Upgrade CPU - No Video

Windows 10 Pro 64 bit version 10.0.19045
MB: ASRock B450M-HDV R4.0
Old CPU AMD Ryzen 3 1200 no integrated video
Video Card: HIS 5450 Silence 1GB DDR3 PCI-E DVI/HDMI/VGA

New CPU AMD Ryzen 5 5600G

1. with original CPU installed: checked and/or updated all software and hardware and Drivers. Latest Win 10 updated etc.
2. Still had original BIOS vers. 1.0. Upgraded BIOS to manufacturer's approved Bios for new CPU (4.x)
3. Removed old CPU and installed new CPU.

Doesn't "seem" to be booting ?? after few seconds get a monitor error 'input not found check your connections" (no video)
Have 2nd (unrelated?) new problem and can not turn off PC. Holding in pwr button all day does nothing. Have to pull AC plug.

Might have screwed up the mobo panel connections as I had to remove the MOBO to install the new CPU. When I unscrewed the old CPU heat sink, the heat sink mounting plate that was attached to the bottom of the mother board disconnected from the MB and was then laying out of reach of the heat sync mounting screws so I could NOT reinstall either the new or old heatsink. So a 10 minute plug in CPU swap now takes half the day because I have to completely remove the mother board just to swap the CPU.

And I may have one of the mobo panel power connections (Pwr switch, reboot switch HD ligts etc.) not wired correctly. At this point I CAN start the PC and it seems to be trying to Post up ... but gives me a monitor "no video connection error"

Old CPU had no integrated video (I left the needed extra plugged in card in place was running dual monitors. a VGA reg. and Display port with HDMI adapter.

New CPU HAS integrated video supporting HDMI, Analog video and Digital display port.

Tried booting with both monitors plugged into old video card. All monitors say "no video connection"
Tried booting with both monitors plugged into the mother boards video ports (analog vga and actual HDMI) no video. Same result.
Tried booting with video card removed ..same result.

Each time I start the PC my monitor(s) display "No signal is detected.. etc" At this point all I can confirm is the power on lite is on, and the CPU and chassis fans start up. But I'm not sure it's even trying to post up. I'll have to pull the chassis apart again to check those mobo panel power connections. And am thinking I might as well put the old CPU back in place and start over. So my question before I do that is ....

I saw reference to needing to install special video software for the new CPU that has the integrated video and thought that would need to be done AFTER I put in the new CPU. Maybe that was an error and I should have installed that new software BEFORE I installed the new CPU? If I have to reinstall the old cpu to do this, it will require another full days work to completely remove and reinstall the MB to do so. The current chassis was the only thing available that would work in my rack system several years ago. It's a HORRIBLE design., and I regret buying it Works fine operationally, but is near impossible to work on it's internal components.

Its on the cpu support list for your mb and you mentioned flashng to 4. bios. Flashing the bios will restore factory defaults and you seem to have tried just about everything that makes sense.

hard to say at this point might need to RMA the part at this point. Try with nothing plugged in except the CPU/cooler and the monitor so remove all ram and unplug everything else, see if it errors.

Not even getting to post is not a good sign because it usually means broken hardware

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No the video driver stuff or whatever it is you are describing won't matter until you get the OS.

It would default to that after pulling the GPU because majority of motherboards detect display adapters, it would also default to igpu when flashing the motherboard unless it can detect a card in the pcie slot.

I think most motherboards will even go by what has a cable connected the setting is really on there for redundancy or if you need to for what ever reason switch between two display adapters.

Update: Pulled the mother board (ugh) so I could put the original Ryzen 3 CPU back in. Note before I pulled new CPU I double checked all the motherboard connection. All were proper. Put the old CPU back in and PC started up instantly and running normal again. I don't think it's a hardware problem. Only thing different and changed was the CPU (other than the prior BIOS change.

Thanks for the notes. Of course I have the original manual and a PDF copy but thanks for that link anyway. Does anyone have any comments on the fact that I didn't install the AMD video software (I believe they called it an "all in one" program and driver pack. It said it was needed if I was installing a Ryzen CPU with the integrated grapics built in. I did not try to install it and maybe I "should" have before I changed the CPU.

It's little confusing because before the CPU change my Bios and over all system required an add on graphics card. My old CPU had no integrated CPU. So now the NEW CPU does have integrated graphics. Couldn't find any info regarding how that swap from a non-integrated GPU processor to an integrated one needs to be handled ?

