I have been suffering from failure in Optiplex 790. All the units had same problem and i have returned the units number of times since last few months. The PSUs fails to power on but power light can always be seen flashing with amber color. There are no sign of diagnostic lights also. When searched this on the internet i found another couple of users having the same problem. I had to change both my PSU and the motherboard to solve this problem. Has anyone of you encountered the same issue? Can i know the cause of this?
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