Question No signal from GPU, and motherboard VGA LED is lit ?

[gazza1988]

Hello. I've had look through the sticky thread on the checklist.

Please note this is not a new build. It's around 4 years old, built with new parts in 2019.

PC partpicker full specs. -
Msi b450 tomahawk
Ryzen 5 2600x (so no integrated graphics)
16gb corsair 3000 ram
Gigabyte gtx 1660ti 6gb oc windforce (3 fans)
EVGA 750 gq PSU (modular design)
Windows 11 - fully updated.

Stuff done in the past week before the issue.

• Last weekend I cleaned it all out. Using my compu cleaner electric air duster. Been fine until last night/this morning.
• Wednesday morning I updated Windows.
• Thursday (yesterday) I added my kids profiles on the pc. Played some fortnite. Updated the graphics driver. Watched some YouTube. Shut down the PC to go to bed.

Something happened with this shutdown. Usual shutdown process "windows is shutting down". I turned off my monitor, went for a cigarette before bed (I don't smoke inside). Came back inside and the computer is still "on" (rgb on) turned the monitor back on and black screen. I assumed it had just not turned off so pressed and held the power button to turn off and went to bed.

Woke up this morning and it won't boot. VGA LED is lit on the motherboard. All fans and rgb are on and spinning, including the rgb and fans on the gpu.

Troubleshooting steps taken. No fix.

1. Reseated the gpu.
2. Used a different gpu 8-pin power cable and a different port on the PSU itself.
3. Removed the CMOS battery for 15 minutes (I know it's 5 mins but lost track of time) and held the power button for 40s
4. I have tried 1 stick of ram in all 4 slots (I have some other 16gb ram that doesn't play well with corsair so is a spare set) tried 1 stick of each ram in each slot.
5. Some googling suggested to try and boot without the gpu connected and then with it connected. Tried that and still no change.
6. Tried 3 display port cables. 2 hdmi cables (monitor has both inputs) tried connecting via hdmi to my tv and no signal. Tries every slot on the gpu as well. I also tried a hdmi-displayport cable I had from an old monitor I had to use


I have an old computer at my parents house. Amd fx-6300 (or something like that) pre-ryzen amd cpu ddr3 ram. I know this doesn't have a gpu anymore but should be working. They are coming round tomorrow to get the kids and I can ask them to bring it to me to test the gpu.

I'm not sure what PSU is in it 350 or 450 watts is likely but I do have a tendency to go big wattage. Would this be OK to test if the gpu has died? Or would it show an issue on that system if the PSU doesn't have enough power?

I'm at a loss as to what else to try. In the meantime until my parents arrive with my old system.

Anyone have any ideas?

Ps. I asked the to check the PSU wattage and got the usual response "check the what with the what now?".

Would I definitely need a 2nd gpu to test?

 

[helpstar]

try reflashing your BIOS with the flash bios button

View: https://www.youtube.com/watch?v=iTkXunUAriE


eventually replace the BIOS battery

 

[gazza1988]

I will replace the battery first. I have some somewhere.

As for the flashing of bios I'm going to have to have a think on how to transfer it onto a usb stick.

I suppose I can wait until tomorrow and if the gpu works in the pc I can transfer it over.

Alternatively if I can find the adapter than came with my phone to turn usb c into micro usb I have a memory stick that has micros usd as well as type A. That could work too.

 

[rickypicky5]

Your PSU has a 5 year warranty. I'm not saying that's the problem but it is a possibility.

 

[gazza1988]

Your PSU has a 5 year warranty. I'm not saying that's the problem but it is a possibility.

I didn't realise that. I assumed it would be a standard 1-2 years.

I think I just need to get this computer off my parents (it's been sat for 4 years in a spare bedroom) so may not be in much of a state anyway.

Hopefully I've over stated the wattage and got a large power supply. If so I can connect it to my current rig and see if it works.

 

[gazza1988]

So my parents dropped my old computer off with me.

It has a 850w PSU so that's fine (I know I went ott but not that much!)

Findings are as follows.

Gpu in old pc. Gpu outputs an image. Allows me I to bios. There's no hard drive in it so can only get that far.

Moved cpu, 24-pin mobo connector and 8 pin vga cable from old pc in my current one (not messing about rerouting cables). SSD wouldn't get power but it's a data drive the m.2 is straight onto mobo so will get power that way. Same issue. Vga light on and no output from graphics card.

So I guess that leaves 2 options. Either bios has corrupted as @helpstar suggests to re flash it.

Or the motherboard has gone.


I will say there was alot more "play" in the pcie on my current motherboard. When I inserted the gpu into my old gigabyte motherboard it stays in position. Putting it back in my system it sags a bit and I have to hold it in position or it covers the screw hole to keep it in position. Not sure if that's normal or not though.

 

[gazza1988]

This helped. Flashback fixed my issue.

I think the cmos battery replacement probably helped too?

Thanks you @helpstar