c/electronics-repairers

Serious question, is anyone else seeing more of these tiny surface mount fuses lately?

I had a flat screen TV on the bench last week, a common brand, with a dead power supply. I was sure it was the main switching IC, my usual suspect. I pulled the board and started checking. After about twenty minutes of poking around, I found it. A tiny, clear SMD fuse, no bigger than a grain of rice, had blown. I almost missed it because I was looking for the bigger, through-hole parts. I swapped it with a new one from a donor board I keep, and the set fired right up. It made me realize I've been skipping the basic fuse check on these newer boards, going straight for the complex stuff. That little part cost me an extra half hour of work. Has anyone found a good, fast way to test these on the board without pulling them?

Question about a customer who insisted on using a cheap power supply

I had a guy named Dave bring his gaming PC into my shop in Cincinnati last month. He'd replaced his old power supply with a $25 unit from some random website, and then his whole system kept shutting down. I mean, I told him that thing was basically a fire hazard, but he argued it was 'just as good' as a brand name. Has anyone else had to deal with a customer who refused to listen about basic component safety?

A quick heads up about those cheap hot air station tips on Amazon

For years, I just used the standard brass nozzle that came with my old station, figuring it was fine. About six months ago, I was working on a tiny Nintendo Switch charging port and melted the plastic housing right next to it. The heat spread was awful. I switched to a set of those smaller, focused stainless steel tips I saw a tech use on YouTube. The difference is night and day for SMD work. Has anyone found a specific brand of these that holds up better than others?

Found a weird fix for a flickering screen on a 2019 MacBook Pro

The backlight was pulsing on a unit that had a clean flex cable and no liquid damage. On a hunch, I swapped the thermal paste on the CPU with some Arctic MX-4 I had left over from a PC build. The flickering stopped completely after it cooled down and I put it back together. Has anyone else seen a thermal issue cause a backlight to act up like that?

Spent 4 hours on a 'simple' power supply board just to find a cold joint under a cap

I had this old audio amp from a local band that kept cutting out, and the main board looked perfect under my loupe. I mean, I checked every trace and component, even swapped the main IC. Turns out the factory solder on one tiny filter cap was basically just touching the pad, and it only failed when the thing got warm. Who else gets stuck on these phantom issues that turn out to be the most basic soldering flaw?

Showerthought: a customer's broken radio changed how I see old gear

This guy brought in a 1978 Panasonic boombox, said 'it's not about the sound, it's about my dad's voice on a tape.' I'd been focused on fixing the power switch, but he made me realize we're saving memories, not just circuits. Anyone else have a job that turned into something more personal?

Had a tiny ceramic capacitor fly off my tweezers and vanish into the carpet at my workbench

I was replacing a 100uF cap on an old audio board yesterday, and the new one slipped from my tweezers. I heard a faint 'tink' and it was just gone. I spent a good 15 minutes with a magnet (useless, I know) and a flashlight before I gave up and grabbed another from stock. Has anyone else lost a part to the carpet monster, and what's your best trick for finding them?

I used to hate working on old tube radios until I found a better way to clean the contacts

For years I'd just spray contact cleaner and hope for the best, which often meant the crackle came back in a few weeks. Then a guy at a swap meet in Dayton showed me how to use a fiberglass pen, like the Jonard 500, to gently scrub the tube pins and sockets before applying cleaner. It adds maybe five minutes to the job but the connection stays solid for good. Anyone else have a simple step that turned a frustrating repair into a sure thing?

Spent 3 hours on a 'dead' TV that just had a bad fuse

Honestly, this 55-inch Samsung came in with no power at all. I pulled the back, checked the main board, tested caps, the whole deal. Tbh, after two hours I was ready to call it a board swap. Ngl, I finally spotted a tiny glass fuse on the power supply that looked fine but tested open. Replaced it with a 5 amp fuse from my kit and it fired right up. Anyone else get tunnel vision and miss the simple stuff first?

Had a 2019 MacBook Pro logic board give up the ghost last Tuesday

Customer brought it in, said it just died. No liquid damage, nothing obvious. I spent three hours checking voltages and found a short on a 1.8V rail. Replaced the specific power IC, part number CD3215B12. It powered on for ten minutes, then the same fault came back. I think Apple's design on these is just flawed. Anyone else run into this specific chip failing repeatedly?

Just realized I've been using the wrong flux for surface-mount work for a decade

I was repairing a Nintendo Switch board in my shop and kept getting cold joints on a BGA chip. A guy from the Seattle repair scene asked what flux I was using, and I said the standard rosin paste. He just laughed and handed me a syringe of Amtech NC-559. The difference was instant; it flows perfectly at 250 degrees. How many other basic tools or materials are we all just using because it's what we started with?

Showerthought: I was fixing a 2018 MacBook Pro with a dead backlight and my Weller station slipped, leaving a tiny scratch on the logic board near a capacitor.

