My hdmi and dvi ports are not working anymore!...

"I bought an HDMI/DVI interface to connect it next to it, but it's the same".

What do you mean by that?

Finally, please tell us the composition of your PC or the brand and model, if it’s a branded PC.

--
To misname things is to add to the misery of the world (Albert Camus)

Hello Pilam,

Can you tell us what happened just before the incident? I'm specifically thinking about a component change or a physical shock to the machine.

So there's a light next to the HDMI port on the graphics card, that's strange. Can you tell us a bit more about the machine's configuration?

Hello,

I no longer have display on my PC

It's silly, but as far as we're concerned, "my PC" has no meaning!!
As epango rightly points out, when asking your question, it's highly recommended to indicate the exact references of your machine, the operating system installed, and its version.
Please complete your question.
Best regards.

--
The one who doesn't bring joy when arriving always does when leaving.
O Breizh my land, I love my land!

Hello again, I completely agree I wasn't precise enough but I don't have much information.
ASUS (I don't remember the specs, and I didn't print it…)
I see the red light on top of the card (side panels of the transparent case). GEFORCE GTX 980 "classified" card.
That's exactly it Shiftou_035, I was indeed talking about an HDMI/DVI adapter going from the screen to the DVI port of the card, instead of the HDMI port to see if the problem was coming from the port. But it seems to me that DVI = analog, I should have thought about that beforehand.
The first "weird" signs are crackling/buzzing in the subwoofer when I went to a gaming site and the computer shut down... (coincidence?) afterwards, the screen kept going blank (asking HDMI? Analog? and so on). When I pressed (without holding) the switch, the PC would shut down immediately.
Just in case, I removed and reseated the memory modules. Since that operation, it boots completely, at least I think so, and I also checked the connections, fans, etc. Don't laugh, I don't know much about this :-)
If I could send a photo it would be clearer. Thanks again.

Yes, you're right, but it does the same thing with the HDMI port on the motherboard; the screen doesn't detect the port and keeps offering HDMI, analog, HDMI, analog, etc.
It might not add anything, but it's an ACER and not ASUS. (Even there, I made a mistake...)

On the motherboard I have:
1 HDMI
4 USB
1 ethernet
and 3 jacks for audio

on the graphics card:
2 DVI
1 HDMI and another one that looks vaguely like a larger HDMI.

I tried it only once when I moved the RAM sticks - I'm going to test it again - thanks a lot for your help!

Don't you have any reference for the PC written down somewhere? Neither on a sticker attached to it, nor on an invoice?

--
Misnaming things adds to the misfortune of the world (Albert Camus)

Hello epango,
nothing much to say and I no longer have the invoice, it was a second-hand purchase at EASY CASH - it's been about 5 years... Not easy!
on the front:
DARK TROOPER
labels:
nvidia geforce
intel inside core i5
samsung ssd activated
I noticed one thing that has changed with the breakdown is the beep at startup:
before it was the short and high-pitched beep of the DVD and now it's a deeper and longer beep (about 3s) coming from the back - maybe the motherboard?
I took out and repositioned the graphics card but it doesn't change anything.
thank you!

Thank you glg29,
I must have not reseated a RAM stick properly.
That's fixed on that side.

no, it's just
only the beep that had changed. I thought I had a small clue, but no, it's probably me who messed up by reattaching a stick incorrectly...
I still don't have a display. However, I found the invoice or rather the detailed receipt of the various assembled components.
acer aspire tc-605 with 8GB of RAM
gtx 980 evg graphics card
I'll spare you the monitor/keyboard/mouse/discs.

Yes, maybe it was replaced before I bought it in 2016 - I think the assembly was done by Easy Cash (as I have the receipt for each item) and they decided to put in a GTX 980 - it was still working until last week.

It's back up and running!
I just realized there was a tiny piece of nylon thread
that was preventing the graphics card from being fully inserted. I couldn't see it from the angle I was at. It must have come from an old tie used to hold the cables together, but it had been there since it was installed.
Still, my tower stays in place; I hardly ever move it, just to give it a quick vacuum, but that was enough to interrupt the connection.
Anyway, thanks a lot for the help and the interest shown in my problem.
Catch you later!