c/electronics-repairers

That 'simple' capacitor swap that turned into a 3 day nightmare

I picked up a 2012 Samsung plasma TV last week, dead power supply, figured it was just a few bad caps on the primary side. Popped the board out, saw three bulging caps, replaced them all in 20 minutes flat. Plugged it in and it blew the main fuse instantly, so I spent the next 2 hours chasing down a shorted MOSFET that I missed because it was hidden under a heatsink. Then after I got that fixed, the standby voltage was still off by a whole volt, turned out a resistor had drifted way out of spec from heat stress. Two more days of swapping parts and checking datasheets before I found a tiny crack in the solder joint on the main transformer. The whole job I thought would take an afternoon took me 3 full days of after work tinkering. Has anyone else had a simple capacitor job blow up into something way bigger like this?

That one customer who brought in a TV with a bullet hole in it

Last Tuesday a guy walks into my shop with a 55 inch Hisense. He sets it on the counter and there is a clean bullet hole right through the center of the screen. I asked him what happened and he just shrugged and said 'target practice went wrong.' I told him the panel is shot, literally, and a replacement cost is more than the TV. He got mad and said I was just trying to upsell him on a new one. I spent 10 minutes explaining how LCD panels work and he still left thinking I was scamming him. Has anyone else had a customer bring in something that was clearly a total loss but refused to believe it?

Finally fixed that power supply issue I've been chasing for months

I had this old Kenwood amplifier come in last Tuesday that kept shutting off after 10 minutes. Drove me nuts checking caps and transistors for hours. Turned out to be a cracked solder joint on the relay driver pin, barely visible even under my magnifier. Reflowed it with some fresh 63/37 solder and she's been running solid for a week straight now. Cost me maybe 20 cents of materials and a half hour of my time. Anyone else had a tiny little thing like that hide from you for way too long?

Swapped a $2 fuse for a customer and they asked for a $50 discount on the service call

Got a call about a dead microwave, found the internal fuse blown, replaced it in 5 minutes with a part I had in my pocket, and the guy tried to haggle me down from my $60 flat rate because "it was just a fuse" - anyone else have people argue your pricing based on the part cost?

Unpopular opinion: Those fancy desoldering stations are overrated

I spent 3 years thinking I needed a $300 Hakko desoldering gun to do proper board work. Then I watched a guy at a shop in Austin pull a chip off a multi-layer board using just a cheap solder sucker and flux. He did it in under 2 minutes with zero lifted pads. That convinced me to practice more with basic tools instead of throwing money at gear. Has anyone else found a simple tool they underestimated for years?

Serious question, did I mess up choosing lead free solder?

I had to pick between leaded solder and lead free for a repair on a vintage radio from the 60s. Went with lead free since the customer mentioned kids around the house, but now the joints look brittle and I'm worried about long term reliability. Should have just used the good stuff and warned them to wash hands. Anyone else run into this catch-22 on older gear?

PSA: That time a client's home theater in Austin taught me about heat damage

I was installing a new receiver and amp setup for a guy near downtown Austin last summer. When I pulled his old gear out of the cabinet, the thermal paste on the chips had turned to dust and the capacitors were bulging. The whole rack was stuffed in a closed cabinet with no airflow. Some guys say heat sinks and fans are overkill for home audio gear, but I just saw $3,000 in fried parts. Do you think a few extra vents or a small vent fan is worth the hassle, or do you leave it up to the customer?

Just crossed 200 board repairs and nobody talks about the real burnout point

Honestly, I hit my 200th logic board repair last week on a late 2013 MacBook Pro. I thought I'd feel proud but instead I just felt tired. Ngl, most people hype up the first 50 or 100 as the big milestones, but 200 is where you start questioning if you even like soldering anymore. The repetitive thermal pad swaps and corroded charging ICs just grind you down. Has anyone else hit a weird number like that where the excitement totally flipped?

Recapped an old stereo amp and got a nasty hum instead of clean sound

I swapped out all the electrolytics on a 1980s Kenwood KA-7100 last weekend, but now it puts out a 60Hz hum that gets louder with volume. Triple checked my solder joints and polarity, everything looks clean. Did I maybe disturb a ground loop in the process or pick the wrong replacement caps? Anyone run into this ghost hum after a recap job?

Caught a tiny mistake in a power supply that had me stumped for 2 days

Was fixing this old Dell monitor power supply from 2012 and kept getting no output. I checked all the big stuff like caps and diodes but it was a cracked solder joint on a tiny resistor near the optocoupler. Took me 2 hours with a magnifying lamp to spot it because it was hidden under some glue. Anyone else ever wasted time on something that small?

Overheard a guy in a workshop saying hot air rework stations are overkill for most board repairs

I was at a parts counter in Portland last Wednesday picking up some caps and this older repair guy starts talking to the clerk about how he fixes nearly everything with just a soldering iron and flux, no hot air gun. He said something like 'if you need hot air for a simple capacitor swap, you're compensating for bad technique' and it really made me think about how much gear I've bought that I barely use. Has anyone else scaled back their repair kit and found they actually do better work with less?

