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**etnietering** · 06-17-2010, 05:34 PM

Re: P4SD - case J7X

The IC featured in this picture:

NEEDS a heatsink on it! It's the Northbridge, and will get very hot. Something like this http://www.newegg.com/Product/Produc...82E16835118014 should do the trick. The board seems like it's working until this chip overheats, then crashes. DO NOT try to turn the board on again until this is properly heatsinked. Use some rubbing alcohol to clean off the old thermal grease, and use some new grease (like arctic silver 5).
Also, you'll need some RAM in it for the POST to complete, and a CPU to run anything. The empty battery slot isn't necessary, but it won't be able to remember the time when it's unplugged.

**stj** · 06-17-2010, 06:32 PM

Re: P4SD - case J7X

i assume he took the sink off for inspection / cleaning.

what i dont understand is why company's spend the extra on rubycon's & poly's and still use bubblegum on the heatsink intsead of silver or ceramic paste!

i get loads of boards with that exact chipset, and as5 all of them.

**c_hegge** · 06-17-2010, 06:54 PM

Re: P4SD - case J7X

Two possibilities:
1. the 3 cheapo Teapo caps for the VRM in https://www.badcaps.net/store/produc...products_id=38 (assuming they are 1500uF 16v)

2. Physical damage near one of those caps (suspect area circled)

Attached Files

**kaniki** · 06-17-2010, 11:29 PM

Re: P4SD - case J7X

Originally posted by stj

i assume he took the sink off for inspection / cleaning.

what i dont understand is why company's spend the extra on rubycon's & poly's and still use bubblegum on the heatsink intsead of silver or ceramic paste!

i get loads of boards with that exact chipset, and as5 all of them.

I would say that i might have came off on its own. I have seen a few that have come off by themselves. what i dont get is why not make it so that it can be attached by something other then a glue like substance. if you noticed, there is no mounting holes to put a generic heat sink on that is spring loaded. Another favorite is the ones that have little round staple looking clips with spring steel holding them on.. only problem is that those round soldered in clips come off as the poor solder joint breaks after a few years and then the heatsink falls off. i cant tell how many of them i have seen.. way too many, i can tell you that.

**stj** · 06-17-2010, 11:53 PM

Re: P4SD - case J7X

that board does use loops to mount the sink.

**kaniki** · 06-18-2010, 09:48 AM

Re: P4SD - case J7X

OK you are right.. i missed that. those are the loop hooks that i was talking about that i see quite a few of that come off and then the heat sink just falls off.

**MXM** · 06-18-2010, 01:25 PM

Re: P4SD - case J7X

wow guys thank you, im working on all of the tips!!!

Thanks!!

yeah i removed the heatsink for inspection. i will recap those cheapo teapo.

Im on it, guys Thank you for all the ideas and suggestions, Thank you again...

is it replaceable, the memory controller?? ive never tried that one.......

THANKS, Im on it. Will update asap.

**MXM** · 06-18-2010, 03:09 PM

Re: P4SD - case J7X

UPDATE:

After recap those three teapo cheapo and cleaning that sink, i had no success... out of many random testing, with different combinations between DIMMs, CPUs, heatsinks the best i got was this one successful POST, and that was it, after it i thought i should mount it on its base and since then i got nothing (the base is ok, i unmounted it and same, nada) again.

Any idea, tip, suggestion is very welcome,

Thanks in advance.

This is what I did:

Thanks

Attached Files

**PCBONEZ** · 06-18-2010, 03:21 PM

Re: P4SD - case J7X

Circled caps are in RAM power and appear to be Teapo or OST - both of which will fail without bloating.

.

Attached Files

**PCBONEZ** · 06-18-2010, 03:28 PM

Re: P4SD - case J7X

Originally posted by MXM

UPDATE:

After recap those three teapo cheapo and cleaning that sink, i had no success... out of many random testing, with different combinations between DIMMs, CPUs, heatsinks the best i got was this one successful POST, and that was it, after it i thought i should mount it on its base and since then i got nothing (the base is ok, i unmounted it and same, nada) again.

Any idea, tip, suggestion is very welcome,

Thanks in advance.

This is what I did:

Thanks

That's too much goop!
The goop can short those little resistors or caps surrounding the main IC and fry out the whole chipset.
You want just a skim coat, just enough to cover the IC with a thin layer.
.

**c_hegge** · 06-18-2010, 05:09 PM

Re: P4SD - case J7X

Originally posted by MXM

is it replaceable, the memory controller?? ive never tried that one...

No. The memery controller is part of the nortbridge.

