DEC DECstation 316+ Service Manual page 29

2.4.2 No Power
This procedure helps determine the cause of the problem when
the DECstation does not power up. Before starting this procedure
be sure you have done the steps in Section 2.4.1.
1. Check the system for loose cables and connections.
2. Check the 115/230 Vac switch on the back of the system unit.
3. Plug the system unit and monitor power cord into a working
ac outlet.
4. Turn on power to the monitor and system unit. Check for
system power. The following are indications that the system
and monitor have powered up:
— Power indicators on the system unit and monitor are on.
— You can hear the fan running.
— You can hear the hard disk spinning.
5. If the system does not power up:
a. Turn off power to the system unit and monitor.
b. Unplug the system and monitor from the ac outlet.
c. Disconnect power to all the hard disk drives and remove
all options.
d. Plug the monitor and system into a working ac outlet.
e. Turn the monitor and system power on. If the system
powers up there was either a faulty device, too many
options installed, or another power related problem.
f. Try booting the system from the operating system startup
diskette.
g. Replace the Digital certified options one at a time and see
if the system powers up each time an option is replaced or
a disk drive is reconnected.
6. If the system powers up and does not boot refer to
Section 2.4.3.
Troubleshooting 2–5