Acer Aspire Z1650, Service Manual, Page: 92 / 152

84 Aspire Z1650 AIO Computer Service Guide
POST Error Indicators
When a system error is detected during POST (Power On Self Text), the Setup utility will switch to diagnostic
mode and display a POST error message.
POST error messages tell users what failure the system has detected. Some error messages could be related
to a hardware device. Others may indicate a problem with a device configuration. In some cases an error
message may include recommendations for troubleshooting or require that you press the
Enter key to display
recommendations. Follow the instructions on the screen. It is recommended that you correct the error before
proceeding, even if the computer appears to boot successfully.
IMPORTANT: If your system fails after you make changes in the Setup menus, reboot the computer, enter
Setup again and load Setup defaults to correct the error.
Memory
Boot
Message Description
Gate20 Error The BIOS is unable to properly control the mainboard’s Gate A20 function, which
controls access of memory over 1 MB. This may indicate a problem with the
mainboard.
Multi-Bit ECC Error This message will only occur on systems using ECC enabled memory modules.
ECC memory has the ability to correct single-bit errors that may occur from faulty
memory modules.
A multiple bit corruption of memory has occurred, and the ECC memory algorithm
cannot correct it. This may indicate a defective memory module.
Parity Error Fatal Memory Parity Error. System halts after displaying this message.
RAM R/W test failed This message is displayed by the AMIBIOS8 when the RAM read/write test fails.
CMOS Memory Size
Wrong The base memory (memory below 1MB) size that is reported in the CMOS (offset
15h) mismatches with the actual size detected. This condition may occur when
the hole is set at 512K base memory or when CMOS is corrupted.
Message Description
Boot Failure... This is a generic message indicating the BIOS could not boot from a particular
device. This message is usually followed by other information concerning the
device.
Invalid Boot Diskette A diskette was found in the drive, but it is not configured as a bootable diskette.
Drive Not Ready The BIOS was unable to access the drive because it indicated it was not ready for
data transfer. This is often reported by drives when no media is present.
A: Drive Error The BIOS attempted to configure the A: drive during POST, but was unable to
properly configure the device. This may be due to a bad cable or faulty diskette
drive.
B: Drive Error The BIOS attempted to configure the B: drive during POST, but was unable to
properly configure the device. This may be due to a bad cable or faulty diskette
drive.
Insert BOOT diskette
in A: The BIOS attempted to boot from the A: drive, but could not find a proper boot
diskette.
Reboot and Select proper Boot device or Insert Boot Media in selected Boot
device
BIOS could not find a bootable device in the system and/or removable media
drive does not contain media.