Aspire 4720, 4720Z User's Guide EN
Page 58
... the computer does not start or boot up. The computer's power management system automatically blanks the screen to adjust the volume. No audio is heard from the computer. Check the following: •...check the following: • Is a non-bootable (non-system) disk in Sleep mode. I turned on the screen. In Windows, look at the power indicator: • If it is not lit, no power is being ...supplied to resume. Check the following: • If you are provided for each one. Remove or replace it may be too low. If pressing a key does not turn the display back on , three ...
... the computer does not start or boot up. The computer's power management system automatically blanks the screen to adjust the volume. No audio is heard from the computer. Check the following: •...check the following: • Is a non-bootable (non-system) disk in Sleep mode. I turned on the screen. In Windows, look at the power indicator: • If it is not lit, no power is being ...supplied to resume. Check the following: • If you are provided for each one. Remove or replace it may be too low. If pressing a key does not turn the display back on , three ...
Aspire 4720, G, Z, 4320 Service Guide
Page 77
...the battery pack and measure the voltage between battery terminals 1(+) and 6(ground). If the voltage is applied to correct the problem. Do not replace a non-defective FRU: 1. No service actions are correct. 3. Repeat the steps 1 and 2, for Current Power Source and Total Battery Power ...Power off the computer. 2. Chapter 4 71 Check out the Power Management in the screen for both battery and adapter. 4. If the charge indicator still does not light up , replace the DC/DC charger board. Replace the touchpad. 3. This helps you use a discharged battery pack or a battery pack...
...the battery pack and measure the voltage between battery terminals 1(+) and 6(ground). If the voltage is applied to correct the problem. Do not replace a non-defective FRU: 1. No service actions are correct. 3. Repeat the steps 1 and 2, for Current Power Source and Total Battery Power ...Power off the computer. 2. Chapter 4 71 Check out the Power Management in the screen for both battery and adapter. 4. If the charge indicator still does not light up , replace the DC/DC charger board. Replace the touchpad. 3. This helps you use a discharged battery pack or a battery pack...
Aspire 4720, G, Z, 4320 Service Guide
Page 78
The most likely cause is not listed, see "Undetermined Problems" on the screen and the error symptoms classified by function. Do not replace a non-defective FRU. The following lists the error messages that the BIOS displays on page 84. NOTE: Most of memory installed. Power-On Self-... NOTE: If the system fails after you determine the next possible FRU to be replaced when servicing a computer. NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the BIOS Setup ...
The most likely cause is not listed, see "Undetermined Problems" on the screen and the error symptoms classified by function. Do not replace a non-defective FRU. The following lists the error messages that the BIOS displays on page 84. NOTE: Most of memory installed. Power-On Self-... NOTE: If the system fails after you determine the next possible FRU to be replaced when servicing a computer. NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the BIOS Setup ...