Apple iMac (Summer 2000) Repair Manual Page 179
- Page / 263
- Table of contents
- TROUBLESHOOTING
- BOOKMARKS
Rated. / 5. Based on customer reviews
Troubleshooting Symptom/Cure Tables: System Problems After Startup - 48
USB Problems
USB problems refer to symptoms or issues that may occur with external USB devices
that are attached to the iMac. This could include Apple and/or third-party USB devices.
Possible Cause Possible Fix
Not enough power for the
USB device to function.
The following error message will appear confirming that
a device cannot function at all due to a lack of power. This
lack of power (depending on the device) can be a result of
a disconnected external power source, or not enough
power available from the hub the device is connected to.
The two corrective steps listed in the dialog box (shown
on the next page) provide the user guidance in
troubleshooting these conditions.
USB device experiencing a
partial lack of power.
Similar to the first error message, this error message indicates
a device may not completely function due to a partial lack of
power and gives steps to remedy the problem.
- iMac (Summer 2001) 1
- Take Apart 2
- What’s New 3
- Procedures 7
- Replacement Note: 10
- 5. Pull the bottom housing 11
- Bottom Housing 12
- Replacement Note 12
- EMI Cover 13
- Take Apart EMI Cover - 13 14
- 1. Remove the six screws 14
- SDRAM DIMM 17
- CD/HD Carrier 25
- CD-ROM / DVD 29
- ROM/CD-RW 29
- CD-ROM, DVD-ROM,CD 34
- RW Module Replacement 34
- CD/DVD/CD-RW 37
- Adapter Board 37
- Hard Drive 39
- Hard Drive Replacement 43
- Logic Board 44
- Thermal Pad Information 50
- Thermal Pad Installation 51
- Down Converter Board 53
- Replacement Note: When 58
- Note: The modem is located 59
- Take Apart Modem - 6 0 61
- 3. Turn the logic board to 61
- Note: As you slide the 62
- Modem Replacement 63
- I/O Panel 64
- Take Apart I/O Panel - 65 66
- 3. Turn the logic board 66
- Front Outer Bezel 68
- 2. After removing the tabs 70
- Note: The bezel tabs fit 71
- 2. Pry the tabs off, and 75
- 6. Lift the top rear housing 78
- Divider Panel 79
- Power/Analog/Video 81
- 6. Open the CRT cable 84
- Important: Be careful when 89
- 12. Loosen the CRT neck 90
- 13. Carefully pull the video 91
- Replacement Note: If you’re 94
- Identifying Power/Analog/ 95
- Video Boards 95
- Switch Instructions 96
- Note: To separate the left 102
- ±Warning: This product 105
- Take Apart Antenna - 10 5 106
- • front outer bezel 106
- • top rear housing 106
- • divider panel assembly 106
- 1. Remove the three screws 107
- Take Apart Antenna - 10 6 107
- Important: Note how the 108
- Take Apart Antenna - 10 9 110
- 4. This shows a close up 110
- Take Apart Antenna - 11 1 112
- 6. Remove the antenna 112
- Speakers 113
- Note: If you are certain 114
- Caution: Be careful when 120
- Replacing the CRT 121
- Switch Settings for the LG 124
- Identifying the LG CRT 125
- Identifying the CPT CRT 126
- Take Apart Microphone - 127 128
- 1. Unwrap the bendable 128
- 2. Disconnect the 128
- Take Apart Microphone - 128 129
- 3. Pull the microphone 129
- Replacing the Microphone 130
- Take Apart Microphone - 130 131
- 3. Check that the 131
- Introduction 132
- Searching the Knowledge Base 133
- Troubleshooting Procedures 134
- Block Diagram 135
- Power Flow 136
- Testing for Power 137
- At the Logic Board 138
- Note: To take 141
- The PMU Chip 142
- Power-On Self Test 144
- Logic Board Battery 145
- HFS Plus Formatted Drives 148
- Testing the Modem 149
- Before the Finder Appears 151
- No Power 152
- Possible Cause Possible Fix 153
- No Video or Unstable Raster 154
- Gray Screen 156
- Error Beep(s) 157
- Flashing Question Mark 158
- System Hangs During Boot 159
- After Startup 161
- System Hangs 162
- Distorted Video 163
- Thin White Line 164
- Tinting Video 165
- Garbage Video 166
- Memory Error Dialog 168
- Can’t Wake From Sleep 169
- Network Problems 170
- CD_ROM or DVD-ROM Vibration 171
- CD-ROM or DVD-ROM Won’t Eject 172
- Hard Drive Problems 175
- Sound Out Problems 176
- Sound In Problems 177
- USB Problems 179
- Cursor Problems 181
- USB Printer Problems 182
- Networked Printer Problems 183
- Modem Not Recognized 184
- Modem Dialing Problems 185
- Modem Not Connecting 187
- Modem Dropping Connection 189
- Modem Performance Issues 190
- Upgrades 191
- Note: Place a soft towel or 193
- Important: If necessary 194
- Upgrades - 5 195
- 4. Push the ejector tabs on 195
- AirPort Card 197
- Protective 199
- Guide Rails 199
- Note: It is probably 200
- Connect an 203
- External Monitor 203
- Upgrades - 14 204
- 10. Place the computer face 204
- Upgrades - 16 206
- Adjustments 207
- Information 208
- Important: 208
- Adjustment 208
- Adjustment Tools 209
- Light Meter Setup 210
- Model R77 211
- Note: When the light meter 212
- Caution: Dropping the 213
- Jumper Adjustment 214
- 2. With the power off 216
- Note: The video board 217
- Focus Adjustment 218
- Note: Make sure the 219
- Screen Voltage 221
- Note: Without the 224
- 8. Select the Gray Bars test 226
- Note: The surrounding 227
- Cutoff Adjustment 228
- • prior to the white balance 229
- • in a dimly lit room 229
- Note: The Revert and 232
- Note: Depending on the 236
- 12. Click the Save button to 237
- 13. Proceed to the white 237
- White Balance 238
- 1. Open the Display Service 239
- Utility and select the 239
- Gray Bars test pattern 239
- 2. Adjust the red, green 240
- Note: If you don’t 243
- 9. Click the Factory 244
- Settings button 244
- Geometry 245
- 1. Open the Display 246
- Adjustment Utility 246
- 2. Select the Geometry tab 246
- Note: Don’t use the 247
- Note: Repeat steps 2-4 248
- Note: Rotation 250
- S Correction 251
- Note: Before returning 255
- Exploded View 257
- Exploded View 2 258
- Exploded View 3 259
- Exploded View 4 260
- Exploded View 5 261
- Power/Analog/Video Boards 262
- Exploded View 7 263
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