Question Asus Prime Z-790P D4 Asus motherboard is not booting

[adao1993]

Hi,

Recently, I purchased an Asus Prime Z-790P D4 Asus motherboard, along with new memory sticks (Corsair CMH32GX4M2D3600C18 Vengeance RGB Pro SL 2x16GB DDR4-3600MHz CL18 1.35V) and a CPU (Intel i5-12400F) but unfortunately, the motherboard does not boot.

When attempting to power on the computer, the power LED initially blinks rapidly, then transitions to a slightly slower blinking pattern, and finally, it blinks very slowly. The LED continues to blink at this slow pace persistently until I shut down the computer.

I uploaded this video on youtube to show the issue:

View: https://youtube.com/shorts/FMNFBpoGUdA?feature=share


According to asus support faq (https://www.asus.com/support/FAQ/1047023/)

1. Fast Blinking (When the power LED flashes fast (a cycle of 0.25s) means that No DRAM was detected
2. Slow blinking (The power LED flashes slowly (a cycle of 2s) means that no VGA was detected
3. Very slow blinking (The power LED flashes very slowly (a cycle of 8s) means that no Boot Device was detected

Here is the list of all solutions I have tried:

1. Removed the second DRAM stick and attempted to turn on the computer with only one DRAM stick (in the B2 slot).
2. Attempted to power on the computer without the graphics card, connecting the HDMI cable directly to the motherboard port. Unfortunately, my recently purchased CPU (Intel i5-12400F) does not have an integrated graphics card, so this did not work.
3. Tried to clear the CMOS by jumping the pins with a screwdriver first and after getting no results I also removed the motherboard battery (for approximately 10 minutes).
4. As I upgraded from an old system with a 4th-gen CPU and an older motherboard (Asus 497M-E), I also attempted to install a fresh copy of Windows 10 using a USB drive. However, the computer failed to boot, exhibiting no response as if the Windows 10 installation USB drive was not inserted.
5. Downloaded the latest BIOS from Asus (https://www.asus.com/motherboards-c...-d4/helpdesk_bios/?model2Name=PRIME-Z790-P-D4), copied it to a formatted FAT32 USB drive, and used the BIOS rename tool. Despite these efforts, the power button continued to exhibit the same blinking pattern.

The motherboard is still under warranty; however, the store from which I purchased it is known to have a lengthy process for returning under-warranty items, taking approximately 2-3 months based on online feedback, so, I would prefer to explore the warranty option only as a last resort.

 

[helpstar]

try using only Dimm slot A2
check the cpu socket of the motherboard for bent pins
be sure all psu connections are plugged in. psu side and motherboard side