Dell XPS400 No Start!!

go to dell website and see what those lights are meaning, I can't help with no exact brand and model (Dell - model ....)

Without a diagnostic meter to check, it is cheaper to replace the power supply. You could take the power supply into a place that sells computer parts and see if they can test it. They fail, especially OEM and they have a lot of complexity to them .

You more likely had a temperature issue with the CPU.
Had the CPU fan started to sound like an airplane warming up?
If so, you may have finally burned out the CPU.

Yes it's possible that it was reporting a problem with the power supply, but the only way to know for sure is to replace it.

In the meantime, eliminate everything else.
Disconnect power from EVERYTHING except the motherboard.
If it powers up, then it's possible that either your motherboard is failing (and now works under the decreased load), or one of the things you unplugged has failed.

If the unit springs to life, turn it off, and start reconnecting things.
If it fails constantly whenever 1 specific thing is plugged in, that thing or the motherboard chip that controls it is the problem.

Remove the battery and power cable from the system and press the power button for about 5 seconds, then plug in the charger and start the laptop. it will work. shutdown it and put the battery back and start once again . now you can see its working

press and hold power button it is in hibernation mode when light is blinking power button is a momentary type of switch...

error 11

If the power button on the tower is flashing Amber, the fault is the power supply. Replace the power supply and they system should work.
If the power supply doesn't resolve then the 2nd most likely failure is the Front IO panel (Circuit card behind the power button)

3 most common solutions to your problem are:

1. Bad power supply; once it heats up will quit without warning
2. Bad heatsink/fan; processor heats up and will lock up your Pc
3. Bad motherboard

Try opening the machine and give the inside a thorough cleaning, paying special attention to the heatsink and fan. Once clean and you've ensured the fan is operating, put it back together and see if your problem is fixed. If not, a new power supply will likely fix your problem. Best of luck.
Greg

i have a dimension 4600c. same problem. amber flashing light no sounds. replaced my power source and its now working fine. bought one on ebay for $47

hi
stuart

just read this carefully.................

Unplug the power cord and the display cable from the monitor. Now press the power button for 60 sec exact. Plug the cables and your system is working................ This is just a power drain.

Enjoy