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  Dell Optiplex 760 puzzler 
 Date Written 
Michael Schiele Dec 11, 2013, 08:50am EST Report Abuse
Hello everyone. I've got a Optiplex 760 here that's giving me all kinds of trouble and I just can't seem to figure out why.

We recently had a 4 day power outage due to ice. When the power came back on, my 760 would only flash 1 and 3 briefly and 3 solidly when the power was pressed. I did some research and discovered this is usually a power supply error, so I replaced it. Same error. In the next few days I replaced the motherboard with new CPU, the RAM, the graphics card and the DVD-rom. Basically rebuilding it completely and that darn error still shows! Finally, I tried pulling the CMOS battery and letting the unit set for an hour before putting it back together. Now the power button flashes an amber light in a strobe like manner and I can't get the unit to power on. What have I done??

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john albrich Dec 11, 2013, 09:55am EST Report Abuse
>> Re: Dell Optiplex 760 puzzler
If you've not done so, go back to the very basics of system POST debugging, starting with visual inspections, the bare minimum of components, etc

"Basic System POST Debug Preparation"

Follow ALL power disconnection and ESD handling protocols when handling or configuring devices and the motherboard. For example, just "turning-off" a system by pushing the front-panel on/off button does NOT remove all power from the motherboard and some peripheral devices. And disconnecting devices/mobo when ALL the power is not removed can cause catastrophic damage and make what would have been a simple problem much worse. Similarly, improper ESD handling protocols can cause undetectable catastrophic damage. How you handle parts is at least as important as making sure you are using known "good" (individually tested) parts.



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