Hello, i have an dell optiplex 380 mini tower computer,
Recently my psu has burned out and also took the motherboard with him,
Dell technician has replaced both with new parts,
since then i have weird problems that repeat randomaly
1. Sometimes when i restart the computer from the windows(Start->Restart) the widnows shuts down then the screen goes black and the dell logo dosn't appear,
the diagnostic lights shows 1, 3 ,4 and i cant turn off the computer by the power button, not even long press works, the computer fans works at this time,
then the computer restarts himself after 5 - 15 minutes of being stucked on boot,
2. Sometimes when i shut down the computer(Start->shut down) the windows goes off then the screen goes black and the psu still works, also the green power button light is still on and when i press it, it dosn't response, after 5 - 20 minutes the computer will restart himself or shut down.
for making sure it's not drivers problem i have re installed the OS from dell official os cd i got, also installed the drivers in the order: 1.System utility 2.Chipset 3.Graphic card 4.Network card 5.Audio,
Checked all the connectors inside the computer
Also checked the power cable with "Fluke" and its steady 230V.
I have no idia why this problem appears randomaly at least 2-3 times a day, it dosn't should be like that,
also why this happen with brand new PSU and motherboard?
i hope you can help me solve this problem,
Best regards, Adi.