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Compaq Laptop Problems

Posted on 2002-06-29
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Last Modified: 2010-04-26
A friend of mine tried to find the source of some rattling in another friend's Compaq Presario laptop (600 MHz).

In the process, they pulled the CPU out of the ZIF socket without undoing the ZIF lever (they couldn't reach that lever without first undoing the heatsink, and they couldn't undo the heatsink because it was solidly adhering to the CPU, of course).

Anyway, upon trying to put the CPU back in once the source of the rattling was dealt with (an obviously loose screw was tightened) the laptop no longer boots.

Friend took apart his own laptop (a Presario 700MHz) and, seeing the chips were similar, stuck his 700 into the 600's CPU slot.  No go.  He then tried putting his CPU back into his laptop, but no go there.

So, basically, two laptops are now nonfunctional, possibly due to zapped CPUs.  I'm wondering if there might be some other solution; assuming that all connectors have been reattached as originally found, is there something about Compaq laptops which causes the machine to never be able to be powered back on if such drastic steps like opening it up are taken (a kind of warranty enforcement; to almost force you to return the laptop to Compaq for servicing)?

Any ideas would be appreciated.
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Question by:Zoplax
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by:WiZaRd
ID: 7119461
"a kind of warranty enforcement; to almost force you to return the laptop to Compaq for servicing"

no this is not the case. it is far more likely both CPU's have been damaged. the amount of force required to withdraw the first CPU is also likely to have cracked the board and same again if the second CPU was withdrawn the same way.
obviously too late now but I wouldn't be pulling the CPU to find a rattle. it's more likely a fan bearing or one of the drives has a loose component.
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by:Zoplax
ID: 7119484
Neither would I!  They did find the cause of the rattle, as I mentioned, but in doing so the "patient" was killed, it would seem.  

Anything else they could check?  Yeah, I realize the board is probably toast, but just in case there are any important wires, etc., which might've easily come loose that they may not be aware of.  
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by:rid
ID: 7119587
Did they try insering the processors without opening the ZIF socket? Since the machines are already in a non-operating state, I'd suggest undoing the heatsinks and inserting the processors the correct way. Otherwise there may be contacting problems. Check processor contact pins. There may be a bent or broken one, suggesting a new processor rather than a new MB.

It seems improbable that Compaq would force the processors down the ZIF:s, so there has to be a way of operating the release lever correctly, or attach the heatsink after the processor is in place.

Regards
/RID
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by:Wakeup
ID: 7119623
interesting....listening for an answer.
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by:slink9
ID: 7119787
I agree with rid.  You should be able to get a screw driver or something else in there to slip the ZIF lever up.
Who knows, Compaq may have put the CPU on the board and then soldered things around the sockee.  This is Compaq we are talking about.
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by:jhance
ID: 7119803
Hopefully these are good friends because they certainly AREN'T laptop repairmen!!!

I'm sure this laptop is RUINED.  ZIF sockets are DESIGNED to not let go of the pins of the IC when the lever is closed.  If he were able to pull the CPU out he certainly "ripped the crap" out of the pins inside the ZIF socket.  

The socket is ruined and it cannot be repaired.  The only solutions I can suggest are:

1) Have a QUALIFIED technicial remove the old ZIF socket and install a new one.  Yes, this is a difficult task but someone with the PROPER TOOLS and skill can do it.  Chances are your local computer shop will NOT have anyone qualified.  If you know anyone who reworks circuit boards for a living, especially in a factory setting, they can probably do it.

2) Get a replacement motherboard and swap it out.  But, you again need a qualified technicial to do this.  You friend is NOT the right person.

3) Scrap the laptop and get a new one.  Give the old one to your "tech-wannabe" and let him practice.

I wish the news was better but sometimes the stupid things we do have consequences that cannot be easily undone.
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by:ITsheresomewhere
ID: 7120292
Of course they could take them to a real repair facility that has real tools and stop messing just on the outside chance that there is still hope.  Also a full explanation of exactly the extent of damage could then be gotten.

