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68LC040 in Centris 660av

jonpurdy

Well-known member
It’s really messy!

i wouldn’t use it at all, it needs to be washed through fully - have you washed a logicboard before?

Cheers 

AP
I have not. I recall putting keyboards into the dishwasher when I was a lazy teenager but never thoroughly cleaned a logic board.

 

Johnnya101

Well-known member
AAAAAAAAAAAAAAAAAAAAAAAAAAAA

That looks like a bad one. Needs a whole heavy cleanup and recap. If you are not comfortable doing this stuff, send it out and have it done professionally. Pretty cheap.

 

AlpineRaven

Well-known member
Ugh - dont put stuff in the dishwasher please.... lots of reasons why its not good...

if you have access to ultrasonic washer - good go for it... I think at the end of the day you're better off getting someone to rebuild it for you.
Cheers

AP

 

Macdrone

Well-known member
i put mine in the dishwasher without soap, but with rinse aid.  never had an issue.  But that is just me.  Im a cheap fixer.  I also bake imac video cards in the actual oven.  So far i have a pretty good repair record.

 

AlpineRaven

Well-known member
i put mine in the dishwasher without soap, but with rinse aid.  never had an issue.  But that is just me.  Im a cheap fixer.  I also bake imac video cards in the actual oven.  So far i have a pretty good repair record.
Its because the cap leaks is toxic - do you want be eating your toxic cap leaks on your dinner plate and drinks?!?

Cheers

AP

 

jonpurdy

Well-known member
Hah, I wouldn't actually put a logic board in a dishwasher. We could take it to someone, but this is a skill that we should learn. I'll look into cleaning up the board myself.

Recapping shouldn't be difficult either; I've had soldering experience in the past and I've got a new soldering iron kit with nice needle tips and a desoldering pen-thing I've been wanting to put to use (after it's initial lamp cord fixing use). Fortunately, we've got a dead Centris 610 that will serve as a perfect practice rig (and recapping might actually fix that, too).

 

Macdrone

Well-known member
it all washes down the drain.  extra rinse.  its what the rinse aid helps, both on the board and for the dishwasher.  And literally everything we breathe is more toxic than some residue cleaning off a board.  I am not worried.

 

Paralel

Well-known member
First you must remove all chips that are socketed and in inspect all the legs and body for corrosion. If corrosion is present remove that corrosion. You need to completely douse the logic board using 91%-92% IPA (in your case, maybe a short submerge for a few hours may be a better bet since that is some seriously evil corrosion...) and then scour your logic board with a soft tooth brush (the softer the better) using a Sonicare or Oral-B on its lowest setting, and scrub until the sensor comes on that you are brushing too hard. back off, scrub all of the visible gunk, and every and kook and cranny, Then dry blow every inch of that logic boarb, using the COOL settimg.(This Is CRITICAL) on a blower dryer, especially the large chips. Once you are satisfied the board is dry, let it it sit for 72 hours for all the residual moisture to evaporate . And hopefully you are good to go.

I have used this method many times, without fail, so I feel confident it will restore a logic board to working order, at least temporarily, until more permanent pairs can be completed. This is assuming that the underlying problem is mild-to moderate cap rot. If anything else is going on this method most likely will not work. All though it will not makes things worse, one must always remove cap goo as the first step to repair

 
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