Lenovo NetVista Hardware Maintenance Manual (HMM) for NetVista 2284 systems - Page 103

Power Supply, When The On/off Switch Is Pressed? Yes

Page 103 highlights

Power Supply 001 - START ATTENTION: Check the Power Override switch, situated at the back of the machine, just above the connector for the power cable. If this switch is activated (switched to on), no power will be supplied to the system. • Power off (unplug) the system unit. Check the power cord for continuity. Replace if necessary. • Check for the correct line voltage from the power outlet, and verify that the voltage selector switch (if present) is set to the correct voltage. • Power on the system unit. 002 - DOES THE POWER SUPPLY FAN RUN? (YES, GO TO STEP 003. NO, GO TO STEP 004.) 003 - DOES THE SYSTEM FAIL TO SHUT OFF WHEN THE ON/OFF SWITCH IS PRESSED? (YES, READ AHEAD. NO, GO TO STEP 005.) • You might have a damaged on/off switch cable assembly • Disconnect the on/off switch cable assembly connector from the power supply connector and take an ohm reading. • Go to step 007. 004 • Disconnect the power cord from the back of the system unit. • Disconnect all power and switch cable connectors from the system board and the power supply. • Disconnect the power connectors to all drives. • Connect any one of the power connector to system board or drive as power load for driving up power supply. • Reconnect the power cord and turn on the power supply. Check Procedures 69

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
  • 84
  • 85
  • 86
  • 87
  • 88
  • 89
  • 90
  • 91
  • 92
  • 93
  • 94
  • 95
  • 96
  • 97
  • 98
  • 99
  • 100
  • 101
  • 102
  • 103
  • 104
  • 105
  • 106
  • 107
  • 108
  • 109
  • 110
  • 111
  • 112
  • 113
  • 114
  • 115
  • 116
  • 117
  • 118
  • 119
  • 120
  • 121
  • 122
  • 123
  • 124
  • 125
  • 126
  • 127
  • 128
  • 129
  • 130
  • 131
  • 132
  • 133
  • 134
  • 135
  • 136
  • 137
  • 138
  • 139
  • 140
  • 141
  • 142
  • 143
  • 144
  • 145
  • 146
  • 147
  • 148
  • 149
  • 150
  • 151
  • 152
  • 153
  • 154
  • 155
  • 156
  • 157
  • 158
  • 159
  • 160
  • 161
  • 162
  • 163
  • 164
  • 165
  • 166
  • 167
  • 168
  • 169
  • 170
  • 171
  • 172
  • 173
  • 174
  • 175
  • 176
  • 177
  • 178
  • 179
  • 180
  • 181
  • 182
  • 183
  • 184
  • 185
  • 186
  • 187
  • 188

Check Procedures
69
Power Supply
001 -
START
ATTENTION:
Check the Power Override switch,
situated at the back of the machine, just above
the connector for the power cable. If this switch
is activated (switched to on), no power will be
supplied to the system.
Power off (unplug) the system unit. Check the
power cord for continuity. Replace if necessary.
Check for the correct line voltage from the power
outlet, and verify that the voltage selector switch (if
present) is set to the correct voltage.
Power on the system unit.
002 - DOES THE POWER SUPPLY FAN RUN?
(YES, GO TO STEP 003. NO, GO TO STEP 004.)
003 - DOES THE SYSTEM FAIL TO SHUT OFF
WHEN THE ON/OFF SWITCH IS PRESSED? (YES,
READ AHEAD. NO, GO TO STEP 005.)
You might have a damaged on/off switch cable
assembly
Disconnect the on/off switch cable assembly
connector from the power supply connector and
take an ohm reading.
Go to step 007.
004 -
Disconnect the power cord from the back of the
system unit.
Disconnect all power and switch cable connectors
from the system board and the power supply.
Disconnect the power connectors to all drives.
Connect any one of the power connector to system
board or drive as power load for driving up power
supply.
Reconnect the power cord and turn on the power
supply.