I held my breath, checked for shorts with my multimeter, and it was fine, but has anyone else had a close call like that where a simple slip could have turned a $300 repair into a total write-off?

I finally gave up on that cheap hot air station from that online marketplace

Burned through about $90 and two full afternoons trying to get it to work right on a simple phone charging port job. The temperature control was all over the place, it would either do nothing or scorch the board in seconds. Ended up melting the plastic on a perfectly good connector because the nozzle slipped. Had to buy the part again and finish the repair with my old, reliable iron. Has anyone found a decent budget station that actually holds a steady heat, or is it just a waste of money to try?

Checked out a new surplus electronics warehouse in Tacoma last weekend

They had a whole section of 'refurbished' power supplies, but the caps on at least half of them looked bulged from across the aisle. I picked up a 24V unit to look closer and the date code was from 2009. The guy at the counter said they just 'test for output voltage' before they sell them. Has anyone else run into shops selling old gear as refurbished without a proper recap?

My uncle told me to never trust a 'no power' diagnosis without checking the fuse with a multimeter first. He was right.

Question about the repair kiosk at the mall in Springfield

I was at the Oak Grove Mall yesterday and the guy at the phone repair counter was using a hair dryer on a laptop motherboard, which seems like a great way to cook the BGA solder joints.

Had to decide between a full board swap or a tricky trace repair on a vintage amp

I had this old tube amp come in, a 1972 Fender Twin Reverb. The main board had a burnt section from a power surge. The easy path was to just swap the whole board for a modern repro, about $180 and a day's work. The hard path was trying to save the original board, which meant scraping back burnt laminate, running jumper wires under existing components, and hoping the carbon scoring didn't cause more issues. I went with the repair, spent almost six hours on it with a magnifier and a fine-tip iron. It worked, but was it worth it? The customer was happy to keep it 'original,' but my hourly rate on that job was basically nothing. When do you guys draw the line between saving the original part and just doing the swap that gets it out the door?

Had a weird short on a vintage radio board yesterday

I was fixing a 1970s Panasonic AM/FM unit in my garage and the whole thing went dead after I replaced a capacitor. Found a tiny solder bridge I missed that was connecting two traces, cleaned it up with my Hakko iron and it fired right up. What's your go-to method for spotting those super subtle shorts before you power something on?

I thought those cheap thermal pads from Shenzhen were junk, but they saved a laptop

Had a gaming laptop with a fried GPU, a Dell G5 5590, and the only pads I had were some no-name 1.5mm ones I got in a bulk pack. Figured they'd melt, but after a year the temps are still holding under 80C under load. Has anyone else had a good run with off-brand thermal material lately?

A trick with a coffee filter saved a vintage radio repair

Last month, a client brought in a 1970s tube radio from his garage in Omaha, covered in thick dust and grime inside. I was cleaning the delicate tuning capacitor plates, and the usual compressed air and brushes weren't getting the fine grit out without risk. I remembered reading about using a dry, unused coffee filter as a soft, lint-free wipe. I carefully folded one and gently ran it between the plates. It worked perfectly, grabbing all the debris without leaving fibers or scratching the metal. Has anyone else found a surprising household item that works for a tricky cleaning job?

I was sure the 'freezer trick' for fixing a dead hard drive was total nonsense

Had a client bring in an old Western Digital 1TB drive that wouldn't spin up, and as a last resort I sealed it in a bag and left it in my freezer for about four hours. Plugged it back in and it actually worked long enough to pull their family photos off. I'm still not sure why it worked that one time, but it saved the day. Has anyone else had a freezer fix actually work, or did I just get lucky?

Bought a cheap hot air station and it died after two jobs

Honestly, I grabbed a $70 no-name hot air station online thinking it would be fine for small stuff. Used it to reflow a GPU and fix a phone charging port, then on the third try the heater coil just burned out. Tbh I wasted a whole afternoon and now I'm out the cash for the station plus the new part I need. Has anyone found a decent budget station that actually lasts more than a week?

Warning: I bought a cheap hot air station that cost me a whole repair job

I got a no name hot air station online for 60 bucks to save money. It worked for a week, then the temperature control went crazy and fried a perfectly good graphics card I was fixing. The client was not happy, and I had to eat the cost of a new card, about 300 dollars. Has anyone found a decent budget station that actually lasts?

Warning: I used a generic power supply on a 2019 MacBook Pro and it fried the logic board.

My bench power supply just started acting weird during a board test

I was checking a laptop motherboard from a 2019 Dell, trying to find a short on the 3.3 volt line. I had my Rigol DP832 set to 3.3V and a 3 amp limit, like I always do. Out of nowhere, the voltage reading on the display started jumping around, like from 3.3 to 4.1 and back, even though the output felt steady at the probes. I mean, it was fine last week. I shut it off, opened it up, and blew out all the dust, but the problem came back after ten minutes. I'm thinking it might be a bad capacitor or a loose connection on the display board itself. Has anyone else had a Rigol supply do this? I'm not sure if I should try to fix it or just start looking for a new one.