CPU Light on new PC Build - help

[TolgaK]

Hello, yesterday I built the following pc
- MSI PRO Z790 A WIFI DDR5
- 14700KF

- ASUS RTX 3060 Ti
- Gskill Trident Z5 RGB 2x16GB 6400MT CL32
- EK Nucleus 360 RGB AIO
- Samsung 990 Pro
- Corsair MP510 (reused)
- SATA SSD (reused)
- 2x HDD (reused)
- Corsair RM850X PSU
- NZXT H440 (reused)

Put it all together, wiped off the preapplied thermal paste and applied thermal grizzly instead. I turn it on, everything lights up, but it doesn’t post and the CPU Red light stays on.

Have tried:
- flashing BIOS to latest version using Flash BIOS button and 2 different USB sticks
- reseating the CPU (to which there was some extra thermal paste on the edges of the CPU, but it’s non conductive thermal paste)
- switching the ram sticks around and only using one in the a2 slot
- unplugging all 3 SATA drives
- checked all power supply cables were deeply in

Not sure what the problem is! Can anyone help?

[leclod]

Did the bios flashing seem to go through ?

Next time maybe buy a non-F cpu.

So you never even entered the bios ?

Edited November 26, 2023 by leclod

[TolgaK]

9 hours ago, leclod said:

Did the bios flashing seem to go through ?

Next time maybe buy a non-F cpu.

So you never even entered the bios ?

The bios flashing seems to go through, yes.

 

i have not even entered the bios yet

[leclod]

Still strugling ?

Did you use the original psu cables ?

could you maybe send a few good pictures of your connected motherboard.

Maybe take the motherboard out of the case on a non conductive surface and try to run it minimal.