Repairing instead of throwing things away

    I’ve decided to throw away far fewer perfectly functional things over minor issues this year. It started with an old monitor: the power supply would only click, and in the end it turned out to be two swollen capacitors that cost a few dollars. It’s working again, and honestly, that feels better than just ordering a new one.

    It’s similar with household appliances. Coffee makers, vacuum cleaners, fans, maybe even a circulation pump—often it’s just switches, broken wires, bearings, or seals. Of course, not everything is worth repairing, and when dealing with 230 V or pressurized equipment, you should know what you’re doing. But many manufacturers also make things unnecessarily difficult with glued-together housings and proprietary screws...

    My rule of thumb: First narrow down the fault, then compare the cost of the replacement part with buying new. If the item will probably last a few more years afterward, I repair it. iFixit, exploded-view diagrams, and a multimeter have already saved me quite a bit. My little soldering iron paid for itself a long time ago anyway.

    What have you successfully brought back to life recently—or what did you fail to fix? I’d also be interested to hear which replacement-part sources and tricks have actually worked for you.

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    As long as it's just a few electrolytic capacitors, plugs, or wires—no problem—I can quickly tinker that together too.

    Usually, though, the problem runs deeper and you need replacement parts directly from the manufacturer. Then things usually get difficult, but defective goods are offered cheaply through all kinds of channels. Those could then serve as spare-part donors. But is the effort worth it? If you can do it yourself, it may well be worthwhile. But if you need a professional, it often no longer pays off and would only be something you do for your conscience.

    Thanks to new EU regulations, things should at least become easier for newer devices. But I still don't really believe that, since manufacturers want to sell new products. They'll find ways to make things difficult for us again.

    My last repair was my computer mouse. The classic: broken cable
    I didn't need any spare parts for that, though—the cable had broken just behind the housing. I shortened it a bit, cobbled it back together, and that was it. I can live with the cable being 5 cm shorter. The biggest hurdle was actually the fancy fabric sheathing, which wanted to be tamed again.

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    Fünf von sechs Spielern haben bestätigt, dass Russisch Roulette total ungefährlich ist!

    I’ve actually had good experiences with donor devices for spare parts—especially with older appliances for which the manufacturer stopped supplying parts long ago. You do have to factor in storage space and time, though; for a washing machine, a used module can quickly make more sense than buying a completely new one, whereas for a $30 electric kettle, probably not.

    I’m cautiously optimistic about the EU requirements. Paperwork alone doesn’t achieve much, but if batteries, spare parts, and repair manuals really remain available for longer, that’s already progress. And even if you don’t repair everything yourself: opening up the device, narrowing down the fault reasonably well, and giving the repair service specific information can make the bill considerably smaller. These days, though, I’d rather leave mains voltage and pressure vessels to someone else—that doesn’t have to be the occasion for a personal learning experiment.

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    Narrowing it down already helps enormously. Then you can at least tell the repair shop or customer service specifically what is probably broken, instead of having them replace everything just in case. But with 230 V and capacitors, that’s where the DIY fun ends for me too—better to ask a professional once too often than to end up in the hospital because of a repair.

    What helps me with donor devices for spare parts: Before buying, always compare the rating plate, revision, and connector variants. Unfortunately, “same model” doesn’t always mean the same circuit board when it comes to electronics. And I photograph every step while taking things apart; otherwise, there’s guaranteed to be a screw left over at the end. Which devices do you find particularly rewarding to repair—household appliances or consumer electronics?

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    …left over, which the manufacturer said was “not necessary,” but the device still makes a strange rattling noise afterward.

    When it comes to donor devices for spare parts, I also consider the model-plate/revision details crucial. I once had two seemingly identical printers where the mechanics fit, but the circuit boards had different firmware versions. In the end, I could only use the power supply and a few gears. It was still worth it, because buying the original part separately would have cost more than the entire used printer.

    What often bothers me more about repairs than the parts cost itself is the diagnostic time. Spending an hour troubleshooting a device that costs 40 euros new feels irrational at first—but throwing it away and buying a new one also doesn’t take “zero” time once you include packaging, ordering, and disposal. For more expensive devices, a good description of the problem is worth its weight in gold. Unfortunately, some repair shops really do prefer replacing entire assemblies, because otherwise labor costs and liability are hardly predictable.

    I’m cautiously optimistic about the EU rules too, much like Murks. Spare parts aren’t very useful if they’re only available at the official price of half a new machine, or if the instructions remain deliberately cryptic. It would also be interesting to hear whether anyone has experience with independent spare-parts dealers—especially for seals, pumps, and switches, there are quite a few aftermarket options, but the quality seems to vary widely.

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    When it costs … euros, it’s of course difficult to justify economically. But for me, the learning factor also matters—when a similar error occurs next time, the diagnosis is often significantly faster.

    What I’m still missing is a reasonably useful decision rule for electronics with an unclear cause. With a monitor or printer, you can take things step by step, but with glued-together battery-powered devices, it quickly turns into a battle of materials. And used donor devices may be sustainable, but they can also be on their last legs. Do you somehow test such parts before dismantling them, or do you tend to buy them on the assumption that “there’ll be at least one usable part in there”?

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    When buying donor devices for spare parts, I try not to buy blindly with a “it’ll probably work” attitude. If the seller provides a video of the device running, that’s already worth a lot. Otherwise, I specifically ask about the symptoms, operating hours, and whether any liquid damage or repair attempts are known. With printers, for example, a photo of the device powering on isn’t enough: A device can boot and still be unusable because of clogged nozzles, a defective encoder, or worn-out mechanics.

    My general rule for unclear electronics: First check everything that can be tested without taking anything apart—power supply voltage, fuses, visible damage, connectors, current draw, and unusual noises. Then I decide whether the most likely faults can be tested with a reasonable amount of effort. If that requires an oscilloscope, proprietary software, or three more replacement boards, that’s usually where I draw the line with an inexpensive device. Learning value aside, at some point repair simply turns into electronics bingo.

    I’m much more cautious with battery-powered devices. A glued-in battery isn’t just annoying; removing it also poses a real fire risk. A donor device is really only worthwhile if the required part has been clearly identified mechanically or electronically and the battery itself isn’t the problem. And when mains voltage is involved, the rule still applies: De-energized doesn’t automatically mean safe—capacitors can still hold a substantial charge.

    What has worked well for me: Before stripping anything down, I first compare the spare-part number and photos of the circuit board, then disassemble only as much of the donor as necessary for the functional test. Have you ever removed parts from your donor devices as spares, only for them to sit around for years afterward? In my case, it has almost turned into a small spare-parts warehouse of its own.

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    Quote from KlartextKai

    Have you ever taken parts out of your donor devices to keep as spares, only for them to sit around for years? In my case, it has almost turned into a small spare-parts warehouse of its own.

    I did that for many years. I accumulated boxes and boxes of stuff. I hardly ever needed any of it. But I kept moving the boxes around. When I moved house for the last time, I got rid of them. No—I don't think it's worth building up a stockpile. That would be more suitable for repair cafés. I simply don't have the space for it.

    If I need parts, I get them as needed instead of hoarding them. I can't get started right away that way, but I also save myself the hassle of managing storage in a small apartment.

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    Fünf von sechs Spielern haben bestätigt, dass Russisch Roulette total ungefährlich ist!

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