PCI Bus Subsystem failure. Diagnostic test Dell 5421

Question

Hi,

I'm running Online Diagnostic test and I have one error which is PCI Bus Subsystem. But when I run the pre-boot diagnostic test it says that all passed. What should I do with the PCI Bus Substem failure

JOcean · Answer

Try updating and installing the chipset drivers at the 5421 support page here. Make sure to download the driver for the OS that you are using.

criss284 · Answer

Same issue here, please let me know if you get a result.

DELL-Jesse L · Answer

LuciMaze, Click here and install the updated driver.

AMadariaga · Answer

Yes! I have the EXACT same problem!

cafittsy · Answer

Resolution by Jesse L did not work

AdrianG001 · Answer

How to Run a Preboot Diagnostic Test on a Dell Computer

Dell_Bear · Answer

Jesse L's resolution still doesn't work.  Maybe it's a feature of Windows 11.

vib_tripathi149 · Answer

Hi i have dell alienware

i have the same problem, Dell is unable to provide service , and parts(expensive laptop with no support and service)

its surprising to see manufacturer has o solution to this problem

please suggest all possible solution to solve this problem

willvdant · Answer

i have the same issue

Enigma625 · Answer

I also have the same failure message

NYHusker · Answer

Spoke with Dell Pro Support today.  This is a motherboard failure of the PCI slot (at least on my Dell Latitude 5320) where the SSD goes.  So sometimes it doesn't see a hard drive installed at all.

halo572 · Answer

Just got this with a random diagnostic test on my 2016 Aurora, it says the HD has a problem and the SSD is fine.

I am replacing the SSD soon to upgrade anyway and the HD is functioning normally that I am aware, I haven't noticed any problems in 8 years.

I would suggest that with a reported problem stretching 2 1/2 years and with no problem that I was aware of across what looks like various systems - the diagnostic seems flawed.

Almapego · Answer

Same Issue with G15 5511 with all updates aplicated.

Principali · Answer

Almost 3 years later and no fix?

Laura Filli · Answer

I just got this as a warning when I ran diagnostics. I only ran it because my laptop screen & my two external screens all blanked off and on two times. The fan started running really loud, too. It is all back to normal now, but I'm worried because I already had the motherboard replaced under warranty two months ago when the machine was only two months old.

Latitude

PCI Bus Subsystem failure. Diagnostic test Dell 5421

Was this post helpful?