[Solved] The computer is running, the monitor does not display the image. No bios sound

Hello, I have a problem with a computer, actually two. A few days ago after trying to turn on the computer, I noticed that the monitor was not going to sleep, and the bios did not emit a characteristic sound when turning on the computer. I didn't take it too much because this situation had already taken place and it was good after a while. Now, however, the situation does not change, I found that the motherboard probably fell and hence this problem. I bought another computer, before checking it with the person from whom I bought it and everything worked beautifully. I came back home with a new computer and how great my surprise was when the situation repeated itself. I found that the monitor probably broke or there is something wrong with the cables. I bought a new cable and nothing else, I borrowed a monitor from a colleague and the same. I have no idea what could be the reason because if in the old computer there could be a failure so new I checked the seller 2 hours earlier and everything worked as it should. What could it be? I am asking for help and thank you in advance.

Hello.

Hmmm ... honestly, from my point of view, there can be two problems:
1) Or in both computers you came across "low-voltage" power supplies and simply pulled your equipment with you, but you would have to have an amazing "luck".
2) Is something accidentally happening in your electrical network ... Looking at the described problems it would not be abnormal ... Maybe something on the network is wrong, or at least only in this one socket / extension cord ???

EDIT:

FactoryRSV wrote:

I bought another computer before checking it with the person I bought it from and everything worked out beautifully . I came back home a new computer and how great was my surprise at the time the situation happened again .

The more I would look at point 2 above.

Yes, I think something with the network, because when it comes to power supplies, I bought one for the old computer and there is every xfx pro550w which was more than enough for the needs of this computer and the other, as I mentioned earlier, I checked the seller 2 hours earlier and everything worked as it should . I will take computers to a friend tomorrow and see if they work there. The more I wonder that once I had a similar situation and I did nothing about it because the problem disappeared after a short time.

Or maybe just for a good start try to plug this PC into a different outlet? Eg where do you have a TV, radio or other equipment? And the knife can move. If you would check, let me know.

I just checked it in the second room where the TV, radio, etc. are connected and the situation was the same. But is it possible that inferior power is being supplied at a given moment? It would probably have an impact on everything and all other devices also work.

FactoryRSV wrote:

I just checked it in the second room where the TV, radio, etc. are connected and the situation was the same. But is it possible that inferior power is being supplied at a given moment? It would probably have an impact on everything and all other devices also work.

Well, "worse quality electricity" may not ... Possible energy disruptions. But the fact is interesting. And certainly abnormal, especially if once there were such "flashes".

It is worth checking it out with a friend, because either you are unlucky with power supplies, or you still have to look for the problem on your network.

And finally, such formalities - the cable from the power supply is not damaged? Before turning on the computer, did you do anything on the board itself (removing the CPU, GPU, cables, etc.)? And do you have on the power supply ON instead of OFF (you'd be surprised how many times I've seen such cases ... )?

I am not a specialist but I am not such a layman so hehe. I didn't tinker anything, I didn't remove anything like after switching off the computer when I bought the cables at my place and the same effect as with the previous computer. I checked both in both rooms. I also checked the cables

At the moment it's hard to say something more since 2 hours before this situation the PC would get up and operate normally. Check with a friend tomorrow and let me know what's going on there.

I even bought one connecting the graphics with the monitor to eliminate suspicions. Power I tried with 3. Computers turn on but the bios does not peak, which is not going further. In both fans work, the motherboards also because after disconnecting the pikaja RAM in a characteristic way.

And what power supplies do you have in these computers? All in all this should be my first question ...

Keyboard, mouse and all other things, disconnect and turn on the PC. The inbox will be squeaking?

One is xfx pro 550w and the other is fujitsu siemens 300w. I tried on mouse keyboards etc. but also on the power supply and the same effect.

If you have ruled out everything else, there is only the risk that you have a damaged component that kills your equipment. What did you connect to your new computer? I assume the monitor, mouse, keyboard but did you move anything else from the old to the new one before the first start? It's such a logical, not magical deduction - if all options are exhausted, it will be possible to accept that it's bad luck.

Problem solved, I took a new computer to a friend to see if it would work. Fortunately, he had a different cable connecting the graphics and the monitor. In a non-pci-sense, only the second one doesn't remember its name. I have connected and everything works beautifully. At home I connected via a pci-e cable and didn't come up with the second option because my monitor only has a pci-e input. I had an adapter at home so I connected it to the cable, and everything is fine. Thanks

I do not know if it is a bios or graphics card settings but it was set to transfer from graphics to the monitor using a second connector. In a sense, I don't pay for the other one. If not for the fact that the friend had the cable with the latter option, I would probably still be looking for a solution. Thank you all for your help