Other Functions Failure - Acer A315-53G Service Manual

Other Functions Failure

If other functions such as the CRT switch, HDMI switch, LAN connect, etc. fail, perform the
following:
Check if the Drive is working properly.
1.
Check if the test fixture is ok.
2.
Swap the mainboard.
3.
Random Loss of BIOS Settings
If the computer is experiencing intermittent loss of BIOS information, perform the following:
If the computer is more than one year old, replace the CMOS battery.
1.
Run a complete virus scan using up to date software to confirm the computer is virus free.
2.
If the computer is experiencing HDD information loss, disconnect and reconnect the power.
3.
If the BIOS settings are still lost, replace the cables.
4.
If HDD information is missing from the BIOS, the drive may be defective and should be
5.
replaced.
Replace the mainboard.
6.
If the issue is still not resolved, refer to
7.
MB CMOS Discharge
If there is something wrong with the CMOS setting, such as password, CMOS data will be cleaned
to default setting by Discharge (short pads): JCMOS1.
4-18
Online Support Information
Figure 4-14. MB CMOS Discharge
on page 8-2.
Troubleshooting