I have a problem after assembling the PC, bang and the monitor does not receive a signal

[CoUgSt]

Hello, as the title says, I've run into a problem when assembling the PC in the new case... I've assembled everything as usual, the only thing that had changed besides the case was the cooler and some cathodes that I added. When I turned on the PC for the first time it didn't start, I disassembled and reassembled a couple of things and it started. When I was in the bios it made a loud bang and started to smell like something was burning. The cathodes stopped working (I assume it caused a short circuit or something, what bad luck to have bought them). Now I've assembled the PC on top of the desk without a case, and connecting only the essentials it doesn't work. The PC starts up, the fans turn on etc but the monitor doesn't receive a signal, I've already checked the RAM modules and they're not the problem. Tomorrow I'll try changing the graphics card and the CPU, but before I start I'd like to know your opinions... Since the closest thing that happened to me was when my Tacens Valeo blew up, but in that case the computer didn't start up directly. What could it be? I'm annoyed to have left more than 300€ between the case, cooler and other things and now I'll probably have to make another expense, it's not the time for spending money :angry: Regards

[CNCBCN]

did it make any beeping sound or something? to be honest, it's bad luck i would almost say it's the motherboard (if it doesn't beep) if you have a multimeter, check the FA to see if it gives normal values

[Bm4n]

Well, it sounds like a power supply, but if it's something else you'll see/smell it quickly :risitas: I'm telling you because I just renewed the power supply for that very reason, it may have a damaged power line and it powers on but doesn't start up.

[Sylver]

Petardazo de tipo "chispazo eléctrico" = fuente de alimentación, casi siempre.
I also had a petard of that kind, although it sounds strange to me that it supplies current even after the petard... we might be talking about the board if it doesn't beep as CNCBCN says

Good luck in any case, let's see if tomorrow's tests give you good news

Regards

[CoUgSt]

The whistle does not whistle, and as I said the other time that my Tacens blew up directly it did not start, that's why it seems strange to me... although I will try the source thing first as it is quick and that way I will be clearing up doubts.

Regards

[Nemo]

I suppose you have already done it or you will have thought about it, but I think the best thing is to try, with the power supply of your second signature team, all the components and isolate the problem of the motherboard or power supply and that it has not gone further.

Best regards

[Bm4n]

I, after hearing the bang, like a capacitor exploding, just opened it and saw that the board was fine and I already guessed it was the power supply, I didn't even try to turn it on because if the power supply gives a bad voltage it could fry something else. I recommend the same thing.

@silver the capacitors when they explode sound just like a firecracker, they don't make any special noise.

[Sylver]

@Bm4n:

@sylver the capacitors when they explode sound like a firecracker, they don't make any special noise.

Sorry to contradict you and that it doesn't match your experience, but I have had capacitors explode in motherboards and graphics cards and I have experienced sounds like a firecracker, popcorn sounds, short circuit sounds and even absolute silence on some occasions. The result was always the same, either a bath of acid or popcorn-like lumps. Maybe I'm a klutz or I've had bad luck with old computers but it has happened to me a few times (to my misfortune :nono:)

And well, in my post I didn't talk about capacitors, I was referring to the noise of the power supply when it blows up, that one is more characteristic.

Regards

[Bm4n]

Man, I tell you this because we had the hobby of blowing up components in class and there is nothing electric in their sound, paf and that's it, not all sound the same but I doubt that by the sound you can tell where it comes from. Or maybe you have a super developed ear :chuckles:

[Sylver]

@Bm4n:

Man, I tell you this because we had the hobby of blowing up components in class and there is nothing electric in their sound, paf and that's it, not everyone sounds the same but I doubt that by the sound you can tell where it comes from. Or maybe you have a super-developed ear :smirk:

Wow what a good budget your study center must have had xDD
Man, you don't always know where it comes from, first you hear it and then you investigate, but when you find the gooey mass in a cone-shaped capacitor then... white and bottled milk

Regards

[CoUgSt]

Well, I just finished testing. I had to take a little trip to get the VX550 since the card from the other PC I have here didn't work for me, and after assembling it, it was still the same :risitas:
Seeing that everything seemed to be going well except that the monitor wasn't receiving a signal, it occurred to me to change the graphics card before the micro, and there was the problem… my HD6870 blew up. RMA to the rescue

Best regards and thanks!

[Bm4n]

If it's under warranty that's great, what brand was it?

[CoUgSt]

@Bm4n:

If it's still under warranty great, what brand was it?

Yes I still have it under warranty... it's a Powercolor PCS+, so now I have to put the original cooler on it and talk to the supplier (since I bought it second hand from a kid who bought it directly from a Powercolor supplier, I hope I don't have problems).

Salu2

[CNCBCN]

if he gave you the purchase invoice I don't think you'll have any problems

[Nemo]

So, is the power supply okay? Does the graphics card not have any burst capacitors? Because I think the bang had to come from somewhere and if it didn't come from the graphics card, it might have caused some damage to the power supply.

P.D. I'm glad you found the origin of the fault.

Best regards

[Sylver]

@Nemo:

So, is the power supply okay? Does the graphics card have any blown capacitors? Because I'm saying that the bang had to come from somewhere and if it didn't come from the graphics card, it might have caused some damage to the power supply.

P.D. I'm glad you found the source of the problem.

Best regards

+1

That's exactly what I was going to comment, something must have been affected, probably the graphics card since that seems to be the fault.
Or maybe it was a short circuit in the power supply itself but nothing happened to it, but as Nemo says, it might be affected.

Best regards

[CoUgSt]

Well right now I already have the main PC assembled with the 7800GT and so far everything is perfect, it seems that the problem is only with the graphics card. When I have some more time I will try the 6870 with the other PC, just to make sure it works.

At first glance the graphics card doesn't seem to be broken, although it's also true that the S1 with the fan doesn't let me see very well, when I remove it I will confirm something. Anyway, even if it blows up, there doesn't have to be anything physically broken.

I have a craving for nVidia, so I think a GTX560Ti is going to fall. And if I don't have problems with the RMA (I don't have an invoice, but the guy who sold it to me is a reviewer and bought it directly from the supplier, when I bought it I talked to him and in principle there shouldn't be a problem) I will sell the 6870 they send me

Salu2