PC Fails to Boot, Fans Operate, Screen Stays Black: Motherboard or Processor Issue?

Hello,
I have a problem with the computer, it is about diagnosing whether the motherboard or the processor.
After pressing POWER the fans start spinning but there is no action on the monitor.
Action taken:
- I connected another new, good, functional power supply
- I removed all unnecessary devices FDD HDD CD-ROM, USB, etc.
- I pulled out the RAM bone - no changes
- BIOS reset
- I took out the Processor - no changes, no visible signs of damage or discoloration
- I cleaned the dust from the motherboard
- I unhooked all the LEDs and switches
- no visual changes on the board (OK capacitors)
I eliminated all the additional devices and there was a processor or a motherboard left, but I don't know how to make sure which of these components is screwed.
Please help.

And one more graphic integrated on the board.

Correct linguistic sloppy in your statements! There is a button "Spelling" Regulations point 8.1, 15. [DriverMSG]

You didn't mention anything about the graphics card. You eliminated her damage?
Edit:
Maybe you have a damaged monitor? Monitor cable?

The monitor is definitely OK

Hello

In order to find out if the processor is damaged (or functional), you should install it in another working board with the same socket (socket) after making sure that the given board supports the tested processor.
However, you have not written what equipment you have.

Well, here is the problem because it does not have a second such disc.

From the description of a colleague it appears that the motherboard or the processor may be damaged. I think so too and I bet 50% to 50%. I don't know anything about the motherboard and the CPU because the fortune-telling ball has lost its properties and is undergoing regeneration.

What data does a colleague need?
I will write it

Added after 1 [minutes]:

The computer had been in operation for about 2 years before. So that the components were well chosen.

what plate model? what CPU? also write something about the power supply. Is the Southbridge hot?

Data
Main board: Gigabyte GA-M55plus-S3G rev 2.1
Processor: AMD Athlon 64 bit
Power supply: Modecom Feel 350 ATX was also used for testing Modecom Premium 500 W (new)

Added after 7 [minutes]:

Sorry Processor: AMD Sempron

Again, the question: is the Southbridge on the slab hot?

No, it's not even warm

A question for everyone, of course? So my answer is, my sternum temperature is within normal limits.

kodd wrote:

A question for everyone, of course? So my answer is, my sternum temperature is within normal limits.

Right, I should ask the author the question, but as you can see he figured it out, since the problem is with his album.

Hello.

I have an identical problem - I even created a separate topic, but when I saw this one, I deleted mine and decided to paste its content here.

The problem appears as follows:
The computer turned on in the morning, suddenly crashed and never fired again.

The processor is an Intel C2D e8500, theoretically quite resistant.
The motherboard is a crap Gigabyte GA-73PVM-S2.
The rest of the components are rather unimportant.

After turning on the coolers go on, but nothing appears on the screen, only the magic inscription "No signal". Nor can I hear any sounds from the system speaker.

The first thing I checked was a different monitor and graphics card, unfortunately to no avail. My graphics and hard disk have been tested in a different computer and they work fine.

I checked it then, leaving only the motherboard, processor, cooler of course, and power supply. There should be some noises from the system speaker signifying no RAM, but I didn't experience anything like that.

I checked it on another, working (good) power supply, unfortunately the symptoms were exactly the same. I excluded (I don't know if it was right) so all the elements except for the motherboard and the processor.

Honestly, I hope that this is a motherboard ... I will also add that the north / south bridge (as far as I know they are under one heat sink) heats up a lot after "starting" the computer. Everything would be correct, but I do not want to buy the motherboard blind. The capacitors look like new, they are not swollen.

I must admit that the processor had a bit high temperature from the beginning (I suppose that the cooling was poorly installed by "specialists"), but they were not tragic.

I searched half the internet, but no "tricks" helped.

Anyone can say unequivocally whether the processor has been damaged or the motherboard has been damaged? Or what else should I check? (There were probably more tests than I wrote out, but I don't remember everything)

One more question, maybe someone knows, namely, how does the motherboard behave with the processor removed? Are there any sounds from the system speaker?

I would like to add that nothing was overclocked, no elements were changed, the computer was working and suddenly it stopped.