Do I need to install that special graphics package before I change the CPU?
Do I have leave the plug in graphics card installed after I've installed the new CPU THEN update the drivers for the new integrated CPU graphics.?
Is there some BIOS settng I have to change? The mother board has connections for 3 types of video which I thought only worked when you had a CPU that had an integrated GPU.

Did a quick search on this forum but haven't found much about this CPU swap as far as the video thing goes. Guess next step will be to install that recommended video package the ASRock BIOS web info is referring to. And if that doesn't mess up anyting and all continues to work with the old CPU, I'll then try the new CPU again.

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Thanks Ghot. From memory, my bios does't look like that. I'm running bios 4.50 Let me get back into the bios again and see if I can find your sample screen.

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Concerning my bios, Confirmed currently P 4.50 And for some reason my "primary Video Adapter" in that Advanced/AMD PBS BIOS screen does also say "Ext Graphics (PEG) ... however it is "greyed out" and can not be changed. Perhaps because I AM using an external graphics card (which is working fine with the old CPU ?? Gonna try installing that "AllIn1(v18.50.16.01_WHQL)" that the ASRock bios note says has to be installed if my CPU is of the Cezanne type which the new cpu is (Ryzen 5 5600G ) Old Ryzen 3 is a Summit Ridge.

Just pull the graphics card it will default to the igpu. No you don't need to install any drivers because they don't matter until you log into windows.

Computers can be finicky at times but from what you have said so far its not looking good. Simpily running the computer with no gpu installed means it defaults to the igpu and if it won't even post like that then the CPU probably needs to be RMA.

Ext Graphics (PEG) is the igpu and if it is grayed out then that sounds like a problem because you should be able to set this manually. I would try updating to the very latest bios as you mentioned 4. something is the one you used it goes up to 10 something now.

Outside of that all the stuff you are thinking of trying in windows won't have any bearing on the computer because all that is OS space. The bios is where the problem lies before the OS is even in play.

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Ext Graphics (PEG) Try to get this setting on auto if you can change it at some point. The whole being greyed out sounds like an issue imo and this is the igpu.

The bios could of flashed bad or something try update it to the latest one.

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Try install the all in 1 driver its your last shot as it does say to do this before installing the bios, it should not have any bearing though because 4.1 supports Cezanne CPU and i just downloaded the all in 1 package and inspected it, it is OS side so its not relevant on the first half of startup only when you get to loading the OS.

it depends on when you get the no monitor signal if the computer never posts then its bios issue if it posts or display's a splash screen then its probably on the OS side and the all in 1 driver will be the issue.

Worth a shot and it is probably your issue, if this does not work then i would be RMA the CPU.

Malneb said:

Just pull the graphics card it will default to the igpu. No you don't need to install any drivers because they don't matter until you log into windows.

Computers can be finicky at times but from what you have said so far its not looking good. Simpily running the computer with no gpu installed means it defaults to the igpu and if it won't even post like that then the CPU probably needs to be RMA.

Ext Graphics (PEG) is the igpu and if it is grayed out then that sounds like a problem because you should be able to set this manually. I would try updating to the very latest bios as you mentioned 4. something is the one you used it goes up to 10 something now.

Outside of that all the stuff you are thinking of trying in windows won't have any bearing on the computer because all that is OS space. The bios is where the problem lies before the OS is even in play.

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Ext Graphics (PEG) Try to get this setting on auto if you can change it at some point. The whole being greyed out sounds like an issue imo and this is the igpu.

The bios could of flashed bad or something try update it to the latest one.

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Try install the all in 1 driver its your last shot as it does say to do this before installing the bios, it should not have any bearing though because 4.1 supports Cezanne CPU and i just downloaded the all in 1 package and inspected it, it is OS side so its not relevant on the first half of startup only when you get to loading the OS.

it depends on when you get the no monitor signal if the computer never posts then its bios issue if it posts or display's a splash screen then its probably on the OS side and the all in 1 driver will be the issue.

Worth a shot and it is probably your issue, if this does not work then i would be RMA the CPU.

