Solved PC won't boot but fans are!!

[SoNibba]

I've just build my first computer and it all got fine; I've installed Windows and I could finally use it. After that, I opened the Bios to boost at the max mhz the rams (obv my motherboard support that mhz) but after activating the xmp profile, saving and resetting, when the pc should have restarted it didn't boot, or better it boots but there's no image on the monitor. I can clearly see that the fans (of the case and the cooling) are properly working but the motherboard is not (I can see that the rgb on the MB is not on), as well as the gpu (the gpu fans aren't spinning). Maybe the problem is with the PSU but mine is a non modular so there shouldn't be any problem with cables.
Very important, when I turn on the pc, I can't turn it off (the on/off button on the case doesn't work) so I have to do it from the psu switch.
Any expert can help me? Please,

Removed expletive from post.

 

[phillpower2]

Sorry but you have post on a tech forum asking for help but have provided zero information about your computer or it`s hardware, this makes it impossible for anyone to even hazard a guess as to what is going on.

Post the brand and model name or number for the CPU, MB, the RAM (including the amount and speed) add on video card if one is used and the PSU (power supply unit) providing these details will enable folk to better help you.

 

[SoNibba]

That's my build:
AMD ryzen 7 5700x
Sapphire radeon rx 6800
Gigabyte aorus elite ax v2
Corsair vengeance 2x16gb 3600 MHz
Crucial P3 plus NVMe M.2 1TB
Coolermaster masterliquid ml240r rgb
Coolermaster masterwatt lite 700 230V
Case NXZT H5 elite

 

[phillpower2]

Two major issues there;

AMD ryzen 7 5700x
Corsair vengeance 2x16gb 3600 MHz

The RAM is not appropriate for your CPU, AMD state here up to 3200MHz and if you have XMP or DOCP enabled the RAM will get auto OCd past what the CPU can handle and the PC fall over.

Modern RAM has two speeds, SPD (serial presence detect) and XMP, SPD is what the BIOS detects on boot which for DDR4 is most often 2133MHz and XMP which when enabled will set the RAM to run at the maximum speed that it is capable of.

Sapphire radeon rx 6800
Coolermaster masterwatt lite 700 230V

The PSU is so bad that it is rated as – Tier E • Avoid

As a starting point and because you are not even getting a BIOS screen;

The following checks require the computer case to be opened so take the following safety precautions 1st, disconnect the power cord from the wall socket, press the case power button for twenty seconds or so to get rid of any residual charge in the system, take anti static precautions before touching anything inside, you can do this by touching a bare metal part of the case or PSU.

Remove the CMOS battery from the MB and leave it out for ten minutes or so and while it is out again press the case power button for twenty seconds or so to get rid of any residual charge in the system.
Put the CMOD battery back in.
Reconnect the screen to the GPU, the keyboard to one of the black USB 2.0 ports (this is a must) and the power cord to the wall socket.
Turn on the power to see if the PC boots up.

it boots but there's no image on the monitor.

A computer has not booted until you are in a fully working Windows or other operating system.

Very important, when I turn on the pc, I can't turn it off (the on/off button on the case doesn't work) so I have to do it from the psu switch.

Restoring the BIOS defaults will not help if an incorrectly wired or broken case switch has hosed one or more of your components.

 

[SoNibba]

Thank you a lot. I've got a question; before removing the cmos should I remove all the parts and wires attached to the motherboard (ram, cooler, ssd, etc) or can I just leave it attached since it's all off?

Another question, if the goal is to reset the Bios, can I simply use the jumper on the motherboard by using a metal object to connect the two pins for a few seconds? And If so, can I do it with all the parts attached to the motherboard since it's all off?

 

[phillpower2]

To avoid accidents please just stick to the exact steps that were provided in my reply #4, no screwdrivers etc near the hardware = the removal of possible short circuits and electric shock.

 

[SoNibba]

Brother it worked!!! Thank you very much, I don't know what would have happened without you. Now a last question, there is a way to boost (overclock) the ram to the maximum allowed from the cpu (3200MHz) without crushing everything? If not I'd use them at 2139 MHz and enjoy my new computer.
Thank you again.

 

[phillpower2]

Good news but do keep on board that you need to swap the PSU asap as the present supply is woeful.

Read your MBs user manual for how to manually OC the RAM to 1.35V and 3200MHz, try 300MHz to begin with and if all good increase it to 3200MHz and then leave well alone.

Your GPU requires a minimum of a 650W PSU supplying the system but not just any old 650W PSU will do, for stability it must be a minimum of Gold efficiency rated and from a proven brand such as the Corsair RM range, EVGA or Seasonic, see Which power supply do you need?