Won't boot after enabling CSM

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Custom Built Desktop PC

A Desktop PC built from off-the-shelf DIY parts, rather than a prebuilt from a major manufacturer. These can also be built by an SI using off-the-shelf parts.

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Thomas Shafer @jfmer6

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投稿日: 2023年1月28日

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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?

jayeff さんによる2023年1月28日

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

Thomas Shafer さんによる2023年1月29日

What graphic card are you using?

Combat x Computers さんによる2023年1月31日

Evga 1650 super

Thomas Shafer さんによる2023年2月6日

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jayeff @jayeff

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投稿日: 2023年1月30日

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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?

Thomas Shafer さんによる2023年1月31日

@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

jayeff さんによる2023年1月31日

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Hi @jfmer6,

What is the make and model number of the motherboard? — jayeff
Unfortunately it did not work, will replacing the motherboard possibly fix it? — Thomas Shafer
@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 — jayeff