Excellent info. Thanks. FWIW there is another thread I started a few weeks ago that is relavant to this. That thread was solved and closed but it involved a corrupted CMOS. Problem was couldn't even get past posting or access BIOS at all. It started when I just wanted to check my BIOS before I upgraded the CPU. PC was working perfectly prior to that and then after days of just trying to access BIOS (many muliple boots over a weeks time) suddenly during the last attempt to get to bios the PC crashed and I lost everything. All the while I was just trying to access the BIOS (and could NOT) I could restart the PC normally and windows was perfect. The thing that fixed the original non access to bios and the subsequent total dead (black screen no post etc.) was to clear the cmos. Ran PC after that for a few days and really stressed it but it was back to working reliably without issues. I closed that thread and proceded to continue with my original quest (upgrade the CPU). At that point I was finally able to access BIOS (to check version etc.) Did all the research compatibily etc. and then saw (at the ASRock support web) the recommended BIOS for my new CPU was 4.50. So I proceded to update the bios up to that point. THEN I installed the new CPU and that is why THIS new thread was started. If you look at the history of the Bios updates for this system (starting with my original P 1.0) you'll see MANY updates up to 10.x And each update has many notes about needing this or that etc. I think saw one version (around 3.x something) where it say if you are upgrading from a bios early than x then you must install this update first) Which was that AMD Radeon graphics package. But I ignored that and just went straight to 4.50. Then installed new CPU and we got to this point. So I HAVE reinstalled the original CPU AND then ran the AMD Radeon GPU thing. And am now gonna run the PC for a few days burning it in. If all is good, I will once again try changing over to the new CPU. If that continues to fail .. I will then RMA the CPU for a replacement.

Many thanks for your detailed info. While I'm continuing to test this current setup, I'll have to see about that BIOS setting that is greyed out and unchangable. FWIW when I built the unit originally I remember setting that manually because the original CPU did not have an IGPU. And it WAS always configurable. But now for some reason it's no longer an option. Many thanks for the help. I "wonder" if since I've jumped to a new bios and added a new graphic package (that Radeon graphics) if I should clear the CMOS again and let it reset back to factory defaults before I go any further ?? I agree, that un-changable option in BIOS is something that might have just started with this original problem.

Have been running PC several days with old original CPU. Bios now up to 4.50. PC is working fine. Still have the greyed out option in BIOS. See below:


Regarding increasing the BIOS up 10. I have a question. If that creates a problem will I be able to revert BACK to 4.50 by just re-flashing the BIOS to a lower vers? I'm concerned there might a problem with the mother board and that BIOS setting might cause a problem when I plug in the new CPU. Because right now the setting is FIXED and stuck as a Ext Graphics (PEG) and "maybe" that is why I couldn't get any video when I first tried to install the new CPU?

I'm concerned IFthat BIOS setting can't be changed and I put in the new CPU, that stuck BIOS setting won't switch the graphics to the new CPU? I think I will have to give this a try either way ??

Update BIOS to 10
Remove the plug in video card.
Swap the old CPU (no Integrated graphics) with the new CPU (with Integrated graphics)

Turn on the PC and hope I see video (in which case I'll be happy) OR I'll get a black no video like the first time. Which at that point HAS to be EITHER that BIOS setting still stuck OR a bad CPU. At that point still don't know if it's the BIOS setting OR a bad CPU?

Should I even BOTHER swapping the CPU if I can NOT get that BIOS setting to change with another BIOS upgrade?

Usually you cannot go back to old versions.

Making an assumption I think it will be greyed out now because that original CPU has no IGPU so there is no reason to change it the computer will default to the PCIe slot.
Usually its common that you should still be able to access that setting but it would only have one option to select. All though Bios's do vary and can be different.

I think update to the most recent bios version keep the old CPU in and make sure that the computer works properly like makes to the OS and you can do stuff. Then put the new CPU in and see what happens.

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I would also remove the GPU completely when you put the new CPU in because the computer will still detect it in the PCI slot. Removing the power cable will not stop the card working it might actually still work because the pcie slot gives power up to like 40 or 80 w or something so if the computer is not needing much power to display which is the case at boot. The card could conflict still.

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Reason being you want to test the CPU issue without anything else potentially in the way if it still won't display anything you need to try that all in one driver to make sure this is not the problem. It shouldn't be because hard drives are not even loaded up to a point.
But it does matter when the black screen happens.

Black screen on the first half of boot means faulty hardware or bios issue 95% of the time. If you see an images on the screen like the windows logo and it black screens then it will be a driver.