No POST beeps or light codes?
If it is using a separate graphics card, remove and/or substitute.
Try different RAM.

wrote in message
...
Hi,

I have a Dell Optiplex SX260 small desktop type computer that won't
boot up. When I press the power button, there is no display on monitor,
no
HDD spin up noise. The only "life" I see/hear is the power light comes on
and
the fans run. I tried a bootable CD, but the CD drive doesn't "run".

Note: I protected against static damage using a ground strap to my
body.

I checked all the on board fuses (all good), solder joints, and power
supply output voltages with a load. The CMOS (RTC) battery is good.
I even removed and reinstalled the CPU.

Did anyone have the same problem with this model computer?

Thank You in advance, John