Chosen Solution

I’ve assembled my new pc and when I turn on it doesn’t start the bios and the dram led is on. how can i restart the bios? Here some photos of the pc

Update (02/18/2020) I’ve resolved it changed the RAM. Update (02/04/2020) @aactech One last question: can the incompatibility of the ram with the motherboard cause the system not to turn on?

Hi @piero90 , The dram light being on indicates that the memory is not being detected or is faulty. If you have more than 1 RAM module, try inserting just 1 module in DIMM A2 position and check.

(click on image to enlarge for better viewing) If still no good try the other modules one at a time. Ensure that you power off the computer and turn off the power to the desktop every time before removing / replacing the RAM modules If you only have the one RAM module you may have to get another compatible module to test with or maybe you could try resetting the BIOS to default just in case it got corrupted somehow. Here’s how to do this

  1. Power off the computer and unplug the power cord
  2. Use a jumper cap to short JBAT1 on the motherboard for about 5-10 seconds. (look in user manual for location of header pins)
  3. Remove the jumper cap from JBAT1.
  4. Plug the power cord and power on the computer. What are the specifications for the DDR4 RAM modules that you have? Update (02/06/2020) Hi @piero90 Any diagnostic board that gives POST error indications and what they mean. Before that try connecting a speaker to the pins on the JFP2 header pins (see image below), start the desktop and listen to the “beep” error codes. Then check online for the beep error codes for MSI motherboards. If the beeps indicate a RAM problem this just confirms what the LED on the motherboard is telling you. As I said try to install a compatible DDR4 RAM module (can you borrow one from someone?) and check if it starts OK if still not then the motherboard should be covered by the manufacturer’s warranty. Also double check your build to make sure that the motherboard is installed correctly in the case (not touching underneath) and that all the cables are in the correct place etc.

(click on image to enlarge for better viewing)

Have you tried resetting the CMOS? (Take out the circular battery and hold power button, then reinsert battery)

@piero90 I had the same problem with MSI z390 Gaming Pro. The ‘fix’ was to put the RAM sticks in slots 3&4.
the system would then boot up fine so you could update bios or change ram settings. nobody can tell me why it worked but I have come across more stories coming up with the same solution.