Having problems with your Dell Dimension 4550 PC Desktop ?

Standby power LED (CR4G1) comes on but that's it, will not start up. Replaced power supply and entire switch assembly with known good parts. Any possible explanation other than bad motherboard?


Answers :

I have repaired this Model 4550. Unplug power cord FIRST. Is the Replacement Power Supply NEW? Did you plug the Power Supply in BEFORE you purchased it? Always do that BEFORE you buy it.
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