I think I have bad caps

[behrk]

Hi:

I have an Intel D865PERL motherboard which is not booting any longer. It is out of warranty. So, intel is not accepting it for RMA.

When I power on the computer, fans, motherboard light, power LED all turn on. However, TV output does not come. There is no beep, no post.

I first thought bios could be damaged. I tried to do bios recovery but computer can't access to the floppy drive. Interesting thing is that boot damages the floppy. So, I am not sure if the problem is just capacitors. I tried to do USB and CD recovery but they did not work either.

After I turn on the PC, led on the DVD drive comes on, but then I can't eject the tray. I can't use the power or reboot switches.

I took the video card and memories out and there was still no beep. So, it looks like motherboard can't reach to that stage.

I took out the battery out and put back. That did not help either.

I lifted the motherboard to see if there is any short circut, that did not work either.

I have another board. I moved the components to that motherboard and everything worked. I moved the things from that motherboard to this one and they did not. So, my conclusion is the motherboard is bad.

I looked at the motherboard. It is very clean. I see no damage, no burn. Except the capacitors at the back of the CPU. There are 5 capacitors, there is a brown residue at the top and the top of them are popped up. And, that part of the motherboard smells more acidic. I attached the picture of the caps. These are bad capacitors right? They have X
at the top of them. There are two more capacitors look similar on the other side with K on them and they look fine.

I searched the internet and I found that this problem is common in D865PERL motherboards.

Now, I am thinking to replace the caps. However, I am hesitating that even if I replace
the capacitors, motherboard may not work. I do not have any soldering tool. So, I would be wasting money.

What is your feeling? Do you think only capacitors are bad? What bothers me is that if I put a floppy into drive, floppy is damaged. Also, my DVD drive locks up. With bad capacitors do you get these symptoms?

Thanks.

[kc8adu]

Re: I think I have bad caps

those are bad.
iirc intel was replacing badcaps boards for a while no questions asked .
maybe talk to someone else at intel?
if not i would replace those and any others like it on the board.

[behrk]

Re: I think I have bad caps

I called Intel twice. Customer service does not sound like familiar with the problem. They keep saying the board is out of warranty. I think they are trained to refuse.

I can "attempt" to replace the capacitors. I am curious if any other component is bad. If people had similar symptoms like I did, I would be more comfortable.

When people had bad capacitors, did this effect other components such as floppy, IDE, PCI, AGP controllers? I am reading that some had their mosfets burnt around the capacitors. I do not see that problem.

Also, I tried to clear my bios 3 times and each time the floppy media was damaged.

The thing is I need to buy all the equipment which will cost me maybe $40. If I am sure that this would fix the problem, then I would. But, if it does not work, it would be better to get another motherboard. But, I like this motherboard.

[Sparky]

Re: I think I have bad caps

really all you need to recap are new caps and a basic soldering iron (plus a little know-how). Where do you live? I could recap it for you if you don't want to mess with doing it yourself. I might even have some spare caps of the right type here, what are the voltage and uF ratings?

As far as the floppy disks getting damaged, that could just be a fault of the drive itself. They certainly aren't bulletproof things that's for sure.

[behrk]

Re: I think I have bad caps

I did not take the caps out. But, I think they are Nichicon HN(M) 6.3V 820uF A0315 105C.
They are 8mm wide, 20mm long.

I soldered in the past. Although this does not mean I can do it again.

I am around Los Angeles. I am afraid you are located at Ohio.

Floppy drive works on my other motherboard. Media is getting corrupted. But, computer does not even attempt to read the floppy. It is like something is short circuited. I elevated the motherboard and tried to boot like that to see if that might be the problem, but no.

[behrk]

Re: I think I have bad caps

What replacement should I use for these? Does it matter if it is 6.3V 1000uf or 10V 1000uf? Does the height of the capacitor matter?

[gonzo0815]

Re: I think I have bad caps

Usually there is no voltage between 6.3v and 12v in a typical PC. So it does not mater if you take an 6.3 or 10v cap.

As long as the high dos not interfere with any components, it is not critical.
The more important thing is the diameter, which should be maintained, as the lead-wire spacing depends on it.

