My Dell XPS 410 wouldn't turn on. I replaced the power supply, but still nothing. I really like it and would like to repair it if possible. The small light on the motherboard lights up, but that's the only sign of life.Thanks-

replace power supply

Get another power supply unit and check to make sure the power button is not sticking. That is how I would handle the matter. John

Most likely, power supply or motherboard.

Hi,

This issue happens when your computer is using or requiring a large amount of power source or the power supply is simply dying out already. You may want to update the BIOS. If the problem perists, replace power supply.

I hope this works for you. Good Luck!

Mongkey
"Understanding explains better..."

sounds like possible hard disk failure or memory issue...insert the original cd and choose the repair option.

Did you not wear an antistatic band? If not, you have killed your PC.

I suggest replacing the memory as the diagnostics lights suggest.
Memory can and does fail in some cases.

Ok to troubleshoot it, connect the PSU to the MotherBoard ONLY, test, you may find that with it connected to the MB only it doesn't work, remove RAM and check, if PSU still No Go then MB is faulty if OK, add devices, DVD, Hard Drive, one at a time untill you find one that stops the PSU, that is ya faulty bit. replace it.

you can replace the max cpu power for your pc that is compatible to your motherboard or the cpu socket.

there is a strong possibility that you have a video card failure.