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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Just a quick update. Sprayed the 4x 30pin SIP holes with switch cleaner, it evaporated off. Reinserted the SIPs and all is running great again.
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Another question, does anyone know, (not hearsay or theoretical) do these laptops only run with 4 SIPs?
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    For over a month I have had fun with my NanTan working perfectly. The last week it's giving Parity errors on POST and when it doesn't it freezes up within a few mins. There was some corrosion on the SIP pins. I've cleaned then up but only a slight improvement. There's corrosion inside the...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    I have my battery working well just be replacing the C Cells.
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Does anyone know what BF and BL are? My guess is Battery Low and Battery Full, am I correct? The LED that's on I've worked out Green is Battery and AC is red.
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Yes must be!! Thanks mate. I gently pushed each SIP and switches on now. I'd like to run with 2 of the 4 and keep a eye but I don't think that's possible? Thanks
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Do you happen to know with this if you always have to have all 4 SIPS in? Id like to test them bit I remember once before I couldn't seen to get it to boot with just 2.
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    My NanTan was working great and I was switching on every day. Been about 5 days since I last used it, booted into DOS fine. I left it 5 mins and came back to this. Switched it off and on and now nothing on the screen. I've had this happen before but had been fine. I'm not sure if using everyday...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    I am already to rebuild my external battery. 4 screws to undo. Saved the cable from the original Ni-Cd to then solder onto a new pack. I did have the option of buying a 10 C Cell wrapped just like the original, but I have gone for 2x 5 C Cells because then I can replace half the pack if needed...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    The main battery in that link looks good. I do like the way you have replaced the battery. However, isn't there an increased risk of leakage because when the laptop is on, the motherboard is expecting to be charging a Ni-Cd?
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    The last job to do in restoration for me is the main battery. Its 2x5 Full Size NiCd C Cells. Full size C Cells are almost impossible to find singular. However you could use Sub C's or 4/5 Sub C's. I've found somewhere in the UK that supplies a 5 cell stick for £17. I'm looking to buy 2, however...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    I "think" the cap is OK. I've washed all the gunk off with White Vinegar , and will observe to see if the flashing ever comes back. When you say a cheap measurement tool from Ali Express? Do you mean a dedicated Capacitor Tester? I've a multimeter already. I'm so pleased I've removed the...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    I bet its this one. It was about 1mm above the leaking battery.
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Too late, already fitted, today infact, picking it up 9.30am tomorrow. What's the shottky diode for? To mitigate against the charging current? If so do you put the diode on the positive or negative side? Positive, I'm guessing? A lithium cell (Inc holder) would also be a good idea as the space...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Solved now, a piece of loose solder was left and had jumped onto the motherboard!!!
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    You need to remove that asap before the junk starts eating your motherboard! I picked up a 3.6v Ni-Cd off eBay for about £3. And paid a local TV repair £10 to swop. I went for a Ni-Cd, because being a Ni-Cd the motherboard must be able to recharge it. If you put a Ni-MH in, there's a good...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    All three are connected to the screen. When I took my laptop apart earlier today I didn't disconnect any of these three. I only disconnected like an earth on the video card and the video ribbon and I could then totally seperate the screen (still connected) and the power supply board from...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    Hi, I've come home tonight, I way playing with my laptop and it froze and now won't boot, it just hangs here. I think I am going to give up because I seem to fix one thing and something else breaks. I'm tempted to strip and sell, do you want to buy my keyboard?
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    Panasonic CF-41

    Hi I have an old Panasonic CF-41. The battery had started the leak so had been removed. Probably unrelated, but might be, when I switch it on now (5+ years on) all that happens is the battery light flashes red. No sounds of fan, no beeps nothing. Is it essential to have the main battery...
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    NanTan Early 1990's laptops Guide (386/486/Pentium)

    At the weekend I noticed that when I switched on my 3500 (monochrome) the screen flickered like mad. I managed to adjust the brightness and contrast so the flicker was bearable and then after about 5 mins it was gone so didn't think anything about it. Monday, Tuesday all was fine. Yesterday the...
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