Asus Tuf Gaming x570 Plus Wifi Dram LED blinking - No boot

[Stevie_belfast]

Been troubleshooting this one for a few days.

I have all the voltages, 5V, 3.3V, 1.0V, 1.05V, 1.8V, 2.5V VDDP, 1.2V RAM

Board just sits with blinking DRAM LED.

One thing I have found is 1,8V_SPI at the BIOS chip, pin 8 is only 0.9V. It should be 1.8V

My understanding is because this voltage is low, the bios chip does not get enough power to turn on and hence the board is stuck.

Below are some voltages in that area if anyone can shed any light on it.

Boardview attached also.
https://www.badcaps.net/forum/troubl...1-04-boardview

[Dominik Mikula]

Hi, did you solved your problem?
because i have the same one..

best regards

[Stevie_belfast]

SU2D2 was dead. therefore not outputting the 5V for SU2. Meaning SU2 was not outputting the 1.8V for the BIOS chip. Replaced SU2D2 and board booted.

Hope that helps!

[Dominik Mikula]

Thanks for your reply, i have to check it in the evening. Did you had the same behaviour of the DRAM Led blinking? The QLED Error Digit Display is also flickering with the same frequency.
https://streamable.com/g88zki

[Stevie_belfast]

No worries. Mine didn't have a qled digit display. Yea check you have proper voltage at the bios chip..