Solved System won't boot after changing CPU Tags: Boot CPUs Systems AMD Last response: April 12, 2014 9:31 AM in Systems Share fadzioriq April 12, 2014 5:29:19 AM Hello guys, I'm very new here,notmall I just read most of the post here, but now I need some help. Recently I tried to change my CPU. Previously I used AMD Sempron 140 but now I want to change to AMD Phenom II x2 550. My rig are as follows: Mobo: Asus M4N68T-M V2 PSU: Now Cemo ATX-480W-24P 8gb of Kingston ram (4gbx2) HDD: WD Caviar Green 500gb DVD writer combo So upon reading, i've tried to strip my system to use only the Mobo, CPU and ram, but still no luck in booting up the system. I've also update to the current bios, M4N68T-M-V2 BIOS 1001. Still no luck. I also had tried to reset my bios, still no luck. I have come to dead end. Another indicative is that the red LED is staticly on, normally it will blink. Do i need to change my PSU? please tell what I shud do~thx in advance~ More about : system boot changing cpu Reply to fadzioriq Best solution Wolfshadw a c 103 à CPUs a b À AMD April 12, 2014 5:44:30 AM Re-install your old processor and see if it still works. If not, then you've likely killed your motherboard or fouled up the BIOS update (which wasn't necessary). If the old processor still works, then it sounds like a bad CPU. -Wolf sends Reply to Wolfshadw Share fadzioriq April 12, 2014 9:31:36 AM yup I reinstall back the previous processor and it works fine. I doubt it is a bad CPU because I tried it on another pc it was working fine... Reply to fadzioriq m 0 l Ask the community Post an answer Related resources My board won't boot after changing CPU Forum My custom pc won't boot after changing CPU voltage. Forum SolvedPc won't boot after cpu change Forum PC won't boot after system freeze (overclocked CPU 3 weeks ago) Forum After new graphics card installation gpu and cpu fans stopped spinning system won't boot Forum SolvedWindows won't boot after Motherboard/CPU/RAM change Forum System wont boot past BIOS after installing new CPU cooler Forum System won't boot after new CPU Cooler Forum SolvedComputer won't boot after changing PSU and GPU, PLEASE HELP! Forum Computer won't boot after changing ram. Forum PC won't boot after Changing Memory Clock Speed Forum SolvedComputer won't start or boot up after changing motherboard. Forum Cpu wont boot after graphics card and psu change.. Forum Computer won't boot up after changing monitors Forum PC won't turn on after changing cpu cooler (possible motherboard damage?) how do I troubleshoot? Forum SolvedWin 7 won't boot after changing drive's sata connection Forum SolvedPc wont boot after cpu upgrade Forum Help urgently needed. Pc won't boot post bios after changing cases. Forum Really slow startup after changing CPU\CHA fan configurations (SSD boot drive - Windows 8.1) Forum SolvedComputer won't boot after motherboard, graphics card, and cpu upgrade. Forum More resources Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !