Re: [M100] stupid move = expected results

[Patrick Bureau]

Note: the following is how I deal with it, do as you like --- STEP ONE --------------------- First and this will be repeated by everyone and you know this already go ahead and clip that battery off.  You can do unsoldering later when you get a fresh one --- STEP TWO --------------------- Get distilled white vinegar,  and distilled water at the store (cost like 1$ for a gallon), do not use tap water! I do a battery cleaning with vinegar, water then then sodium bicarbonate for caps, water again and then dry.   --- STEP THREE --------------------- I use electronic alcohol (99% isipropolene Alcohol) and a toothbrush to scrub everywhere I see corrosion Hopefully once you scrub the board you will be able to see if traces have been broken/eaten away or not.   Corrosion will seep into soldered components and work thru it and to opposite side of the motherboard so check both sides I usually unsolder all corrosion seen near components and replace the “corroded solder” with fresh one. This also permit to find underling hiding board issues.   Black accumulation is a dead give away of corrosion and will need to be scrubbed off with a special “pen”  (thanks for that tip Birt!) I use and love how cheap and easy to use Fiberglass Scratch Brush Pen . it will reveal any “damage” need to be repaired.   --- NOTES REGARDING YOUR PICTURES--------------------- The X1 crystal has nothing wrong that glue is important for it to remain it isn’t corrosion. Yes all caps should be change on the M100, if one has leaked as shown in your picture  the rest will as well.   Image of the power supply area of the M100 with “plaque corrosion” https://i.imgur.com/XhWLvh9.png   before corrosion removed with vinegar bath https://i.imgur.com/4nVtvfq.png   microscope image of corrosion on  other component https://i.imgur.com/3Uk3NT5.png   After corrosion removed with vinegar bath and replace battery and caps and un/soldering corroded solder https://i.imgur.com/qllXbWN.png     Patrick B. (TTR)   From: Daniel L Sent: Thursday, February 9, 2023 4:14 AM To: m...@bitchin100.com Subject: [M100] stupid move = expected results   Okay, a few years have passed. I get it. Things happen. Bought my first 100 in 2020 from eBay - instantly had problems that still exist today but I've recently identified a solution. Soon after, my second 100 came to me as an inexpensive 'for parts' unit that ultimately worked fine - the seller didn't have the memory switch set to 'on' and thought it was dead. The thing works like it's fresh out of the factory. Guys, I learned that I made a big mistake. Got my 200 from this list soon after getting my 100's and made that my daily driver from then on. 100s found a home in the closet next to the board games. I decided today to register them all with Web8201 and cracked her open for the first time. I wasn't thinking too much about the insides, stupid me, and opened it to get the necessary numbers to provide good registration info. As I was screwing her back together, I decided to inspect it for problems. Looked at the battery and, on initial inspection, it looked okay. Then I looked closer and found residue on the side, then residue on a number of via's where the nearby resistors are soldered in. I should have inspected it two years ago but it just sat on my closet and I can't help but think maybe it only leaked after i got the device. Again, I turn it on and it's splendid. I just wish I wasn't so stupid as to ignore the inspection two years ago. Or, at least, I wish I had at least removed the internal battery when I got it. Just stupidity here. BONK So now I have some soldering and cleanup to do. I assume the resistors should be replaced? I went ahead and excised the motherboard from the shell for deep inspection. As you can see, there are some leaking caps, residue, and some impacted traces so... I have some restoration work to do. And I have some components to order. I also have to learn how to restore traces. Pictures: https://imgur.com/zn3fV4G.png https://imgur.com/m6yzNzm.png https://imgur.com/nWw3JNh.png https://imgur.com/yMlMc5L.png https://imgur.com/mbyV6xB.png https://imgur.com/m1Uc6ez.png From yall's experience, is this real bad or not too bad? Daniel