5-inch drive cage						202
keyboard, non-USB						67			adapter		184
memory			68						extender card					207
microprocessor					69				heat-sink retention module								227
monitor		70							microprocessor					218
mouse, non-USB 67									microprocessor retention module										229
optional devices					72				operator information panel assembly											205
pointing device, non-USB							67		system board					231
power		73

290ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual