An0n0m0us

Got a Dell XPS 8700 that's only 18 months old and has been fine right up until yesterday.

When you power it on the fan spins for 1 second then the power recycles it and it just repeats itself.

So it doesn't post, there are no beeps it literally powers on for a second and recycles itself.

Power supply? Motherboard? I've already removed the R290 graphics card didn't make any difference.

It's got 4 banks of 8gb ram but can't imagine it's that as it would post and give error beeps.

It was an £750 machine (got it much less than rrp) that i'm seriously hacked off it's only lasted 18 months.

What is it likely to be if it doesn't even post and the power supply is recycling after 1 second?

I can put a video up on youtube if that would help but i'm not sure it would show much other than what i've explained.

jason7579

I have a Dell that does similar from time to time but I believe that my problem is to do with the graphics card. A few restarts and it normally eventually works.


As you have ruled that out I would remove all but one bank of RAM and see if that cures it, its your cheapest and easiest starting point, and slowly start ruling out piece by piece.

john banks

I have had dodgy RAM causing failure to POST. I would remove all the RAM and reseat one of them, then try another if that fails. Check all other connectors/anything in a socket is well seated. Unplug drives to get to the minimum you can try to get working which might be PSU, motherboard, CPU/fan and a stick of RAM. Consider changing CMOS battery.

An0n0m0us

Cheers i'll play about with it more later and report back.

jonc

Is the processor overclocked or settings in the bios changed from default? You could try resetting the BIOS, usually removal of the battery or via a jumper switch. I had a similar issue, turned out to be the processor, damaged through overclocking.

An0n0m0us

Nope everything is standard on it. Been working flawlessly until yesterday when it started doing this.

An0n0m0us

Should have done the obvious straight off Removed all 4 banks of ram and put back in different slots and bingo it fired up fine. Absolutely no reason for it, the box hasn't been knocked or moved etc and ram was seated securely but don't care it's working for now

In the old days if it was a ram issue you used to get beeps as an error code obviously not any more.

BlkKnight

probably worth running memtest86 to see if a single dimm is faulty

An0n0m0us

Cheers will do just to check it all over.