Memory size in cmos invalid, Memory tests terminated by keystroke, No boot device available – Dell OptiPlex 3010 (Mid 2012) User Manual
Page 52: No boot sector on hard-disk drive, No timer tick interrupt, Non-system disk or disk error

Memory double word logic failure at address, read value expecting value
Description
A memory module may be faulty or improperly seated. Reinstall the memory modules and, if
necessary, replace them.
Memory odd/even logic failure at address, read value expecting value
Description
A memory module may be faulty or improperly seated. Reinstall the memory modules and, if
necessary, replace them
Memory write/read failure at address, read value expecting value
Description
A memory module may be faulty or improperly seated. Reinstall the memory modules and, if
necessary, replace them.
Memory size in CMOS invalid
Description
The amount of memory recorded in the computer configuration information does not match the
memory installed in the computer.
Memory tests terminated by keystroke
Description
A keystroke interrupted the memory test.
No boot device available
Description
The computer cannot find the floppy disk or hard drive.
No boot sector on hard-disk drive
Description
The computer configuration information in System Setup may be incorrect.
No timer tick interrupt
Description
A chip on the system board might be malfunctioning.
Non-system disk or disk error
Description
The floppy disk in drive A does not have a bootable operating system installed on it. Either
replace the floppy disk with one that has a bootable operating system, or remove the floppy
disk from drive A and restart the computer.
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