Hello,

I have a problem with Dell Optiplex 9020. (blinking amber and not starting at all )

I have already followed the dell docs to resolve this issue to check the if  PSU  is the source of this problem. I have also tried with another PSU .

The PSU will not have the green light up if the connection (shown in red square in photo) is connected.

I have disconnected the  HDD , bu the same thing.

Also I removed the BIOS cell for a while and returned it , the same thing .(May be put a new one ?)

I am not suspecting the RAM because there is no beep.

PS: I have also tried with another PSU ,  the same result . The PSU  will work and the big fan in the MB will run   if only the cable in green square shown in the picture is connected.

Please advice what  to check next .