Dell desktop starts,shuts down, starts, does not reach POST
Hi I have a Dell inspiron, sorry don't k now the model, it was given to me so no papers, and no labels outside to indicate the model, but it is about 4 - 5 yrs old.
Closing the box down as per usual, and the turning off at the power point (which I don't usually do), when switching on the power point next day, the computer started without me pressing the on/off switch. It then immediately shut down and then powered up again. It cycles like this as long as the power is supplied to it.
There is a slight hesitation between the 1st and 2nd cycles, then closer together and regular.
The Dell diagnosis lights go as follows:
1st cycle A: Green B: Yellow (flashes slightly later) C: Yellow D: Green
Subsequent cycles: same as above except all lights flash together.
It does not get to POST (no beeps). Seems like a hardware issue. But what?
Power Supply fan comes on and stays on, sounds like the HD just starts to spin up and stops, CPU fan, same.
I have had a much older Dell that did the same thing, but that wasn't worth rescuing. I would like to save this one if pos.
Any help or test suggestions most welcome.