The bios settings were reset (with a jumper), nothing helped.

EDIT:
As you can see in my case, the bridge is warm. Does this clearly indicate its damage? It seems to me that it shouldn't get so hot when booting, its load is (probably) minimal.

My processor is 4800 X2 and the board is a gigabyte with a red-hot bridge:].

I had problems with cooling the prock, and my son did not know and played the game. In bios, I previously turned off the processor protection, so that it does not reset.
My son was fighting a game, when I entered the house I immediately dropped the Alt + Tab game and on the HWMonitor program I saw 112 * C for a while and then the computer turned off. After talking to him, I found out that his computer had turned off several times before.

So, without protection in the bios, you can not burn the processor anyway! It seems to have something built in, some kind of internal security. Also, in order to burn prock or damage it, you have to really want.

in your case, I would estimate a processor 20% - a motherboard 80%.

I used to have similar symptoms with my gear, but back then it was due to bad Bios flashing! Actually, a break (someone turned off the acne just then = bad luck). There were fans on the disc, discs turned on, etc. But there was no picture or "beep" of the bios.

Tell me, does this unfortunate heating bridge finally indicate that it is working or not? I've already lost myself ...

Anyway, it turned out that my motherboard is still under warranty, so I contacted the service as soon as possible. The service technician, to whom I presented all the knowledge I was able to gather on this subject, stated unequivocally that the motherboard was damaged. I do not know if he had any reason to say this (although the processor is actually hard to kill), but that's not my problem anymore. The CD is packed and shipped, we'll see what they find on the spot.

That's nice - I have the same !!! I have unplugged everything and there is still no signal to the monitor and the bios does not want to start ... I will say this - it started to do in stages - it could not be turned on so immediately you only had to press "reset" 5 times to restart! And finally, after such a click from the speaker sys, it was known that it restarted and fired ... Yes, I used it for 5 days before it died ...
I think that the board or the power supply ...

Fortunately, I have a second computer to diagnose the defect and I swapped power supplies with it, i.e. I gave a good computer a power supply from the damaged one ... The system fired .. maybe 2 minutes, after turning it off and twisting the screws, it did not start again !!! On this older motherboard I have a display with post code and it shows after firing: FF, C1, AA ...
And again the same fault on the second computer ???
Unfortunately, I missed the instructions from this Epox 8RDA + board (because it is an older computer), but I read on the Internet that someone had exactly the same "AA" code - unfortunately the problem is not explained ...
I think I'm afraid to say that I destroyed both computers with
this probably damaged power supply !!!

I gave the old computer back the power supply that was in it and the same ..... probably the board fell under the influence of that power supply - is it possible ???

Maybe someone cheer me up because I'm breaking down slowly ........
The "damaged" power supply had good voltage for 12 and 5V drives, but it is not known what it is for the motherboard?

An additional symptom of this damage is the PWR diode which shines half a whistle ... a bit weaker practically imperceptibly ...

I can see that the topic is quiet a bit ... maybe my answer will help.

The motherboard returned from the warranty, but unfortunately no one bothered to write what was fixed Anyway, I see non-original February under the bridge (not under the heat sink, but on the other side of the board) and some traces of a hotair.

Perhaps they just burned the bridge from the bottom without replacing anything ... it won't hurt to try, and I suppose it can help at least temporarily, so if you have the right equipment, let's do it :)

PS. Haven't checked the board to see if it works yet, but I think they checked it before shipping

Ok, my solution is this: a whacked processor.

After some time of my intense rummaging, the computer started to turn on but only after resetting the bios. So I closed the jumper, the computer turned on the minimum bios settings, then I set the bios to restart and the computer did not start anymore. Of course, I checked all the bios settings or ok or the processor well detected and stuff, but it did not help all the time.
Finally, the processor was replaced with a new one, and everything is fine. The old processor did not work at its nominal values.

A simple procedure that lasted 15 minutes helped me in the same situation. I got into the RAM memory, I took them out of the slots, I blown the slots with compressed air, I put the frames in, closed the casing, connected the cables and started up no problems (I mention that the computer is 11 years old)