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Double-check my attempts to get this thing to POST? (MSI PRO B760-P WIFI DDR4)

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2[H]4U
Joined
Mar 29, 2006
Messages
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Used MSI PRO B760-P WIFI DDR4. 1x and 4x 16 GB DDR4 ballistix tried. Various graphics cards tried.

CPU 14900KS - no POST. So I think the BIOS is too old. Got a i5-12600KF with return policy from Amazon. No POST.

Reset BIOS settings with jumper - no POST.

Anything else I can try? Is the i5-12600KF an old enough CPU to work with even the oldest LGA1700 BIOS or is that CPU already updated?

The diagnostic LED is unclear. The manual says red means CPU not detected and yellow means RAM not detected. What it is doing is that it has two LEDs next to each other with the red one on most of the time and the yellow one flashing once while the red one goes off.
 
Did you make sure the socket doesn't have bent pins and is seated correctly?

Did you flash your BIOS to the latest?

Did you reset CMOS?

Did you just try one one stick of RAM on the second from the left slot? What is the speed of the RAM?

What PSU are you using?

Need as much necessary details to help you troubleshoot.

What graphics card are you using? Is it seated properly with the HDMI or Displayport connected to your monitor from the graphics card? Maybe it's posting, but you don't see it posted? You don't have an iGPU with your CPU's, so don't have it plugged in to your motherboard's HDMI or DP out.
 
El_Capitan said:
Did you make sure the socket doesn't have bent pins and is seated correctly?

Did you flash your BIOS to the latest?

Did you reset CMOS?

Did you just try one one stick of RAM on the second from the left slot? What is the speed of the RAM?

What PSU are you using?

Need as much necessary details to help you troubleshoot.

What graphics card are you using? Is it seated properly with the HDMI or Displayport connected to your monitor from the graphics card? Maybe it's posting, but you don't see it posted? You don't have an iGPU with your CPU's, so don't have it plugged in to your motherboard's HDMI or DP out.
Click to expand...

Yes, I carefully inspected the socket after I got the board.

Can't flash the BIOS without CPU on that board.

I did reset the CMOS. No change.

PSU is an 850w Seventeam which powered a different machine right up to setting up this board.

Tried various NVIdia cards, reseated them, wiggled. I don't think this is it because of the LED pattern I get which indicates it can't POST.
 
What is "left" in this context? Can you express that in "nth from the CPU"?
 
1779051590594.png
 
If the debug lights aren't solid on, or flashing at a constant rate (steady once per second for instance), then it's probably not stuck. Those LEDs are set to turn on when specific interrupts are sent, and off after the next one. So they only stay solid if hung up somewhere, and they will light up "randomly" during a normal, "clean" boot process.

If it does them in a specific repeating sequence, that means you are probably boot looping. That could be caused by unsupported/bad memory or because the motherboard detects bad power and reboots or shuts off for a second. I think usually if there's a CPU/socket problem it will hang rather than loop.
 
Have you tried every ram module one at a time in slot A2 clearing cmos in between attempts? I ran into a similar situation on a DDR4 board awhile back and one of the modules had a bad spd chip on it causing very odd behavior of the post leds and hanging the post.
 
learners permit said:
Have you tried every ram module one at a time in slot A2 clearing cmos in between attempts? I ran into a similar situation on a DDR4 board awhile back and one of the modules had a bad spd chip on it causing very odd behavior of the post leds and hanging the post.
Click to expand...
I will mess with the RAM as indicated today. But keep in mind these 4 modules have just been moved from the previous combo where they worked fine.
 
Sounds like that MB is toast. I beat my head against an Asrock MB last year that refused to boot with similar failure/testing. Until I returned it... the replacement worked on first boot.
 
Back in the day I built a PC with an Abit motherboard. Thought I did everything right, could not get that thing to post. Had my friend take a look and, the specific motherboard had a jumper set so that the battery for the BIOS was dead ( some motherboard manufacturers did this I guess so the battery didn't drain from sitting in a warehouse). Removed that jumper and it was all good. I'm not familiar with your MOBO but it might be worth a look.
 
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