User Manual for Models HG2, HP2, PSM and PSL.
Version 1.0
Page 16/17
Troubleshooting & Maintenance
SYMPTOM
COUNTERMEASURE
No power?
After plug main connector, such as 24-pin or 20-pin and aux. connectors
if needed, to motherboard socket, make sure AC power cord gets AC line
source that is on wall outlet, to this product power supply. If AC power
cord gets AC line source through power bar or UPS, turn on these
devices first.
If product model is HG2, set I/O switch of power supply panel to “I” or
“ON”. Other models HP2, PSM and PSL don’t have line power I/O
rocker switch.
Boot system from computer case I/O.
Check product specifications and calculate actual current requirements of
each DC voltage. Make sure these requirements fall within the minimum
and maximum range of power supply. (i) If the current requirements are
below the minimum load spec., the power supply may not start up.
Increase load. (ii) If the current requirements are over the maximum load
spec., our over protection circuitry will latch and shutdown the power
supply. Reduce load or use larger capacity power supply.
There may be a system incompatibility or wrong connector pin out or
connection, when power supply its fan has spin for while then shutdown.
For example, (i) Use wrong pin assignments of 24-pin and 8-pin
connectors e.g. For AMD Athlon MP Motherboard connectors are totally
different than Intel Xeon motherboard. Severe damages may occur by
plugging wrong connection. (ii) Plug wrong pin position on small 4-pin
floppy drive connector to cause connection displacement.
[Action]
Remove all connectors at all first, then one-by-one to plug in
one connector at a time and verify the operation of each device and
system function. When no problem, proceed next device.
The power supply could be latched by self-protection function (e.g. “over
voltage”, “over current”, “overload”). Remove the power cord, wait for
20 seconds or more to discharge its electricity, then plug in the power
cord again, try to restart the computer.
Power is on, but no
monitor display?
Check if video card is seated properly; check the video cable connection.
Verify system and motherboard requirements. For example, some
motherboards require RAM in pairs to work properly, such as Tyan
#S2665.
