I have an Optiplex 390 MT. It shipped with the 2GB of the following RAM :
Dell part number 1N7HK
DUAL IN-LINE MEMORY MODULE, 2G, 1333, 128X64, 8, 240, 1RX8
And the following motherboard: MIH61R
The computer will not accept any new RAM. After I add RAM all I get is a blank screen with a flashing cursor.
I have tried both PC3-10600 and PC3-12800. I tried Dell Certified - HYNIX 4GB 2Rx8 PC3-10600U DDR3 DESKTOP MEMORY HMT351S6AFR8C-H9 and that didn't work either.
I have the latest BIOS A11
Does not sound like the memory you installed, is compatible with the OptiPlex 390 MT?
Try using Crucial's System Scanner to find compatible memory, Here;
I finally solved the problem. It was not the RAM, but the Video card a GeForce 9400GT. Once I took it out the desktop had no problem with the RAM.
Anyone had this issue before?