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FANTASTIC work, @Stephen ! Now I just need a LISA! 😅

According to @SuperSVGA in his post here, he says pads marked 3 & 2 for the missing MOSFET Q5 on the 5126 backlit Portable are connected together. In other words, that would mean the following should be true... NOTE: I don't yet know if the SOUND_CS circuit above is just left floating due to...

Thank you for your kindness in doing that audio testing. That confirms my suspicions. For truly, the base noise floor with the volume turn to 0 is unusually high, and such as not there on any of my other message Macs. Nevertheless, the audio works and is quite loud at the maximum volume setting...

The more I look at R62 & R63, The more inclined I am to believe that somebody must have swapped them out in the past. For example, look at the solder on either side of those two resistors in the photo in my earlier post. It comes up in the shape of a little mountain, just as if it would if your...

Honestly, I strongly recommend you purchase the following product, which eliminates the need for a battery entirely: https://androda.work/product/macintosh-portable-battery-eliminator/ I also strongly recommend that everyone recap the Portable’sAC adapter too, because all of them have leaked...

By the way, the following is a close-up photo of the two 10-ohm resistors The resistors look fine, but take note of how the 2 traces that connect those resistors in parallel have been blackened. I’ve highlighted those connections in yellow below: I was able to use an X-Acto knife to very...

Thank you for making time to reply and for confirming that the source & drain on that P-channel MOSFET are connected together on the 5126 Portable. In answer to your question, my first steps will be to test the sound with my 5126 Portable in the headless condition as shown in the photo in my...

When you test, please note: 1. I cannot hear the soft "pop" at all if the Volume is set to 0 via Control Panel. 2. I can still hear background noise through headphones even if Volume is set to 0. 3. You need to listen for 30 seconds to see if the noise changes. In my case, it does. There's a...

I wish to humbly thank you and praise you for being the first person who has so kind take time to do a listening test on your 5120 Portable. You have confirmed there is no soft "pop" sound every 10 seconds. I suspect that is true on the 5126 Portable as well, but I would appreciate feedback...

It never ceases to amaze me what determined, brilliant people can put together in this hobby. Bravo, @max1zzz ! 👏

I will admit I am disappointed that although this thread has been read 78 times, I am the only person thus far who has replied. But maybe this reply of mine will bump this thread into view and generate a little feedback from some of you. 🤞 I'm getting replies on FaceBook (Vintage Apple...

Although this schematic set only covers the non-backlit 5120, much is similar to the 5126. For example, the audio section matches my 5126 Portable quite well. The Hybrid section is of course different. To download, click the blue button in the upper right corner.

Now as to SunBright or whatever the H202-free method is called, I tried it after seeing Perifractic try it on his Retro Recipes YouTube channel. It did not yield great results for me, and on my HD20 enclosure, I was hard pressed to see any improvement at all, even after 4 days in direct sun...

Please don't take this as a chastisement of any sort, but I feel strongly that we need to mention the CONCENTRATION of H202 whenever we talk about it. If people are referring to that 40% stuff, then yeah. But if we're talking about the 3% drug store that even I can buy here in highly...

Sorry for replying to an old post, but I've not posted in this thread in a long while and I only finished reading all the pages of this thread today. I wanted to point out that "rkauer" stated that he is using "a flask of 40% H2O2." Forty percent is an extreme concentration that I cannot buy...

Would love to hear your opinion on bakinghe LCDs. (I just finished reading all 15 pages of that monolithic thread, by the way.) I have baked the graphics card inside the late 2009 iMac because those have no electrolytic capacitors on them. But a graphics card isn't as fragile as an LCD...

Thanks, Kai. Hmmm... Setting the oven to 85°C isn't too bad, but 9 hours! His before/after looks promising, and I see a comment made under his video several months ago asking how the LCD is today, and he replied it is the same. Of course, his PB170 LCD type isn't 100% the same on the...

By the way, I didn't notice it at first because I only received my 5126 Backlit Portable a couple days ago, but the lower left corner very slightly darkens after a few minutes of the machine being on. It seems that is called tunnel vision. Supposedly it is moisture that has gotten inside the...

I spoke with @Sideburn privately. USPS are real stinkers, wanting $19 to ship something super tiny and feather light to Japan. So I did a lot of searching and found clear 0.8mm x 4.0mm silicone tubes in 1 meter lengths for $1.17 + $2.56 in shipping to Japan. (They offer free shipping, but that...

I was hoping to just buy using your EBAY link, but despite the seller being in China, they refuse to ship to their next door neighbor! What the...!? I will send you a PM shortly.