Hello.

I have an Asus P3B-F Rev. 1.04 With two isa slots.
The motherboard worked fine right before it was sendt to me, but when i got it, it freezes in post with strangely behavior.
It shows screen in bios and bios give 1 beep (As if everything is ok), but then it is almost like u hold an button down on the keyboard until it starts beep fast/screaming at you to stop that sh#¤% 🤣

I have a video of the actual problem on my cloud: (For those who will not click external links, this problem sounds almost like you hold an button Down on the keyboard in bios so it beeps fast, only the sound is way more quiet.)
https://1drv.ms/v/s!AqqHie8TaZlehNQj2tvIYVX23GrqDw

I have tested:
#1 - Battery (New)
#2 - I have taken a good look over the components, capacitors look ok (No bumps on top), and the motherboard itself looks like good condition.
#3 - Without no pci card, no IDE drivers (And no cables), different cpu's, different rams, different AGP cards and so on.
#4 - Cleaned ram slots and cpu slots With isopropanol.
#5 - Power supply ok! I have an Rev. 1.03 Version of the same motherboard also, this Does not support the cpu i am planning to Upgrade.
#6 - The Components i have tried on the Rev. 1.04 is now working in the Rev. 1.03 motherboard, so they are all working.
#7 - It is not possible to update bios as everythink freezes.
#8 - I have checket for loose components and parts, looks ok.
#9 - UPDATED - I have now measured every transistor, they are all ok.
#10 - I have also tried to not hold a button down on the keyboard... 🤣

Thank you for all help i can get on this!