So I'm posting because I couldn't find anything about my particular predicament: I have a 5 year old Dell XPS400 and it recently "died" on me. I was on it and it shut down, then went to reboot but came up with the blinking Amber power light and the diagnostic light #4 was on. Now I looked at the advanced troubleshooting guide for the XPS 400 but they it says nothing about only the #4 light being on. All my fans are going, and HDD is running; its just not booting up.
Now at first I thought it might be the video card because a few weeks ago, the blinking amber light happened to me and I opened up the tower and realized the video card was a little loose. I pushed it back into place and the pc started right up. I wasn't so lucky this time though. So before I go out and buy a new video card, thinking the video card itself is dead, I wanted to post and see if anyone else had any ideas?
So one last time:
I'm running a Dell XPS 400
Blinking amber power light
ONLY the #4 diagnostic LED is on
What do you guys think it could be? Part of me thinks/hopes it just the video card, but the code for a video card problem is #2 and #4, not just #4.
Thanks for the help!
I would pull the video card and see what the diagnostic code is. While you are at it you might want to also remove and re-seat your ram sticks and any other cards you might have in the system.
Generally an undocumented diagnostic code indicates a failed motherboard. Since you also mention that your fans and drives run that for the most part will rule out a bad power supply.
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Forum member since 2003
To help you troubleshoot a problem, your computer has four lights labeled "1," "2," "3," and "4" on the front panel (see "Front View of the Computer").
When the computer starts normally, the lights flash. After the computer
starts, all four lights display solid green. If the computer
malfunctions, the color and sequence of the lights identify the problem.
The computer is in a normal "off" condition or a possible pre-BIOS failure has occurred.
The diagnostic lights are not lit after the system successfully boots to the operating system.
Plug the computer into a working electrical outlet. Also see "Power Lights."
A possible processor failure has occurred.
Reinstall the processor and restart the computer.
Memory modules are detected, but a memory failure has occurred.
A possible graphics card failure has occurred.
A possible floppy drive or hard drive failure has occurred.
Reseat all power and data cables and restart the computer.
A possible USB failure has occurred.
Reinstall all USB devices, check cable connections, and then restart the computer.
No memory modules are detected.
Memory modules are detected, but a memory configuration or compatibility error exists.
A possible expansion card failure has occurred.
Another failure has occurred.
The computer is in a normal operating condition after POST.
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It was the power supply. I replaced it yesterday and I'm all good now. Thanks.
Sorry to resurrect an old post, but I have the same problem... a Dell XPS 400 with blinking amber power light and #4 diagnostic light on.
Where and what power supply did you get?
Check here and here and other vendors that sell OEM parts for Dell PCs. And there's always eBay or Dell's own Spare Parts store @ 1-800-822-6039
If this answers your question, please click Yes
Forum Member since 2004
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Thanks for the options, that was a great help. I also chatted with Dell Sales and they have a refurbished 375W Power Supply for $94.99 . Part number WM283.
I'm going check MicroCenter tomorrow and see if they have any other cheaper alternatives that I can buy locally, just in case it's not the power supply (so I can easily return it if needed).