Question PC won't post after upgrading cpu

[jack turnbull]

Hi, I've just recently purchased a ryzen 5 5600 to replace my ryzen 2600 but after swapping out the CPU my system no longer posts I have tried putting my old processor back in but I'm not getting anything, my motherboard is on a bios that supports the 5000 ryzen series so I don't understand why it's not working and why my old cpu which was running perfectly fine before the upgrade now isn't working.
I am hoping to take my pc into a pc shop tomorrow if I can't make any progress but posting to see if there is something that I am missing.
Specs are as follows
Ryzen 5 2600 soon to be a 5600
Arous elite b450 Bios version 64b
RX 6600
16GB Corsair vengence RGB
Any help would be much appreciated.

 

[ThatVietGuy]

Replace the 5600 in the motherboard and reset the CMOS by pulling the coin battery on the motherboard.

 

[jack turnbull]

Replace the 5600 in the motherboard and reset the CMOS by pulling the coin battery on the motherboard.

Thanks for the response, I've already reset my CMOS between CPU installs but I'm still not getting anything

 

[Unolocogringo]

A simple bios reset does not do the trick.
Turn off power supply.
Press power button a couple times to drain capacitors.
Remove battery.
Short clear CMOS jumper for at least 30 seconds.
wait another 5 minutes.
Remove Clear CMOS jumper.
Replace battery correctly.
Turn on power supply and boot.
First boot will take a while.
Bios needs to load new processor data and retrain memory for new CPU memory controller. So be patient. This can take a few seconds or a few minutes with restarts.