MSI 694D Pro AR Single Cap problem

[DeadCap]

Hi there, new to the forum but i have read lots of post time ago. I'll bring you a very special Post after i solve this mobo issue.

Hope Bushytails the 694d expert can help me.

I'm another MSI 6321 owner, i have ver 1.0. When i first bought this board it had most of its caps vented so i replaced them as follow:

Stock Caps / Replacement Cap
6 Chhsi 6.3v 1000uf => 6 EA (they have a tri-star logo) 6.3v 1000uf.
6 Chhsi 6.3v 2700uf => 6 Nichicon 6.3v 2200uf
4 Teapo 10v 1500uf => 4 L X F 10v 2200uf

Then i turned the pc on and the board was running flawlessly, it was very stable, the recap was successful! there was only one thing, the borad has both proccessors installed (2X PIII Coppermine 1 ghz/133fsb/256kb L2/1.7v) but system was only booting with one proccessor, at first i did not need the second proc so i continued use but today i was going to use the second so decided to fix the board. I took a few minutes to examine it and discovered i forgot to replace the only 6.3v 1500 Tayeh cap the board has. So i replaced this one with a nichicon 6.3v 2200uf.

After i turned on the pc it goes to post but it gets freeze and the only message it display is: "Proccessor (Pentium III 1000 Mhz)" and that's it, i get to this point every time i turn on the pc. I tried restoring with the original tayeh cap but still get the same message, tried also with other caps but still the same.

I have tried everything, both CPU's are fine, i tested them on another board. Don't know if i did a bad recap job specially in the back of the board. Can someone send me a photo of the back's mobo specially the tayeh cap zone to see if my results are the same as the right ones, i mean to make sure i did not left this cap doing contact with another circuit of the board.

Hope someone can help me.

Thanx for your help and sorry for my bad english.

[Per Hansson]

Re: MSI 694D Pro AR Single Cap problem

All I come to think of is that a left out cap would be bad news for the CPU, it would get allot of ripple current and could die, but since you said you have tested the CPU separatley I have no idea...

[tazwegion]

Re: MSI 694D Pro AR Single Cap problem

Are you able to get into the BIOS, and if so are both CPU's recognised there?

Not a productive thought... but would running a dual CPU system whilst it only recognise a single processor be detrimental to the components in any way?

[gonzo0815]

Re: MSI 694D Pro AR Single Cap problem

Does the board work with one cpu or it is completely screwed up?
in any way, your replacement caps are somhow strange to me, are those real low esr caps ? And how about those EA caps? I think some reputable and branded low esr caps would had been a better choice to rule that out.

[Rainbow]

Re: MSI 694D Pro AR Single Cap problem

What about this https://www.badcaps.net/forum/showthread.php?t=278 ?

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

Hi, thanx for your answer. I repeat, both CPU's are fine, both of them work in another motherboard. I'm not able to enter the bios, i can only see post messages:
-GreenEnergy or something yellow Logo
-The award bios message at the top
-The bios rev. also at the top.
-The board specs at the bottom.

The first message a pc shows at post is about the cpu. I get the message: "Proccessor (Pentium III 1000 Mhz)" and then it freezes when it should print to screen
"Proccessor (Pentium III 1000 Mhz) (2 X CPU)" or 1 cpu and then continue to proccess other threads.

I agree that running a dual proc. system that recognizes only 1 when both are installed can be harmful for the components but this was not the case, the second cpu as it's not being recognized is acting as a AGTL+bus terminator.

The EA caps are new to me, they are green, they are almost equals to the stock chhsi 1000uf, don't know if my rep. caps are low esr, but they run pretty acceptable.

About the famous C390, this was installed backwards by default, i mean, not according to PCB so i replace it and left it backwards as it was.

