Troubleshooting Without Diagnostics
Solving Power Supply Problems (Continued)
Problem | Cause | Solution |
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|
|
Power LED flashes Red or | Power supply shuts | Replace power supply. |
Yellow every 2 seconds on | down after system |
|
most models. (continued) | warms up. Thermal |
|
| overload caused by |
|
| bad fan. |
|
|
|
|
| Power supply will not | Replace power supply. |
| turn on because of |
|
| internal power supply |
|
| fault. |
|
Power supply shuts down | Power line selector |
intermittently. | switch on rear of |
| computer chassis not |
| switched to correct line |
| voltage (115V or 230V) |
| (some models). |
Select the proper AC voltage using the slide switch.
Power supply will not | Replace power supply. |
turn on because of |
|
internal power supply |
|
fault. |
|
Computer powered off automatically and the Power LED is:
1.Flashing Red or Yellow four times per second,
OR
2.Flashing Red two times one second apart, followed by a two second pause,
OR
3.Not flashing.
The unit temperature was exceeded. A fan may be blocked or not turning, OR the heatsink is not properly attached to the processor.
1.Unit is in an exceedingly hot environment. Let it cool down.
2.Ensure computer air vents are not blocked and internal fans are running (such as, the power supply fan, chassis fan, and/or the processor fan).
3.Ensure heatsink is properly seated.
4.Contact Compaq authorized reseller or service provider.
Troubleshooting Guide |