[behrk]

Re: I think I have bad caps

Does the height matter? I see two capacitors with the same characteristics e.g. 10v 1000uf 8mm diameter but different height, 11mm and 20mm.

[MixMasta]

Re: I think I have bad caps

Height doesn't matter, as long as it fits.

Height would matter if say you were replacing capacitors around a pci slot and the caps were too tall and hit your video card or something like that.

Here is a good caps list... https://www.badcaps.net/forum//showthread.php?t=2280

Personally I would replace them with Panasonic FM caps from digikey.com . Though you could also contact Topcat, the proprietor of this website, and he can supply you with whatever you need.

You will want to replace all the caps of the type that are failing, even if they aren't bulging. Also, you would be smart to open up your power supply and check for bad caps while you are at it.

This may be a bit much if you are new to all of this... you might be best off sending the motherboard to someone (Topcat or someone else on this message board) or just biting the bullet and buying a new motherboard. Good luck!

[behrk]

Re: I think I have bad caps

Repair will be costly. So, I will try to order and do myself.

So, I will either get Panasonic FM or Rubycon MCZ 10v 1000uf.

[linuxguru]

Re: I think I have bad caps

Go with the MCZ, say 1200,1500 or 1800/6.3. Some failures with the Panasonic FM and Chemicon KZG in high-ripple current, high-temperature locations have been reported earlier.

[Super Nade]

Re: I think I have bad caps

Another alternative would be the LXZ or KMG (maybe even KY-->SMPS, if you can find them) series from Chemicon. Not a single failure in two years from the boards I fixed.

[starfury1]

Re: I think I have bad caps

if you haven't soldered before (or very little)
Make sure you check the FAQ's here and if you can, go dumpster diving for some junk PCB's (preferably old MB's) to practice on
its not hard but does require a bit of skill if you dont want to make a mess of it
(as above)
make sure you learn the Needle Trick to clears hole, its just makes it easy that way

https://www.badcaps.net/forum/showthread.php?t=485

check posts on irons too as I am guessing you will want a cheapie.
(like a rat shack type don't know what mouser or digikey have to offer in the way of a cheap iron that would do the job)

if you got further questions then post ok

Its not hard, with a little practice and a little care
(plus the right iron)
You should be able to DIY and effect a working repair

https://www.badcaps.net/forum/showthread.php?t=4050

might inspire you...(err yeah battery and cpu remove)

yeah, I would check the psu too or lest wise post what it is.
(maybe get a cheap digital Multimeter while your at it, better then nothing)

HTH

Cheers

[behrk]

Re: I think I have bad caps

i read the posts regarding soldering and capping. although, reading is entirely different than doing.

i will go with the MCZ or FM. i will check the prices.

[behrk]

Re: I think I have bad caps

i forgot to ask. people are suggesting to use wrist strap. is this attached to my wrist or the motherboard? i am thinking getting 60w weller iron. i think it is grounded. do i still need the wrist strap?

[PCBONEZ]

Re: I think I have bad caps

Intel support not familiar with the issue?
~~ Try again...

http://www.intel.com/cd/channel/rese...tes/193414.htm

.

[PCBONEZ]

Re: I think I have bad caps

These were affected by the Nichicon HN and HM problems.
Those are the only caps you should need to replace.

[PCBONEZ]

Re: I think I have bad caps

HM is rated about like MBZ
HN is rated about like MCZ.

FM ESR/Ripple ratings are a step down from HM and MBZ, (although Intel probably over-killed the ratings because HN and HM were less expensive at the time).

.

[behrk]

Re: I think I have bad caps

Intel support not familiar with the issue?
~~ Try again...

http://www.intel.com/cd/channel/rese...tes/193414.htm

.

Thanks. I did more search on the internet on this issue. I sent all the references to Intel. A few back and forth and they accepted to repair the board.

The problem is they said they need to sent it oversees to fix it and it may take upto 90 days.
That would mean I won't get it before Spring.

[PCBONEZ]

Re: I think I have bad caps

Did you happen to mention the issue was in public forum?
That often adjusts their attitude a little.. LOL

It's your choice if you want to DIY or have them do it.

Sounds like they are sending it to the original (actual) manufacturer.
- I've heard that is Foxconn but I've never been able to confirm it.

.