PC has no POST, no Display, no Beep

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QuntumMan

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This is my first time at DIY building PC's. I have two mATX's that give me no display, POST, or beeps. I've tried general troubleshooting like reseating the CPU, reset the CMOS, and swapped RAM. There's power going to the MB because the LED's and CPU fans are working. I disconnected all the peripherals and drives and no success.

One unit is a ASRock B450M with Ryzen 5 4650G and 16GB RAM.

AMD Ryzen 5 PRO 4650G Renoir 6Core 12Thread 3.7GHz 7nm DDR4 65W CPU Processor

The other unit is a Gigabyte GA-F2A88XM-D3H with AMD A10-7700 and 8GB of RAM.

Both have no Graphics cards.

Both use a 500watt PSU.

Both are on my workbench with no case.

Here is my checklist:

* Double check connections

* Test Monitor

* Reset the CMOS

* Test CMOS Battery

* CPU power connector check

* Motherboard power connector check

* Video card fully seated check

* Video card power connectors fully inserted check

* Swap or interchange RAM modules. Boot with single stick of RAM/RAM fully inserted check CPU installed correctly?

* CPU fan plugged in check

* System speaker connected check

* Swapped PSU

Unplug or disconnect any hard drives attached to the motherboard or power supply.

Unplug or disconnect any peripherals including the mouse and keyboard.
 
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Both have no Graphics cards.
* Video card fully seated check

* Video card power connectors fully inserted check
Bit puzzled by the above, can you clarify for us.

Question, are you sure that both MBs have the appropriate BIOS update for the board to be able to recognise the CPU.

NB: Checked both MB specs and neither appear to have a factory fitted BIOS error speaker meaning that unless you have retro fitted such a speaker you are never going to hear such beeps, see attachment below.
 

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QuntumMan

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Bit puzzled by the above, can you clarify for us.

Question, are you sure that both MBs have the appropriate BIOS update for the board to be able to recognise the CPU.

NB: Checked both MB specs and neither appear to have a factory fitted BIOS error speaker meaning that unless you have retro fitted such a speaker you are never going to hear such beeps, see attachment below.
I probably should have deleted them from the list. I left them on for future reference.
 

QuntumMan

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Bit puzzled by the above, can you clarify for us.

Question, are you sure that both MBs have the appropriate BIOS update for the board to be able to recognise the CPU.

NB: Checked both MB specs and neither appear to have a factory fitted BIOS error speaker meaning that unless you have retro fitted such a speaker you are never going to hear such beeps, see attachment below.
No, I have not retro-fitted the BIOS speaker. There was a new one that came with the motherboard and I bought some spare. I tested them with a 3 volt battery and they all made a clicking sound not a beep and they all have the header pins marked 'speaker' on the end. In either case, there is no clicking sound.
 

QuntumMan

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No, I have not retro-fitted the BIOS speaker. There was a new one that came with the motherboard and I bought some spare. I tested them with a 3 volt battery and they all made a clicking sound not a beep and they all have the header pins marked 'speaker' on the end. In either case, there is no clicking sound.
How can I update the BIOS if I have no display? One MB is brand new and the CPU is compatible. The other MB I bought second hand and the CPU came attached.
 

QuntumMan

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I really think I'm going to have someone else take a look at them. I can't understand why both boards at the same time won't work.
 
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How can I update the BIOS if I have no display?
You can on some newer MBs but the reason why the question was asked is because if the boards have the original BIOS they will not work with later versions of compatible CPUs, when purchasing a new MB and CPU it is up to an experienced end user to make sure that the CPU and MB are out of the box compatible, people new to building rigs would not be expected to know this so you are in no way at fault, AMD have a CPU loan scheme for situations like this btw, see Short Term Processor Loan Boot Kit info here

BIOS speakers should bleep not click and if you want to test one that is connected to the MB just remove the RAM from the MB and press the power on button, if the speaker is connected correctly and the MB getting is getting power you should hear a pattern of either two or three beeps.

I really think I'm going to have someone else take a look at them.
Could be your best option and just put this down to a learning curve.
 

crjdriver

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First of all, there are at least four different asrock B450M boards so post the exact board you are running. I can almost guarantee you that the asrock is not going to run that processor without a bios update. The asrock board is now over 3yr old and no way it shipped with bios 5.0 which is required in order to run that processor. Asrock boards have a label on the bios chip showing what bios is currently on the board. It will be something like P120 or whatever.
 

QuntumMan

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The ASRock is a Steel Legend B450M. I did correct one mistake. Now it runs for about 20 seconds and then it shuts down and keep cycling. But still no beep, POST, or display. I will bet it is something simple. And I'm going to kick myself when I take it to someone else and find out.
Since I bought the Gigabyte from another PC Guru and it already came with a processor, that should work. I'm sorry I didn't bench test it the day I bought it.
Can't I hook up a battery to the BIOS speaker to test it?
 

crjdriver

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What does the sticker or label on the bios chip read? It will look something like the pic below.
 

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QuntumMan

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BIOS is P 2.1. Can you use a battery to test the BIOS speaker? Or attach an LED to it?
 

crjdriver

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BIOS is P 2.1. Can you use a battery to test the BIOS speaker? Or attach an LED to it?
OK, no way it is going to work. What exactly do you want to test? Since the system cannot run in the current config, I am at a loss as to what you want to test.

You have three options;
1 Install a processor that actually is supported
2 Take the board to a shop and have them flash the bios for you. Note a shop will flash a bios at your risk NOT the shop's risk. What this means is that if the bios flash fails, it is your problem not their problem
3 AMD has a loaner program where they will ship you an old processor to use to flash the bios

Really that is about it for options to get this to work.
 

crjdriver

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BTW for future reference, the very first thing you do when you decide to build a system is check for cpu support. This is done on the support page for the motherboard.
 

QuntumMan

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You know something I don't. With all due respect, where did you get that information?
Why is it that ASRock tells me that the Ryzen 5 4650G is compatible?
ASRock > B450M Steel Legend
So where is this list of compatible CPU's. ASRock's Ad is as follow:
"Supports AMD AM4 Socket Ryzen™ 2000, 3000 and 5000 Series Desktop Processors"
What version of BIOS should it be for the Ryzen 5 4650G? Would you know if the newer B450M mobos have the latest update?
Can you give me more details about AMD's program?
 

crjdriver

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You were already told; the support page for your motherboard. If you check the page, you will see that the 4650g is supported from bios 3.90 on. You said you have bios 2.10; no way it is going to work.

Can you give me more details about AMD's program?
You need to contact amd and see if they will send you a processor. I have never had to use this however my guess is that you would have to pay for the cpu or have a deposit charged on your CC then it would be refunded when amd receives the old processor from you.
 
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