Optiplex 390 won’t boot

Question

I brought an Optiplex 390 on eBay a few months ago It has 8gb ram, gtx 1050, and an i5 processor with the stock psu. So today I left the PC on overnight to download a game and when I came home it would turn on and turn off with the led number 3. Also, the motherboard has a solid orange color but that was on since I got the system. Now it turn on for a few seconds with a orange power button and led 1,3 and today the power button does nothing and I have to unplug the power to get a sign. It start with a orange power button then turn blue and end with led number 3 then turn off

JOcean · Answer

It certainly would appear that the mainboard is bad, but considering the age of the system, it might be wiser to consider buying a new unit. The 390 is around 7 years old or so.

JOcean · Answer

Here is a link to the diagnostic codes. https://www.dell.com/support/article/us/en/04/sln284978/a-reference-guide-to-the-dell-optiplex-diagnostic-indicators?lang=en

Westchan · Answer

So do I have to replace the main board

Westchan · Answer

Yes I checked but nothing seem to match

JOcean · Answer

According to the codes, 3 is a possible mainboard failure and 1 and 3 is also mainboard or power supply or peripheral. However a blue button and the 3 means a CPU failure. Any way you look at it the mainboard and/or the CPU looks to be bad.

Westchan · Answer

I don’t have the money so that not a option so if I upgrade part by part would that be good

paetsdellcc · Answer

Cheap dell 390 motherboard,you can have a look. http://www.parts-dell.cc/product-detail/dell-optiplex-390-desktop-motherboard-system-mainboard-f6x5p/ Also you can find cheap dell 390 power supply here: http://www.365powersupply.com/product/3wn11-03wn11-cn-03wn11-240w-dell-optiplex-390-790-990-3010-sff-desktop-power-supply/ Hope that will help you.

Westchan · Answer

Does it have to be dell I want to use different motherboard and psu

bradthetechnut · Answer

The motherboard would have to be a Dell. Dell is very proprietary as in Dell cases only fit Dell motherboards and so on. I'd lean toward getting a refurb vs. dusty used. It's more likely to come with a warranty or return policy that way.

Tip: As for the PSU, use search terms for what you're looking for in Google, eBay, and Amazon.

EBay and Walmart.com both have good deals on Dell refurb computers.

Westchan · Answer

@bradthetechnut wrote:

The motherboard would have to be a Dell. Dell is very proprietary as in Dell cases only fit Dell motherboards and so on. I'd lean toward getting a refurb vs. dusty used. It's more likely to come with a warranty or return policy that way.

Tip: As for the PSU, use search terms for what you're looking for in Google, eBay, and Amazon.

EBay and Walmart.com both have good deals on Dell refurb computers.

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Optiplex 390 won’t boot

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