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The OptiPlex 755 is an energy-efficient desktop computer designed for businesses. It was released in mid 2007.

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Power problems on Dell 755

My power supply "blew up" so I went onto eBay and got another, have fitted this one and the computer ran fine for 2 days but now it refuses to start, all I've got is a blinking amber light on the front and the monitor saying it's in Power Save Mode

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Hey!

Do you see any diagnostic-LED on the front of your Optiplex? I mean the numbers 1-2-3-4. And does it show any reaction after you tried to turn it on?

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No diagnostic lights on front. Turn it on & power button flashes amber

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There's no diagnostic lights On front. Turn it on power button flashes amber

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Does it flashes in the same interval or are there any pauses between?

If there is no interval try the follwing:

- Open the system

- Remove the PSU cable from the motherboard

- Remove the CMOS battery

Then please wait about one minute, plug all in again and try to turn it on.

Is the PSU cable the big white block going into the green board? Forgive my ignorance. If so I've tried that and no change

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