[gonzo0815]

Re: MSI 694D Pro AR Single Cap problem

Well, we are not asking if your cpu`s are ok, we are asking if your board will runing fine with only ONE cpu, or if it will have the same error like with 2. Your answer could be some food for our brains to give you some more suggestion where the problem could be. In any way, recaping with unknown caps and with the possiblility of non low esr caps could easily lead to a vrm unit not working properly or not to be able to put out the ammount of power i should or with to high ripple current. Therefore if the board is running fine with ONE cpu, may be it is a cap or recapping related issue. If not, may be there is something else screwed up.
have you tried usuall trouble shooting steps like clearing cmos etc. alreay? if not i think you should do now. And may be you have broken anything ales during handling. best advice is to lock for scratches and examinate your soldering points with a magnifying glass.

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

Right now the board does not work with 1 or 2 cpu's, it has the same error always. I tried clearing CMOS and all that troubleshooting steps, just left to try replacing the battery and tonight i'll try with a new 450w PSU.

I looked the board backwards for scratches but everything is ok i took a good look at soldering points, they are fine but i have doubts about a few ones, i think i added to much stain and posibly i made contact with a circuit, i removed and fixed these points but there's one imposible to remove all stain and is our old friend (the back point of the tayeh cap). Thats why i need a photo of the stock board from the backwards, to see if this point is not doing contact and to see how it should be by default.

I turned the pc on after trying to fix soldering points, voltages are ok but still get the same error. I measured voltages of the tayeh cap, i get variable and descending voltages, first i get 10 but then it starts to low down very slow and gets around 6.5.

[davmax]

Re: MSI 694D Pro AR Single Cap problem

I turned the pc on after trying to fix soldering points, voltages are ok but still get the same error. I measured voltages of the tayeh cap, i get variable and descending voltages, first i get 10 but then it starts to low down very slow and gets around 6.5.

This sounds really bad. That is the characteristic of an open circuit, a lost or broken connection, I hope it is not in one of the internal layers of the motherboard.

[gonzo0815]

Re: MSI 694D Pro AR Single Cap problem

The only thing i was doing in that case is using a lot of flux and heating the solderpoint realy until all solder is melted. Obviousely, if you soldering equipment isn`t that perfeckt like mine, then this is a very demanding situation for the caps. But any way, the only option to get ride of to mutch solder making contact or an not realy filed up via.

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

the only option to get ride of to mutch solder making contact or an not realy filed up via.

I think both cases are present in my board. I'll try to post a picture of the soldering point of the tayeh cap so you can evaluate if is doing contact with the circuit.

Ah! i almost forgot, sometimes i get an electric shock when i touch the board at certain points, it's a very small shock anyway so that makes me think there may be flux doing contact because all points are well soldered.

[tiresias]

Re: MSI 694D Pro AR Single Cap problem

Ah! i almost forgot, sometimes i get an electric shock when i touch the board at certain points, it's a very small shock anyway so that makes me think there may be flux doing contact because all points are well soldered.

Well flux should be always non-conductive... what do you mean by "certain points"? Just the earthed areas/ie. those connected to the PSU's "Ground"?

If your PSU/case isn't on a grounded socket this is quite normal...

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

If your PSU/case isn't on a grounded socket this is quite normal...

I'm testing my mobo in a table to avoid any kind of contact, so the whole pc is on a table...is that what you mean with not grounded socket?

[Per Hansson]

Re: MSI 694D Pro AR Single Cap problem

No, he means if the wall plug has a ground wire or not, and if it is correctly connected to ground itself...

When you say shock I get nervous, you do realize you need to use a ground strap when working with PC equipment? static electricity kills computer components

A shock below 5000v will not even be felt but a shock as small as 100v will be damaging for PC components...

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

Guess what. The wall plug has no ground, do you suggest to use a cable with ground?
I'll try to be more careful when working with PC components...photos are coming!

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

Here's a photo i took of the backwards. If someone can answer the question that's in the photo, please can someone can take a look at the back of your board to have the answer.
Is this point causing the issue?

Thanx.

Click on the image to get a better picture.

[DeadCap]

Re: MSI 694D Pro AR Single Cap problem

If someone did not understood the question: I want to know if the tayeh points should be sourrounded by the dark green pcb circle (isolated). That's it, it's very clear.