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milk on PCB
milk on PCB
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Old 12th December 2017, 10:08 PM   #11
Tiido is offline Tiido  Estonia
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Cheap toothbrushes work wonders on electronics, they scrub off all the gunk very easily.

Milk isn't super terrible in a laptop, all the ones I have had to deal with at work came back to life after a thorough wash and scrub in the affected area. Keyboard may not survive though but they aren't very expensive and meanwhile waiting for replacement you can use an USB keyboard or enable "on-screen keyboard" in accessibility settings.
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Old 12th December 2017, 10:19 PM   #12
JeffYoung is offline JeffYoung  Ireland
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I love the espresso steam wand idea!

Milk solids can be surprisingly durable. Casein paint was one of the standard interior paints for centuries.
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Old 13th February 2018, 09:06 PM   #13
ej25awd is online now ej25awd  Canada
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I've used industrial steamers in the past to clean PCBs but stopped using them after I learned firsthand how potentially damaging it can be to ESD sensitive parts.

One day while cleaning a CRT monitor driver PCB, board on one hand and the steam wand on the other hand, I noticed that the neon lamp on the board was glowing bright orange. It appears that the jet of steam coming from the wand was generating enough electric charge to light up neon bulb. Neon bulbs ionizes at around 90V. One can imagine the how much electric charge is really being built up on the board during this process.
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Old 13th February 2018, 09:42 PM   #14
billshurv is online now billshurv  United Kingdom
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milk on PCB
Update: It didn't come back to life and I really couldn't be arsed with tracing through acres of dust sized SMD components to find what it was unhappy with so ordered a new motherboard. I feel bad admitting defeat, but sometimes life is too short!
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Old 14th February 2018, 04:41 AM   #15
Cal Weldon is offline Cal Weldon  Canada
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milk on PCB
Quote:
Originally Posted by Max Headroom View Post
Milk solids are water soluble and not solvent soluble.
There's fat in most milks.
The rest of your advice is sound.
Quote:
Originally Posted by billshurv View Post
Update: It didn't come back to life
Bad news.
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Old 15th February 2018, 11:15 PM   #16
billshurv is online now billshurv  United Kingdom
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milk on PCB
Removed the motherboard to fit the new one this evening. Turns out there was milk gunk on the underside as well. I thought about another clean but decided against it as would incure additional cycles on the ribbon connectors which I have a pathalogical hatred of after years of fixing nintendo DS for the kids. So part of me still feels bad for wussing out, but laptop works and I can get back to interesting audio projects
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Old 16th February 2018, 01:01 AM   #17
dtaylo3 is offline dtaylo3  United States
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I was hoping to hear that the milk had allowed a tube-like "liquid" sound to emanate from the board's DAC.
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