c/electronics-repairers

Walked into a mom-and-pop repair shop in Fresno last weekend and got an earful

The guy running it told me he refuses to work on anything made after 2015 because the chips are too hard to source. Said he's sitting on a pile of dead Samsung TVs nobody can fix. Is that really where we're headed that older gear is the only stuff worth touching?

Guy swore solder paste was good enough for through-hole jobs

Had a dude on here tell me to stop using regular solder for through-hole repairs and just use paste with a hot air gun. Said it was faster and stronger. Tried it on a power supply board last Tuesday. three joints looked fine but one never wetted right and cracked after 20 minutes of runtime. Had to redo the whole thing with my iron and got it done right on the second try. Anyone else get bad advice from these forums that cost them time or parts?

Caught a motherboard rotting from the inside out on a routine check

Had a customer bring in a 3 year old laptop that was acting flaky... decided to open it up even though they said nothing spilled on it. The copper traces near the USB port were literally turning green and flaking off, all because of some cheap flux residue the factory never cleaned. I've seen this get worse over just 6 months in humid basements, but this one was in a normal office. Anybody else noticing boards from certain years turning into corroded messes faster than they should?

Tried using a hot air rework station on an old motherboard and melted a capacitor next to the chip

I was trying to remove a BIOS chip from a Dell OptiPlex 790 board to flash it for a repair. Set the temp to 350c and aimed the nozzle at the chip, but the cap right next to it just bubbled and popped off. Learned the hard way that Kapton tape is not optional for tight spaces. Anyone else have a close call with hot air damaging nearby parts?

Debate with a vintage radio guy made me question my whole approach to repairs

I was at a swap meet in Portland last weekend and got into it with a guy who restores old tube radios. He said if I can't trace the circuit with my own eyes and a multimeter before touching anything, I'm just guessing. That hit different because I've been doing board swaps on modern gear for years without really understanding the flow. Part of me thinks modular replacement is fine for speed, but the other part wonders if I'm losing the skill of actual diagnosis. Where do you all draw the line between efficiency and knowing the circuit inside out?

Why does every beginner think they can fix a power supply with just a multimeter?

I swear I see it at least twice a week where someone comes in with a blown power supply and they think poking around with a multimeter is all they need. I had a guy last Tuesday in my shop who spent two hours testing voltages on a dead SMPS and then got surprised when it still didn't work. Dude, you need an oscilloscope to catch that ripple noise and switching spikes, that's just basic stuff. I've been repairing these things for 12 years and half the time a cap looks fine but it's dried out inside causing all kinds of problems. A multimeter won't show you a failing cap under load, you need an ESR meter or a scope for that. Has anyone else seen this trend where people skip the proper gear and wonder why their repairs fail after a week?

Discovered my $20 soldering iron was actually better than the $150 station I bought later

Picked up a cheap Weller pencil from a pawn shop last year for $20, just as a backup. Used it for a motherboard repair yesterday and it flowed solder smoother than my fancy Hakko station. The tip actually held temp without bouncing around. Guess sometimes the old stuff just works better. Anyone else find their junk drawer tools outperform the high end gear?

PSA: Don't trust cheap thermal paste from Amazon bundles

I ordered a $12 repair kit off Amazon last month that came with a syringe of thermal paste. Figured it was fine for an old laptop I was reviving. After the CPU hit 95C under load and started throttling, I repasted with some Arctic Silver I had from 2019. Drop went to 72C. That cheap stuff was basically grease. Lesson learned: never use mystery paste from a random kit. Anyone else get burned by these bundle deals?

Guy at my shop swore by compressed air for cleaning motherboards, then blew a capacitor right off the board

I was helping a buddy troubleshoot a dead power supply last Tuesday and this older repair guy walks over, says "just blast it with air" and aims a 100 PSI nozzle at a 15 year old motherboard. Dust went everywhere, but so did a tiny capacitor that pinged off the wall. Has anyone else had a repair go sideways because someone was too aggressive with cleaning tools?

Pro tip: I swapped my cheap solder sucker for a real desoldering station last week

I kept fighting with that $12 plunger-style solder sucker on a vintage stereo board, burning pads and ripping traces. Picked up a Hakko FR-301 used off eBay for $180 and finished the job in half the time with zero damage. Has anyone else made the jump to a powered desoldering tool and regretted waiting so long?

Just realized I've been using the wrong iron tip for years

I was working on this old Pioneer receiver from the 70s last week, trying to desolder some caps on a crowded board. After 20 minutes of frustration, a buddy stopped by and asked why I was using a chisel tip for precision work. Told me to switch to a fine conical tip and suddenly the solder flowed like butter on those tight joints. Anyone else have a moment where a simple tool swap made you feel like an idiot for not trying it sooner?

