Question Old CPU wont boot after installing new CPU

[Cubixty]

So Ive had this PC for around 5 years and its worked perfectly during that time. A few days ago I decided to finally upgrade my CPU from a Ryzen 3 1200 to a Ryzen 5 3600XT but unfortunately it was damaged during shipping (a few bent pins which) I very carefully bent the pins back into how they were supposed to be but when I installed it I got the CPU white light on my motherboard. No biggie Ill just return the damaged CPU and put my old one back. Put the Ryzen 5 1200 back in and now its not booting with the CPU and DRAM lights both lit on the motherboard. Tried removing the CMOS battery and tried re-seating and using on 1 RAM stick but still get the same error. Any help would be much appreciated as I really need this up and running for as soon as possible.

Specs: :
MOBO : MSI B450M PRO-VDH Plus
CPU : Ryzen 3 1200
GPU : MSI GTX 970 TwinFrozr
RAM : Corsair Vengeance (2x8GB) 3200Mhz
PSU : Corsair CX550M

Thank you for taking the time to read.

 

[Aeacus]

Put the Ryzen 5 1200 back in and now its not booting with the CPU and DRAM lights both lit on the motherboard.

I'd check the R5 1200 pins once again, just in case. Since it could be possible that one of the pins broke off from R5 3600XT and got stuck inside CPU socket, whereby when you installed R5 1200 into it, it pushed the pins sideways (due to the blockage inside CPU socket).

Other reasons include actual (internal) damage for MoBo CPU socket. Broken off pin can damaged the MoBo as well. New, known to work MoBo would show if your R5 1200 is sound or not.

3rd option is that ESD killed your MoBo. Not that unheard of, especially when you don't have active grounding when working with PC internals.

 

[Cubixty]

I'd check the R5 1200 pins once again, just in case. Since it could be possible that one of the pins broke off from R5 3600XT and got stuck inside CPU socket, whereby when you installed R5 1200 into it, it pushed the pins sideways (due to the blockage inside CPU socket).

Other reasons include actual (internal) damage for MoBo CPU socket. Broken off pin can damaged the MoBo as well. New, known to work MoBo would show if your R5 1200 is sound or not.

3rd option is that ESD killed your MoBo. Not that unheard of, especially when you don't have active grounding when working with PC internals.

Ive checked the R3 1200 pins and they all seem to be in place , and as for the R5 3600XT there are no missing pins as far as I can see. Thing is that when I had the R5 3600XT only the CPU light was on and I forgot to mention that is also had a continuous beep whereas with the R3 1200 I had both the CPU and DRAM lights on. Surely if both had bent pins then they would both display the same error, although I may be wrong.

 

[Aeacus]

At this point, i'd try with 2nd MoBo. Since chances that both CPUs are faulty, are rare. Especially since your R5 1200 worked fine before.

If you don't have 2nd, compatible MoBo at hand, haul PC to PC repair shop and pay for diagnostics + fix.

 

[Cubixty]

At this point, i'd try with 2nd MoBo. Since chances that both CPUs are faulty, are rare. Especially since your R5 1200 worked fine before.

If you don't have 2nd, compatible MoBo at hand, haul PC to PC repair shop and pay for diagnostics + fix.

Will do , thank you for the help