Intel D850MV

[pathros]

I have Intel D850MV motherboard with two 256 MB and two 128 MB RDRAMs, AGP video card with 128 MB on-board RAM, Samsung 40 GB HDD (ATA) and DVD R/RW drive. Upon plugging the computer to the power source it powers up before the power button is pressed. The power LED, HDD indicator LED and two LEDs on the motherboard light up. The cooling fans on the processor and inside SMPS start rotating.

But there is no activity and no display on the monitor. There are no beeps. The power switch and the reset switch do not function. However if power switch is kept pressed the computer shuts down. The CPU and video card heat sink and hard disk become warm. The DVD LED lights up initially and drive door can be opened and closed.

What could be the problem? I am located reasonably far from authorized service outlets. Any advice useful for my local service person will be most welcome.

 

[g-paw]

Try a different video card and if not that, try a different monitor. Also try a different PSU. Hopefully, you have a 2nd computer or friend that would let you swap parts to test them

 

[BustedSony]

In the bios it may be set to "turn on after power loss" or some such. Regardless this is quite normal behaviour for many systems, and also there seems to be a bug with some Antec power supplies which causes this.

Plug in or restore power, the system comes on but doesn't boot, shut down (it may do so on its own) then turn on with the front button, this time it should boot normally. If not press and hold the "insert" key bottom-right of the keyboard, immediately after pressing the power button, until you see the boot.