Service manual
General System Problems
Computer Doesn’t Start
If the Rower LED is on, see “Video Problems” on page 2-10. If the Rower LED is off, turn
off the power and check the following:
Be sure all cables are securely connected to the computer.
Check that the computer and monitor power cords are plugged completely into their
electrical outlets.
Test the outlet to see if it supplies power.
Remove the Rower cord from the electrical wall outlet and from the rear of the power
supply module.
Remove the Rower supply and test the continuity of the 4A fuse inside the module
with a multimeter. Replace the fuse if necessary.
Replace the power supply.
Blank Screen
See “Blank Screen” on page 2-l 1.
Power Supply Shut Down
The Power supply contains detection circuits that automatically shut down the power if they
detect excessive operating temperatures. This protects the system from damage due to
overheating.
When these circuits detect a high temperature, they shut off all the DC outputs in the power
supply and the computer stops operating. This does not damage the power supply, but you
must remove the cause of the high temperature before the system can be used again.
After you eliminate the problem causing the overheating, allow the computer to cool down
for at least five minutes at a room temperature of about 25° C (78° F). This resets the thermal
detection circuits.
To determine the cause of the high temperature and correct the condition, check for the
following:
1
A blocked power supply fan. Make sure that nothing blocks the power supply fan
vents. Check both inside and outside the computer for blockage. Make sure there is
ample room around the system for air circulation.
2
Room temperatures of 40° C (104° F) or above. If this is the case, move the computer
to a cooler area.
3
An overload of the power supply limitations. Check the information on page 1-14 to
see if the power limits have been observed.
4
If the power supply shuts off again after you follow the steps above to correct the
problem, replace the Rower supply module.
2-a
Epson
NX Service Manual