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Won't boot after enabling CSM

So valorant required some security stuff that is done through bios, and it was all going well until I enabled csm and now my pc just beeps 5 times and reboots, I've already changed my cpu with a know working cpu, and I've reseated the ram, and now I don't know what to do. Gigabyte H310 s2p 2.0 (rev. 1.0) motherboard

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Hi @jfmer6,

What is the make and model number of the motherboard?

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@jayeff it's a gigabyte h310 s2p 2.0 (rev. 1.0)

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What graphic card are you using?

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Evga 1650 super

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@jfmer6

Can't see why a change in a BIOS setting would cause a 5 beep error code which is as you know a CPU problem.

Could just be coincidental that it happened at the same time.

  • Try a power refresh and check if that works in case the BIOS was corrupted. Disconnect the power to the PSU and then remove the coin cell battery from the motherboard. Press and hold the Power On button for a full 30 seconds and then release it. Reinsert the coin cell battery (+ve on top) reconnect the power to the PSU and try turning the PC on
  • Create a barebones PC and check i.e. motherboard with CPU, ram, GPU card (if no integrated graphics), PSU, monitor and keyboard only - disconnect everything else i.e. no HDD/SSD, no CD/DVD drive, no other cards, no external peripherals etc and then try turning it on and check if you can get into BIOS.
  • Do the paperclip test on the PSU to make sure that all the voltage supplies are OK

If still no good you may need the schematics (only one I could find online)

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Unfortunately it did not work, will replacing the motherboard possibly fix it?

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@jfmer6

If the PSU tests OK and since you have tried a different known working compatible CPU the only thing left is the motherboard because if the ram or GPU card were faulty you would get a different beep error code.

So it's either get a new board or the schematics and use them to try to find and fix the problem with the original board

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Page 35 in your manual "CSM Support"

Boot into BIOS and disable CMS.

To access the BIOS Setup program, press the <Delete> key during the POST when the power is turned on.

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It won't post, it's makes the 5 short beeps, and doesn't show anything on my monitor

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Hi @jfmer6 , You mention changing CPU. Was the 5 short beeps happening both before and after changing CPU?

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@jfmer6 Have you had a chance to try what @jayeff suggested yet.?

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@aactech I have not, but could replacing the mobo fix it? I will try this though

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