Aspire 4720, G, Z, 4320 Service Guide
Page 68
Removing the Touchpad Cable 5. Remove the power board. Disconnect the touchpad FFC cable from the touchpad module as shown. 62 Chapter 3 Disconnect the system fan cable and remove the thermal module and system fan as shown. Removing the Thermal Module and System Fan 3. Remove the two screws fastening the power board. 2. Unscrew the six screws fastening the thermal module and system fan. 4. Disassembling the Main Board Removing the Power Board 1.
Removing the Touchpad Cable 5. Remove the power board. Disconnect the touchpad FFC cable from the touchpad module as shown. 62 Chapter 3 Disconnect the system fan cable and remove the thermal module and system fan as shown. Removing the Thermal Module and System Fan 3. Remove the two screws fastening the power board. 2. Unscrew the six screws fastening the thermal module and system fan. 4. Disassembling the Main Board Removing the Power Board 1.
Aspire 4720, G, Z, 4320 Service Guide
Page 75
...the failing operation. Connect the power adapter and check that the DIMM is fully installed into the connector. A loose connection can cause an error. If you suspect a power problem, see the appropriate power supply check in the test items. 3. Go to main board). 2. Press F2 in the... message window. Disconnect the power adapter and install the charged battery pack; Memory check Memory errors might...
...the failing operation. Connect the power adapter and check that the DIMM is fully installed into the connector. A loose connection can cause an error. If you suspect a power problem, see the appropriate power supply check in the test items. 3. Go to main board). 2. Press F2 in the... message window. Disconnect the power adapter and install the charged battery pack; Memory check Memory errors might...
Aspire 4720, G, Z, 4320 Service Guide
Page 76
... 0V, Ground 1. NOTE: An audible noise from the computer and measure the output voltage at the plug of the power adapter for correct continuity and installation. 4. If the power-on page 71. 70 Chapter 4 If the voltage is not corrected, see "Check the Battery Pack" on indicator ...does not light up, check the power cord of the power adapter cable. See the following : T Replace the System board. T If the problem is not ...
... 0V, Ground 1. NOTE: An audible noise from the computer and measure the output voltage at the plug of the power adapter for correct continuity and installation. 4. If the power-on page 71. 70 Chapter 4 If the voltage is not corrected, see "Check the Battery Pack" on indicator ...does not light up, check the power cord of the power adapter cable. See the following : T Replace the System board. T If the problem is not ...
Aspire 4720, G, Z, 4320 Service Guide
Page 77
...period of the total power remaining when installed in the computer. To check the battery charge operation, use the touchpad, the pointer drifts on recharging or discharging. Re-install the battery pack. If the charge indicator still does not light up , replace the DC/DC charger board. If the charge... and let it return to correct the problem. Do not replace a non-defective FRU: 1. No service actions are correct. 3. Check out the Power Management in the screen for a short time. After you identify first the problem is still less than 50% of time. Remove the battery pack ...
...period of the total power remaining when installed in the computer. To check the battery charge operation, use the touchpad, the pointer drifts on recharging or discharging. Re-install the battery pack. If the charge indicator still does not light up , replace the DC/DC charger board. If the charge... and let it return to correct the problem. Do not replace a non-defective FRU: 1. No service actions are correct. 3. Check out the Power Management in the screen for a short time. After you identify first the problem is still less than 50% of time. Remove the battery pack ...
Aspire 4720, G, Z, 4320 Service Guide
Page 81
...is blank. Reconnect the LCD connectors. Speaker System board Chapter 4 75 System board. LCD inverter ID LCD cable LCD inverter LCD System board No beep, power-on indicator turns on and a blinking cursor shown on an external CRT. See "Power System Check" on indicator turns off and LCD... is blank. System board No beep during POST. Power source (battery pack and power adapter). No beep, power-on indicator turns on page 69.. Error Message List No beep Error Messages FRU/Action in Sequence No beep, power-on page 69.. LED board. See "Power System Check" on and...
...is blank. Reconnect the LCD connectors. Speaker System board Chapter 4 75 System board. LCD inverter ID LCD cable LCD inverter LCD System board No beep, power-on indicator turns on and a blinking cursor shown on an external CRT. See "Power System Check" on indicator turns off and LCD... is blank. System board No beep during POST. Power source (battery pack and power adapter). No beep, power-on indicator turns on page 69.. Error Message List No beep Error Messages FRU/Action in Sequence No beep, power-on page 69.. LED board. See "Power System Check" on and...
Aspire 4720, G, Z, 4320 Service Guide
Page 84
...Clear parity checkers Display MultiBoot menu Clear screen (optional) Check virus and backup reminders Try to UserPatch2 Build MPTABLE for multi-processor boards Install CD ROM for boot Clear huge ES segment register Fixup Multi Processor table Search for errors POST done- Check for SMART drive... (optional) Shadow option ROMs Set up Power Management Initialize security engine (optional) Enable hardware interrupts Determine number of ATA and SCSI drives Set time of ATA drives (optional) Initialize...
...Clear parity checkers Display MultiBoot menu Clear screen (optional) Check virus and backup reminders Try to UserPatch2 Build MPTABLE for multi-processor boards Install CD ROM for boot Clear huge ES segment register Fixup Multi Processor table Search for errors POST done- Check for SMART drive... (optional) Shadow option ROMs Set up Power Management Initialize security engine (optional) Enable hardware interrupts Determine number of ATA and SCSI drives Set time of ATA drives (optional) Initialize...
Aspire 4720, G, Z, 4320 Service Guide
Page 86
... board System board Power source (battery pack and power adapter). The system doesn't power-off or on, but system runs correctly Reconnect the inverter board Inverter board System board Power-Related Symptoms Symptom / Error Power shuts down during operation The system doesn't power-on page 69. See "Power System Check" on . System board 80 Chapter 4 Battery pack Power adapter Hard drive & battery connection board System board Power...
... board System board Power source (battery pack and power adapter). The system doesn't power-off or on, but system runs correctly Reconnect the inverter board Inverter board System board Power-Related Symptoms Symptom / Error Power shuts down during operation The system doesn't power-on page 69. See "Power System Check" on . System board 80 Chapter 4 Battery pack Power adapter Hard drive & battery connection board System board Power...
Aspire 4720, G, Z, 4320 Service Guide
Page 87
...Save to Disk (S4)" on page 38. Touchpad Keyboard Hard disk connection board Hard disk drive System board See "Save to Disk (S4)" on page 71. LCD cover switch System board Chapter 4 81 Action in Sequence Power Management-Related Symptoms Symptom / Error The system will not enter hibernation The system... every minute. Internal speakers make noise or emit no sound comes from the keyboard) Hard disk drive System board Press Fn+oand see if the computer enters hibernation mode. Power-Related Symptoms Symptom / Error Battery can't be charged Action in Sequence See "Check the Battery Pack" on...
...Save to Disk (S4)" on page 38. Touchpad Keyboard Hard disk connection board Hard disk drive System board See "Save to Disk (S4)" on page 71. LCD cover switch System board Chapter 4 81 Action in Sequence Power Management-Related Symptoms Symptom / Error The system will not enter hibernation The system... every minute. Internal speakers make noise or emit no sound comes from the keyboard) Hard disk drive System board Press Fn+oand see if the computer enters hibernation mode. Power-Related Symptoms Symptom / Error Battery can't be charged Action in Sequence See "Check the Battery Pack" on...
Aspire 4720, G, Z, 4320 Service Guide
Page 88
... Default Settings", then reboot system. Reconnect hard disk/CD-ROM drives. Printer driver Printer cable Printer System Board Ensure the "Serial Port" in Windows doesn't go higher than 90%. Keyboard System board Reconnect touchpad cable. Power Management-Related Symptoms Symptom / Error Action in Sequence Battery fuel gauge in the Devices Configuration" of BIOS...
... Default Settings", then reboot system. Reconnect hard disk/CD-ROM drives. Printer driver Printer cable Printer System Board Ensure the "Serial Port" in Windows doesn't go higher than 90%. Keyboard System board Reconnect touchpad cable. Power Management-Related Symptoms Symptom / Error Action in Sequence Battery fuel gauge in the Devices Configuration" of BIOS...
Aspire 4720, G, Z, 4320 Service Guide
Page 90
...7. If the problem remains, replace the following devices: T Non-Acer devices T Printer, mouse, and other external devices T Battery pack T Hard disk drive T DIMM T CD-ROM/Diskette drive Module T PC Cards 4. NOTE: Verify that the power supply being used at the time of the following FRU one at... a time. Do not replace a non-defective FRU: T System board T LCD assembly 84 Chapter 4 Follow these procedures to isolate the failing FRU (do ...
...7. If the problem remains, replace the following devices: T Non-Acer devices T Printer, mouse, and other external devices T Battery pack T Hard disk drive T DIMM T CD-ROM/Diskette drive Module T PC Cards 4. NOTE: Verify that the power supply being used at the time of the following FRU one at... a time. Do not replace a non-defective FRU: T System board T LCD assembly 84 Chapter 4 Follow these procedures to isolate the failing FRU (do ...