Question Keyboard not working

[Amalkapinkasova]

I have tried to upgrade my PC - changed CPU, GPU, added 8GB RAM and changed the power supply to keep up. However after turning the PC on only the BIOS starts up and the PC doesn't continue with the boot up. When I try to connect the keyboard it doesn't power up, only if I turn on the computer with the keyboard already plugged in I can see it's getting power but PC doesn't react if I press any keys (for example to go to bios setup). Hardware-wise it seems everything is running ok.

I had trouble with bios update before I changed the components though. The bios seemed to have finished updating but when I tried to turn the PC back on, only black screen showed, nothing on it, not even an underscore, just the screen lit up but stayed black. I read it can be caused by too old GPU so I went ahead and tried to chnage the components hoping it will jog it up. Now at least I get to the point where the motherboeard logo shows with the possibility to start up the bios setup but can't do anything here.

Is there a way to fix this? How can I get my PC running?

 

[Lutfij]

Welcome to the forums, newcomer!

We're going to need more info to make sense of your issue. When posting a thread of troubleshooting nature, it's customary to include your full system's specs. Please list the specs to your build like so:
CPU:
CPU cooler:
Motherboard:
Ram:
SSD/HDD:
GPU:
PSU:
Chassis:
OS:
Monitor:
include the age of the PSU apart from it's make and model. BIOS version for your motherboard at this moment of time.

Since you changed parts we'll be seeing two sets of specs, one for before the upgrade and one for after the upgrade.

I had trouble with bios update before I changed the components though. The bios seemed to have finished updating but when I tried to turn the PC back on, only black screen showed, nothing on it, not even an underscore, just the screen lit up but stayed black.
Some motherboard's have a sequence you need to follow in order to upgrade your BIOS. Can you state the BIOS version prior to your upgrade process?

Moved thread from Computer Peripherals section to Systems section

 

[Amalkapinkasova]

Original build (2018)
CPU: AMD Ryzen 5 2600
CPU cooler: included with CPU
Motherboard: GIGABYTE B450 AORUS M
Ram: Patriot 8GB DDR4 2666MHz
SSD/HDD: WD Green SSD 240GB 2.5"
GPU: ASROCK Radeon RX 570 Phantom Gaming D 8G OC
PSU: Corsair VS450
Chassis: Zalman T5
OS: Windows 10
Monitor: LCD monitor 22" Philips 226E9QHAB

Upgraded build (2024)
CPU: AMD Ryzen 7 5700
CPU cooler: included with CPU
Motherboard: GIGABYTE B450 AORUS M
Ram: 2x Patriot 8GB DDR4 2666MHz
SSD/HDD: WD Green SSD 240GB 2.5"
GPU: GAINWARD GeForce RTX 4060 Python II 8G
PSU: Seasonic G12 GC-650 Gold
Chassis: Zalman T5
OS: Windows 10
Monitor: LCD monitor 22" Philips 226E9QHAB

For the BIOS update I went for the newest version I could see on the GIGABYTE website for my motherboard which was F67d. And I unfortunately don't remeber what version I had before the update should be something around F40/F41 though as I remeber thinking I first need to update to the F40 version but then noticing I have a newer version so don't have to do that.

Both PSUs were brand new when I was installing them, not sure if that's what you mean by age.

 

[Misgar]

I read it can be caused by too old GPU

Interesting. I'd not heard that one before. I have more trouble when I connect a monitor to the wrong port, e.g. motherboard iGPU output instead of PCIe GPU card. Sometimes the BIOS refuses to try alternative graphics outputs if you've plugged the video lead into the wrong socket.

Now at least I get to the point where the motherboeard logo shows with the possibility to start up the bios setup but can't do anything here.

Which CPU allows you to enter the BIOS? The 2600, the 5700, or both?

If you can get into the BIOS, this implies you haven't completely "bricked" the motherboard with an unsuccessful update, which is promising. Of course it still might not be 100% usable, in which case there could be some corruption. You may not be allowed to reflash the BIOS back to an older version, but you could try flashing the same version again.

When you're in the BIOS, check to see if it recognises your RAM and all/any disk drives attached.

Disable any XMP memory overclock.

Check to see if the BIOS is pointing at the drive containing your Operating System and not some other non-bootable drive or bootable network connection.

Remove any USB memory sticks plugged into the computer, in case it's trying to boot from USB.

Both PSUs were brand new when I was installing them, not sure if that's what you mean by age.

Power supplies are a bit like people. When they're brand new, they have an age of 0 years. As the PSU gets older, it reaches its 1st birthday, then its 2nd and so on.

After a number of years, it will reach the end of its warranty. Low quality (garbage) PSUs come with 1 year's warranty, slightly better PSUs with 3 years. Reasonable PSUs come with 5 or 7 years. The longest warranties are usually 10 or 12 years.

If you use a PSU well outside its warranty, especially one with a very short warranty, it's likely to fail sooner than one with a long warranty. Hence the question.

Warranty length is an indication of how much confidence a manufacturer has that they won't have to replace large numbers of PSUs before the warranty expires. In other words, it's an indication of quality. Cheap components age faster and die earlier.

 

[Amalkapinkasova]

Which CPU allows you to enter the BIOS? The 2600, the 5700, or both?

Well not sure if enter is the right word, I can get only to the screen where it shows the motherboard logo and gives option to open the bios setup but then when I press del it doesn't do anything, it's stuck on this screen even if I don't press any keys.

But the 5700 gives me logo, 2600 gave me black screen

 

[Amalkapinkasova]

Also, I didn't know these indicators mean anything for troubleshooting but the VGA led light stays on.

But it feels like there's a driver issue or something. The keyboard doesn't light up if I plug it in after I start the computer, but also doesn't react at all when I press any keys even if it was plugged in and lights up after the start. Like capslock or numlock keys don't change etc.

 

[Misgar]

gives option to open the bios setup but then when I press del it doesn't do anything, it's stuck on this screen even if I don't press any keys

Ah, so you can't get into the BIOS. Shame. It sounds like your BIOS is at least partially "bricked". If you're a dab hand with a hot air desoldering tool and a chip programmer, you might be able to remove the chip, reprogram it and fit a new BIOS. If you're very lucky, your BIOS might be plugged in (not soldered in). Worth a look.

But the 5700 gives me logo, 2600 gave me black screen

I reflashed an old AM4 motherboard so I could fit a "modern" CPU, but in so doing, I lost the facility to fit old 1000 Series CPUs. I was well aware of this change, due to there not being enough space in the BIOS chip to hold all the different AM4 CPUs. To support new processors, you dropped support for old CPUs.

It's vaguely possible your new BIOS doesn't support 2000 series processors after the update.

also doesn't react at all when I press any keys even if it was plugged in and lights up after the start

If you can't enter the BIOS with a USB keyboard, try switching to an old fashioned PS/2 keyboard, if your mobo has a 6-way mini-DIN socket.

I have several old boards where the only way to enter the BIOS is with PS/2, not USB. I can dab the 'Del' or 'F2' keys on the USB keyboard at startup but nothing happens before the Windows log appears and the OS starts up. By the time the Windows Desktop appears, the USB keyboard is working fine.

If I plug in a PS/2 keyboard and tap 'Del' or 'F2' a few times at startup, the BIOS screen appears and I can change the settings.

My guess is by the time the BIOS has detected the USB keyboard, the window of opportunity to press 'Del' has elapsed (timed out).