**Scenic** · 06-18-2010, 05:34 PM

Re: P4SD - case J7X

all those P4SD boards you're posting threads on came out of HP d530 SFF computers right?
those with the weird proprietary exploding powersupplies due to the glue getting conductive..

if that's the case, those boards may got voltage spikes when those PSUs went bang..

just a thought i had..

**kaniki** · 06-19-2010, 12:40 AM

Re: P4SD - case J7X

Originally posted by PCBONEZ

That's too much goop!
The goop can short those little resistors or caps surrounding the main IC and fry out the whole chipset.
You want just a skim coat, just enough to cover the IC with a thin layer.
.

he is correct. the same thing should be said for processors too. that is one thing that drives me crazy is when i get a board in that someone puts a huge amount of heat sink paste on and it goes everywhere. another down side to too much heat sink paste is if there is way too much, then the excess that goes over the edges can also do the exact opposite of what it is supposed to and actually more insulate the parts instead of helping cool it down.. I'm talking about the extra stuff that goes over the edge from the part of where you need it.

you want just enough to barely cover the part of the chip where it is supposed to touch the heat sink. A good way to find out the amount, install the heatsink, and then take it back off and see how much has spread over the edge of the chip. If a lot goes over the edge, then you know you have way too much, if very little goes over the edge, then you know you have the right amount and just clean off what was on there and reapply the amount you just had.

Originally posted by SCENIC

all those P4SD boards you're posting threads on came out of HP d530 SFF computers right?
those with the weird proprietary exploding powersupplies due to the glue getting conductive..

if that's the case, those boards may got voltage spikes when those PSUs went bang..

just a thought i had..

You talking about those famous bestek power supply's?

**c_hegge** · 06-19-2010, 01:01 AM

Re: P4SD - case J7X

I doubt they would be worstec. HP usually use delta in their SFF systems

**Scenic** · 06-19-2010, 12:02 PM

Re: P4SD - case J7X

@ kaniki: nope..

http://www.youtube.com/watch?v=EFodprrO48Q
http://www.youtube.com/watch?v=nHPf6jHdEFg

the completely non-standard PSUs they used in those SFF POS boxes had a problem with the glue that was used to hold the components in place before soldering. it dries up, when the PC left unused for a while, the glue sucks up moisture from the air, and when you then plug it back in, it's conductive enough to cause some fireworks like in the 2nd video.. and that's probably what also takes their boards out (voltage spikes through the ATX connector when the PSU dies with that light show..)

**MXM** · 06-22-2010, 03:36 PM

Re: P4SD - case J7X

Hello and thanks for the comments and tips and suggestions.

Yes they all are from (this damn) hp d530 SFF model, all of em. But not all of em came with a blown PSU, some of em came with a working PSU. I have also fixed some of those PSUs that are also a pain in the ass... (got info on that too if someone needs). Thanks for the advise, do you think is there a way to find out if the board is fixable or not? given the fact that now on today i couldnt tell which of those came with a defective PSU (my bad)....

I have removed the excessive goop, but i have to admit i did test the board with the excess on, my bad (x2)... if you think theres a chance its already all blown; just advise please.

I wont try removing that chip then, i guess

Thanks for the advise.

Most PSUs are delta brand. ???

I am still working on this board. No better results.

Thank you ALL

Peace.

**MXM** · 06-22-2010, 04:25 PM

Re: P4SD - case J7X

UPDATE: i have been trying to figure out if the board is still fix-able, since i havent gotten a single POST since few days... any idea is really very welcome

i changed those cheapo teapo close the DIMM slots and finished manual resoldering close the display output. i also reduced the amount of goop to avoid any situation on this issue, in both the cpu and the memory chip.

i havent done a complete manual resoldering, just on the area circled by c_hegge.

the rest of the board should look the same as in the past pics.

pics from today

Thanks everybody for the time and replies.

Attached Files

**PCBONEZ** · 06-22-2010, 04:57 PM

Re: P4SD - case J7X

What other caps are on it?
I see what might be an LTEC and some that, if Nichicon, are in the bad date range.

Any small ones rated for 85C instead of 105C?
[They die young.]

**PCBONEZ** · 06-22-2010, 05:05 PM

Re: P4SD - case J7X

Use a credit card or a doubled up 3x5 card or a piece of stiff plastic [like salvaged from some retail packaging] about that size to get a nice thin layer of 'goop'.

Goop <- hahahaha
I think I started something...

You need a thin layer over the whole surface that looks like machined metal.
That chunk of metal is the heat-sink for the silicon chip inside the assembly.
The point to the, um, 'goop' is to fill air gaps between that heat-sink and the one you attach on top of it so you have as near 100% contact area as you can get.

.

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P4SD - case J7X

P4SD - case J7X

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