[SOLVED] PC not booting after installing new CPU

[BlueGooner21]

I had recently purchased the intel i5-9400F to replace my old i3. After i installed it and went to boot up the PC it turned on for about a second and then immediately turned off. After browsing youtube for a while and trying different things i still couldn’t get it to work. I ended up coming to the conclusion that the power supply must be dead. I bought a new PS and installed it just to find out that wasn’t the problem. Turns out when i put the old cpu back in, the pc boots as normal. But when i try the new i5, it gives me the same problem.

Any help would really be appreciated

 

[rgd1101]

full system spec?

 

[norcalsc]

you are evidently having some sort of compatibility issue. your new CPU is either not compatible with the existing MB or the MB will need a bios update in order to work. please list old CPU version and motherboard model along with all other system specs

 

[ArchitSahu]

List your full specs. Most likely your current motherboard is not compatible with the new CPU.