PC wont boot

Yoko

Yoko

Yoko

Associate
Joined
12 Jun 2004
Posts
656
Location
Blackpool
Hi all,

My PC stopped booting this afternoon. Was built by myself around 18-22 months ago. No recent tinkering or changes.

Specs below

7800X3D
2x16GB Team group TCreate 6000Mhz CL30
MSI B650i Edge WiFi
RTX 4070 Super Founders Edition
2TB WD SN770
Corsair SF750
Fractal Terra case

Motherboard red and yellow LEDs light up for around 10 seconds before going off.
Fans spin as normal. Nothing on screen with GPU or onboard gfx.

I have tried:

Resetting CMOS via button on mobo io panel
Removing GPU
Removing SSD
Removing 1 stick of RAM
Testing each RAM stick individually in both RAM slots
Removing and resetting CPU
Replacing PSU

Nothing has helped. I took a picture of the CPU socket after removing the CPU and nothing looks bent or scorched.

My gut says CPU or RAM (both sticks?!?)

I'll likely try and see if I can attempt a blind BIOS flash. If that doesn't help I am open to ideas.

If it is the RAM you can bet I'll be refunded the £95 or so I paid at the time rather than sent replacements
 
It could well be ram, cpu or motherboard.

I could not see an LED area to say what has causing issues in the manual, does it have 1 at all?

Don't suppose you have another system or a friend you can borrow some DDR ram 4 from?
 
Yoko said:
Motherboard red and yellow LEDs light up for around 10 seconds before going off.
Click to expand...
Is this not the normal process?
I thought if there is a fault the LED's stay lit up.

Can you try a different HDMI/DP cable or even a monitor?

Yoko said:
If it is the RAM you can bet I'll be refunded the £95 or so I paid at the time rather than sent replacements
Click to expand...
I do hope this is not the case, would be well out of order (OCUK do not have the 32GB kit now though).
 
Yoko said:
My gut says CPU or RAM (both sticks?!?)
Click to expand...

My gut says this might be the monitor or video cable. Try another monitor.

Failing that, take the motherboard and PSU out of the case and test on the box.

Have you tried measuring or replacing the CMOS battery? It shouldn't have failed so soon but you need to eliminate the possibility.
 
Apologies for lack of updates - no PC so posting on a phone.

I have tried different cables, both HDMI and DP and also different screens (as well as integrated gfx)

Worth noting that keyboard leds don't come on at all. Normally the numlock light is on for example.

Tried a bios flash via USB but not working.

Will strip bare and try to flash with no components.
 
Before rebuilding outside of the case removed all peripharels and front panel headers in case there's a short

You can start the pc with a screwdriver on the pins.
 
Last edited:
Okay still no joy. My CPU cooler covers my ram so stripping and testing has become a right pain!

I was unable to flash the BIOS. Ended up in a loop with the bios updating led flashing for hours.
USB drive was fat32, MBR and file named MSI.ROM

Tried with no components and just CPU and single ram stick. Tried with both PSUs also.

Looks like an RMA job, but what to RMA.

Gut instinct is the motherboard but could be ram or cpu. I could test with other parts but would need to travel to other side of UK.

I'm tempted to pick up a cheap board, 7500F and single stick of 4gb ram just to narrow it down first.

If I can figure out how post a picture from a phone I can should the CPU socket - no pens look bent.
 
RAM tested as working in separate PC - great considering ram price increase of late.

Both 7800X3D and board look dead. CPU wouldn't boot in a good board and donor CPU would not boot in my board.

Donor board and CPU boot fine with my RAM.
 
it will be one or the other

wont be both

I wouldnt bother with BIOS flash unless its a BIOS related issue, can you boot in to the BIOS?

The error lights, did you check the manual to see what the lights refer too?

My bet is the motherboard, worst case scenario is to buy a mobo 1st and boot up with minimal components

Did u try and check your PSU on the donor PC? just to mark that off, I also assume you checked the GPU in the donor PC too?

Unfortunately in a case like this you would need to test each component until you locate the faulty component

Isn't the donor PC the same chipset?
 
Yoko said:
RAM tested as working in separate PC - great considering ram price increase of late.

Both 7800X3D and board look dead. CPU wouldn't boot in a good board and donor CPU would not boot in my board.

Donor board and CPU boot fine with my RAM.
Click to expand...
What was the donor board and CPU?

Maybe the donor board needed a bios update to support X3D CPU.
 
freddie64 said:
What was the donor board and CPU?

Maybe the donor board needed a bios update to support X3D CPU.
Click to expand...
Donor board was a B650 I think. It already had a 7950X3D in it but we used a working 7800X3D as donor CPU.

Tested my board with the donor 7800X3D and it didn't boot. That donor 7800X3D booted in donor board fine.
 
hobib_ali said:
it will be one or the other

wont be both

I wouldnt bother with BIOS flash unless its a BIOS related issue, can you boot in to the BIOS?

The error lights, did you check the manual to see what the lights refer too?

My bet is the motherboard, worst case scenario is to buy a mobo 1st and boot up with minimal components

Did u try and check your PSU on the donor PC? just to mark that off, I also assume you checked the GPU in the donor PC too?

Unfortunately in a case like this you would need to test each component until you locate the faulty component

Isn't the donor PC the same chipset?
Click to expand...
My board won't get to BIOS screen.

Error lights are CPU and DRAM. Same error on donor board which I think is also MSI.
Lights do go off on that one but also never boots with my CPU.
No issues with the other 7800X3D or the 7950X3D in donor board.


Didn't bring my PSU or GPU with me to test.

Does feel like maybe motherboard died and took the CPU with it.
 
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