Is that chip from defected series ?

[primoz1]

Hi again. I got mboard from HP 6720s with LE82GM965 and after reball it just restarted again and again, no picture. So I think that chip is from defected serie, is someone familiar or know where I can see list of defected serie's ?

I suspect this, because till now I got like 40 similar problems with that chipset, but sometime even if I reball work like new, this is confirm my suspicions I think


Thank you for all infos.

[mockingbird]

Re: Is that chip from defected series ?

Never heard of any problems with the GM965.

[primoz1]

Re: Is that chip from defected series ?

Hi. You not have problem with this chipsets or with reballing them ?

thank you.

[mockingbird]

Re: Is that chip from defected series ?

I have never re-balled them.

Re-balling is not only done with defective chips, but also when you want to change the solder from Sn to Pb/Sn. Depending on the quality of the solder balls HP's manufacturer used at the time, that may have caused brittle joints.

I think the manufacturers have settled on an alloy now it isn't such a big problem anymore. But to answer your question again, no, I've never heard of anyone talking about defective batches of GM965 chipsets, nor have I ever heard of one needing to be re-balled, but I am not ruling it out.

(If it was in an Acer laptop, I wouldn't be surprised. Acer was known to use boards with an inferior lead-free alloy).

[trebo]

Re: Is that chip from defected series ?

it just restarted again and again, no picture.

seen this happen a few times when Cpu bad

[primoz1]

Re: Is that chip from defected series ?

I Is HP 6720s and it show BSOD's on start, after reflow he work 99% OK and sometimes make problem on start, make check disk, and after this work OK. but tomorow morning cryptdll.dll is missing and not complete start sistem (just show black screen and mouse pointer), I got fresh .ddl file from other computer and put on disk, and then work OK. but with test runing 20 allways got error on 9 minut, so I deside to make reball (is think it help) and now is what is

So I wonder is maybe bad serie of this chip like nVidia, because if I make reball it be like 98% will never work again, if I just make reflow has better results.

Intel say this abot reballing intel BGA components

Re-balling BGAs Not Recommended
Removed BGAs should be discarded. The re-balling process (placing new balls on removed BGAs, so
that they can be re-used) is not recommended, for these reasons:
• Many BGAs (including Intel BGAs) are rated for three soldering cycles.
o Re-balling exposes BGAs to more than three soldering cycles.
o (1) Initial installation, (2) Rework/removal, (3) Ball attach, and (4) Final installation.
re soldering cycles.
o BGAs used on double sided boards could have even more soldering cycles.