ITsy
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by:Wakeup
ID: 7120357
Also on jhance's lines,

The CPU's are also probably dead.....so even if you get someone to rework the boards and get new sockets etc, the CPU's are probably bad....I don't know if the CPU's you have can be replaced by new ones that are not from Compaq.
There may be a size difference in the processor, or the way it was built.  
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by:joe_aqs
ID: 7120413
The CPUs are not seating properly if the ZIF sockets are not being opened and closed properly when the CPU is being inserted and removed.

Those ZIF sockets either have a block off piece of plastic stopping the socket from releasing or there is a "screw" type release depending on the processor.

What type of processor are we dealing with? I could do some research but I don't have the time. Are these FPGA or PGA2 processors?  

What is the model number of this laptop?

Joe
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by:WiZaRd
ID: 7122010
"Anything else they could check?"

The balance of their bank accounts perhaps?
I'm a bit loathe to suggest anything that involves touching parts here. Well the damage is probably done so might as well check for bent or snapped off (still in socket) pins. Look but don't touch for anything not seated correctly. I appreciate these guys are your friends but perhaps you might like to warn the local community in case they decide to expand their horizons.


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by:WiZaRd
ID: 7122034
Wakeup
"interesting....listening for an answer"
the answer is 42!
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by:jhance
ID: 7122076
>>The CPU's are also probably dead

Why would you theorize that?  Unless it's physically damaged with bent or broken pins or a cracked package, it's probably OK.
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by:slink9
ID: 7122758
Can you visibly tell if it has been statically zapped?
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by:Wakeup
ID: 7122792
jhance,

well like i said probably.  Never said it wasss....also due to the nature of the pull, and that the second laptop, they didnt explain how the CPU was pulled out of that one.  If they found out how to remove the CPU from the first, I would gather that they tried to remove the CPU from the second one the right way.  And since having tried both CPU's in the laptop with the bad socket....then having tried both in the laptop that the socket May still be good and the laptop didn't post, maybe just maybe the cpu's are now bad.

Just a thought.  Not all the evidence is in yet.  Jhance you are right, they may still be good.  And also realize that just because they are not physically damaged, internally things can happen.  Just cuz my car looks fine on the outside no dents or scrapes etc, doesn't mean my car is going to run fine.  

And as you stated "it's probably OK."  so that is my theory, and your theory is "it's probably OK."  you dont sound sure yourself....why not say they ARE OK...?  If you are sure?

I am just letting them know the possibility.  And not to put hope in the CPU's either untill they can get a positive answer just as you have.

And as slink9 states: Can you visibly tell if it has been statically zapped?

Seeing how professional these pals are, of course they probably made sure they grounded themselves out and made sure they wore antistatic straps etc.  And of course made sure they put the CPU's in the right way. and all that goodie crap.  Anyway........that is why both laptops aren't working?
hmmm...
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by:Zoplax
ID: 7123251
Hi all, thanks for the, in some cases, whimsical comments.  :-}

Yeah, I know and agree that the laptops (definitely the first one and possibly both) are mostly likely f*cked.

More details on the story; when they removed the first laptop's CPU, they went ahead and pried off the heat sink by force with a screwdriver; the guy doing it was an electronics engineer, so hopefully he used static precautions, etc., but he's a rather laid back kind of guy so who knows.

Owner of the second laptop (and initiator of this SNAFU) has ordered a couple of comparable CPUs via eBay, will post if and when he has success with these (he's pretty confident they're suitable replacements [at least by part numbers and specs], but we'll see).

I must say, when he first related this story to me about popping open the laptops to poke around, my eyes bugged out and I basically went, "HUH...?!"  I've done lots of desktop PC support but never more than removing from a laptop what is typically removed (floppy, CD-ROM, hard drive, battery, PCMCIA), so this was a shock.  When he told me, "So we finally managed to PRY off the heatsink..." in my mind I was saying, "Holy sh*t..."

