Computer is a company computer for accounting - and has NOT had anything added or changed.
When started cold...get checksum error block v1.0
with "detecting floppy drive A media" and "Insert sys disk".
At this point - I turn off (shutdown by power button) and restart by power button and will restart fine. (Some times I have to do this 2 or 3 times). Most of the time - after its been running awhile it will warm boots without a problem.
Replaced the ram module - no change in behavior.
What should I suspect (replace) next, the power supply?