Re: [NTLK] Jaggies/contact cleaning take two

From: Chris Chapman (pan1k_at_earthlink.net)
Date: Fri Mar 29 2002 - 16:17:03 EST


I'm no genius but i'm pretty sure the oxidation has to go right? That would
be my best bet, or like I did, break down and buy one :(. But I give you
props for going further than I did to try to fix it...

-Chris
----- Original Message -----
From: "Jeremy Bond Shepherd" <jbond_at_eskimo.com>
To: <newtontalk_at_newtontalk.net>
Sent: Friday, March 29, 2002 1:12 PM
Subject: Re: [NTLK] Jaggies/contact cleaning take two

>
>
> Well I tried cleaning a second time last night, and no better. Jaggies
> still present, probably worse than before I made the first cleaning
attempt.
>
> >1. Did you clean the 4 contacts of the translucent flexible ribbon cable
> >from the display?
>
> Yes, I cleaned the 4 contacts on the ribbon cable with my "Contact
Cleaning
> Pen" from Rat Shack.
>
> >2. Have you also cleaned the gold contacts on the mobo? Today I found
that
> >some grease was used, probably by Apple to protect the surfaces.
>
> Yes I did clean the gold contacts on the motherboard. Could this be a
> problem? Was the grease there to help make the contact? If so, should I
> replace it? What with?
>
> >3. I would suggest to use a very fine glass fiber brush to clean the
contact
> >pads, especially those of the ribbon cable.
>
> OK. Where can I find a very fine glass fiber brush? Would Rat Shack have
> something suitable? I did notice that te contacts on the ribbon cable
> aren't "shiny" like most contacts are. They had a slightly dull
appearance.
> I don't know if this is normal or if it indicates a problem (oxidization?)
>
> >4. If you did all that I might be that there's really something big stuck
> >between display and case. Did you remove the display and clean both
sides,
> >the display and the case too? This might be worth doing.
>
> Did that.
>
> >5. Cleaning with alcohol is definitely good but it will remove only
grease
> >and not the oxide.
>
> I used my isopropynol pen this time around. I presume oxide removal will
be
> by the glass fiber brush cleaning?
>
> >6. Check for the small soft foam which is supposed to press the ribbon to
> >the mobo. Maybe this beast got weak, needs replacement or is dirty?
>
> Aha, I did look at that this time. It's very low-profile. I don't know if
> it's really pressing against the leads or not. Maybe I should take
Victor's
> cue and cut a small piece of paperboard or foam to raise the level of that
> pad. Anyhow, I did clean it with the isopropynol pen. It didn't really
look
> dirty though.
>
> Any other ideas/tips/suggestions welcomed.
>
> Thanks,
>
> -Jeremy
>
>
>
>
>
>
>
>
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