Anyway, more updates to come in the next week or so, thanks again for the interesting reading.  :)

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by:Wakeup
ID: 7123269
Zoplax,

My other advise....Is to becareful using those new CPU's from Ebay....or whatever....
IF the motherboards are indeed bad....or something is shorting out the motherboard, it can indeed destroy the good working CPU's...So my suggestion is to be very cautious when tampering with those CPU's in the laptops.  Do you know how they removed the CPU from the second one that was not making any knows and should have been working fine?
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by:Wakeup
ID: 7123270
knows=noise
dunno why i typed that there....funny
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by:joe_aqs
ID: 7123388
I have to add, not many of our questions were answered or addressed (esspecially ones from laptop repair techicians and other wise EE members).

Good luck on this endeavor.

Unsubscribing. (been through this one too many times)

Joe
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by:Zoplax
ID: 7338813
Hi all, I'm posting a delete request for this question, if you have a problem with this please post; basically the responses I got were informative but in retrospect this question wasn't one which begged for an answer, more of a lament about what this person could possibly do right after doing so many things wrong.  :)

Thanks for your input and suggestions.

It turned out that the guy was able to get his laptop, at least, completely replaced with an extended "cover-all" warranty which was still valid.  The other laptop though, is dead; last I heard he was selling parts on eBay.  
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by:slink9
ID: 7338982
I don't think it should be deleted.  You asked a question and the problem was discussed.  If you didn't want to award points for it you should have posted a 20 point (minimum value) question.
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by:Zoplax
ID: 7338987
Hmm point taken.  Depending on the feedback I'll consider splitting up the points.
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by:Computer101
ID: 7339093
I will handle if a split is required

Computer101
E-E Admin
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by:Wakeup
ID: 7339807
I'm in! :)
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by:slink9
ID: 7340678
Count me out of a split.  All that I did was agree.
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by:joe_aqs
ID: 7340886
Count me out of the split also, .. all I did was ask questions that were never answered..

:)

Joe
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Mindphaser earned 0 total points
ID: 7438256
Points refunded and moved to PAQ

** Mindphaser - Community Support Moderator **
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by:slink9
ID: 7438371
Interesting.  Wakeup got gypped.
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by:Wakeup
ID: 7439052
Yup....I thought we were going to split?!  What happened?
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by:Mindphaser
ID: 7439473
Sorry folks ...

I came from CS (http://www.experts-exchange.com/Community_Support/Q_20375045.html) to clean up in these lingering questions. Zoplax posted and despite our requests never gave us feedback about what he wanted to do with this question.
I took the refunded 100 points from Zoplax now and YOU let me know who should get points. Adn I'm sorry, I'm NOT splitting in smaller junks than 20 points :-)

** Mindphaser - Community Support Moderator **
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by:Wakeup
ID: 7441927
i am not sure who wants in on the split..but I thought i gave him extensive valuable information.  Just because he or his friends were lamenting over the lost laptops, and offered points for some information in which they did look into and did try, doesnt that count for something?  Anyway, speak now and get in on the split or forever hold your piece...

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by:WiZaRd
ID: 7442508
My vote.

Zoplax is asking this question on behalf of his idiot mates (sorry but there's no other way to describe this kind of behaviour I.E. having destroyed one laptop let's see if we can do it again!)
I can't really see anything constructive here and in fact all we seem to have done is state the bleeding obvious!
There are probably several correct comments here but they are all along the lines of "If you stick your finger in a power socket you'll get hurt!"
"Count me out of a split.  All that I did was agree"
I think the above comment from slink9 sums it up.
In short Zoplax is saying "My associates did something really dumb. Do you agree?"
Saying yes to this question does not deserve any kind of reward in the form of points. For mine it is purely a PAQ for the archives which should be filed under "S" for stupid or "M" for moronic or even "R" for Ripleys believe it or not!!
Zoplax should not be penalised here for asking a question out of sheer desperation in the hope that his friends' stupidity might become less expensive.
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by:Mindphaser
ID: 7464187
Ok, the verdict is out :-)

Since nobody with the exception of wakeup wants to be in a split I will post a question for wakeup (not the full amount, that would be unfair ...) in this TA.

** Mindphaser - Community Support Moderator **
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by:WiZaRd
ID: 7473567
Good call Mindphaser
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