TIL flux residue can fry a board even if it looks clean

I used to skip cleaning flux off after soldering if it looked fine. Last week a laptop board came back dead after 3 months and a microscope showed a crusty patch I missed. Has anyone else gotten burned by no-clean flux acting up later?

Question about a weird fix for a flickering monitor

I was at a swap meet in Portland last weekend and this older guy was telling me about a 2012 iMac with a backlight that kept cutting out. He said he fixed it not by replacing the whole board, but by just reflowing the solder on two specific capacitors near the power supply with a heat gun (he mentioned the C956 and C957, I wrote them down). He said it's held for over a year now. I'd always just swapped the whole power board in those cases. Has anyone else tried this kind of targeted reflow on older Apple stuff? I'm curious if it's a real fix or just a temporary band-aid.

Showerthought: That old receiver I found at a thrift shop just needed a $2 capacitor to sound perfect again

Picked up a dusty Pioneer SX-780 for $40 last Saturday, and after swapping out a single blown cap on the power supply board, it's running cleaner than my buddy's newer Yamaha - has anyone else had a cheap fix turn a junker into a daily driver?

I used to laugh at people buying those $40 thermal cameras for their phones, but diagnosing a short on a 2018 MacBook logic board last month completely changed my mind.

I finally caved and bought one after a tech in Denver swore by his, and pinpointing the exact overheated capacitor in under 30 seconds saved me from a pointless board swap.

Had a 2019 MacBook Pro come in with a swollen battery that was actively smoking

It was in my shop in Denver, and the owner said it just started smelling funny. When I opened the back, the battery pack was bulging and a thin wisp of smoke was coming out. I got it into a metal bin with sand, which is my go-to for this, and let it sit for a full day. The real problem was the adhesive Apple uses; it's a nightmare to remove safely once the cells are compromised. What's your specific protocol for a live thermal event beyond just the fire bag?

Working on a 90s arcade cabinet changed my view on cleaning boards

I was fixing a Street Fighter II machine at a retro arcade in Portland last year, and the owner insisted I blast the main board with compressed air before even looking at it. I did, and it blew a tiny surface mount resistor right off the board. Everyone says to clean first, but now I always check for loose parts with a magnifier and gently brush instead. Has anyone else had a simple cleaning step cause more damage?

Just saw a 2015 MacBook Air come back to life after a $2 capacitor swap

It had been a 'dead logic board' case for months, but a local shop in Tampa found the exact 0201 size cap that failed. Anyone else have a go-to source for those tiny SMD parts?

Spent three days chasing a phantom short on a 2018 MacBook Pro board, turned out to be a single grain of solder under a tiny capacitor.

Checked out a new repair shop in Phoenix and the soldering station setup was a real eye-opener

Honestly, I was at a place called Circuit Fix on 7th Ave last Friday. They had four Hakko FX-888D stations all lined up, but every single tip was completely oxidized and black. Tbh, it looked like they never cleaned them, just cranked the heat to max for every job. Ngl, I watched a tech there try to reflow a connector on a laptop board and it was a real struggle. Has anyone else seen a shop let their basic gear get that bad, and how do you even bring it up without sounding like a jerk?

Question about those cheap hot air rework stations versus a decent one

I bought a $70 no-name hot air station off a website last year, thinking it would be fine for occasional phone charging port swaps. The thing was a nightmare, the temp reading was off by like 50 degrees and the fan would surge. I finally spent $300 on a Quick 861DW last month and the difference is insane. The heat is steady, the airflow is smooth, and I'm not burning pads off anymore. It's cut my rework time in half on small boards. Anyone have a good middle-ground station they'd recommend for someone just starting out?

Pro tip: always check the power supply before you blame the main board

Last week in my shop, a customer brought in a gaming PC that wouldn't turn on, and he was sure the motherboard was fried. I pulled out my multimeter and found the 12V rail on his Corsair PSU was dead, so I told him he just needed a new power supply, not a whole new build. How many times have you seen someone jump to the most expensive fix first?

Finally gave up on the old hot air station and the difference is wild

For years I used a cheap hot air station from a starter kit, always fighting with it on small components. Last week I switched to a proper Hakko unit for a tough board repair. The precise temperature control and steady airflow meant I got a clean BGA reflow on the first try, something that used to take me three attempts. Has anyone else found that one tool upgrade just made everything click?

Shoutout to the tech who showed me a better way to clean flux residue

For years I'd just use 99% isopropyl and a brush, but a guy at a repair meet in Portland said to try a 50/50 mix of isopropyl and distilled water with a drop of dish soap. I switched six months ago and my boards look cleaner with way less scrubbing. Has anyone else found a better cleaning method that actually saves time?

I was reading an old repair manual and saw that a CRT television's flyback transformer can output over 25,000 volts.

Found that in a 1992 Zenith service guide, and it makes me wonder how many of you still work on tube-based gear and what safety steps you take for high voltage.