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Released in 2009, the Dell OptiPlex 780 Small Form Factor is a mini-desktop computer in Dell's OptiPlex 780 lineup. Identified by the model number DCCY1F.

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Why orange light is coming and fan is spinning too fast with 1&2

sir my dell optiplex 780 orange light is there and fan is spinning too fast and 1 &2 showing

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Green light on power button and orange light in under pc

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@harshsikarwar

Where exactly is the orange light?

Check the 4 diagnostic lights on the back of the PC and see what they show

Here's the manual. Go to p.14 (of 74) to see what they indicate if they're on

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Hi @zaid49341

Here's the service manual for the PC that may help.

A 1 & 2 diagnostic light fault code indicates: A possible expansion card failure has occurred. - see p.15 (of 74 - pdf numbering top left)

Have you installed an extra card on the board e.g. sound card, WiFi card, etc?

If so the code indicates that there may be a problem with it.

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