Unpopular opinion: flux pens are way better than paste for tiny SMD work

I tried a flux pen for the first time last week on a busted phone board with 0402 resistors I kept losing. I figured paste would be fine but the pen let me put just a tiny dot exactly where I needed it. No splatter, no cleanup like paste always gives me. Has anyone else switched over from paste and found it works better for fine pitch stuff?

TIL those cheap solder sucker pumps are actually decent if you know the trick

I was dead set against using those $5 spring loaded desoldering pumps for years. Always thought they were junk compared to my old Edsyn vacuum station. Then my station died last month and I grabbed one from Harbor Freight just to get through a job. Gotta clean the tip on a brass sponge every 3-4 pulls and it works way better than I thought. Anyone else found a cheap tool that surprised them?

Just hit my 100th motherboard reball... never thought I'd get here

Been fixing game consoles on the side for about 2 years now. Last night I realized I've done over 100 reball jobs on PS4 and Xbox boards. I remember my first one took like 4 hours and I still screwed it up... cracked the chip. Now I can knock one out in 45 minutes easy. It's wild how much repeat business I get from local shops too. Has anyone else tracked their repair counts and gotten surprised by the numbers?

Saw a guy at the co-op last week try to reflow a Xbox with a $20 heat gun, melted the whole CPU socket

That 'no clean' flux I tried left a crusty mess on a vintage board

I was fixing an old stereo receiver from the 70s this weekend and figured I'd save time with that no-clean flux. Big mistake. After reflowing some joints on the power supply board, there was this white crusty residue everywhere that looked like corrosion. I spent 2 hours scrubbing it off with isopropyl and a toothbrush, way longer than just using regular flux and cleaning it right the first time. Has anyone else had that stuff leave a weird film on older boards?

Appreciation post: The guy who taught me to check capacitors with my thumb

Some dude on a forum years back said if a cap feels warm to the touch before you even power it on, it's already dead. I laughed it off until I found a swollen 470uf in a monitor that was only 3 months old, warm as a coffee cup. Has anyone else got a weird trick that actually works every time?

Pro tip: check the power cord before you crack open the device

Spent 45 minutes diagnosing a dead monitor at the thrift shop on Broadway last week. Turned out the cord was chewed through right behind the ferrite bead. Now I check cables first every time before I even grab a screwdriver - who else has a simple check that saves them hours?

PSA: Fixing a dead power supply at the Seattle co-op changed my whole method

Guy brought in a 2012 Dell that wouldn't even twitch. No lights, no fan, nothing. I spent an hour checking caps and diodes like always. Turned out it was a cracked solder joint on the main AC input connector. Right where the board flexes. Now I always hit those spots first with a magnifier before I start probing around. Anyone else ignore the obvious stuff for too long?

My old coworker swore by canned air for cleaning out power supplies

I worked with this guy Dave at a repair shop in Cleveland for about 3 years. He insisted on using canned air blasts directly into fans and transformers on every single power supply that came across our bench. I thought it was fine until I started noticing more intermittent failures on units he'd cleaned compared to my brush-and-vacuum method. Last month I actually tested 20 power supplies he'd serviced against 20 I'd done, and his had a 40% higher rate of failing under load within a week. I still brush out the big stuff, but I wonder if the cold shock from the air was cracking tiny solder joints. Anyone else notice this pattern with canned air on older gear?

First time I used a hot air rework station on a Gameboy Advance

Picked up a used Hakko 858D last month for 65 bucks. Tried removing a messed up power switch from a GBA that would only turn on if you held it at an angle. Got the board too hot on the first attempt and lifted a pad. Learned the hard way that preheating the whole board at 150C for a few minutes makes a huge difference. Second attempt worked perfectly with some low-temp solder added first. Has anyone else wrecked a board learning rework and found a better way to practice?

Warning: That cheap thermal paste you bought might be fake

I bought a 10 pack of "Arctic" thermal paste on Amazon for $8 last month for a batch of laptop repairs. First few jobs went fine, but then I had a Dell XPS 15 overheating after a CPU re-paste. Cracked open the tube and the stuff was grainy and separated like bad mayonnaise. Turns out there's a ton of counterfeit thermal paste floating around that doesn't transfer heat right. Has anyone else run into fake components that looked legit but failed on you?

Why does nobody talk about thermal paste drying out on power supply components

I was fixing a 10 year old TV last week and noticed the PSU had crusty thermal paste on the main mosfets... runs way cooler after I cleaned and reapplied it. Does anyone else bother checking this, or am I just being too picky about stuff that'll fail anyway?

Found a short in a customer's Xbox at my shop in Austin that changed my whole approach

I had this Series X come in with no power at all, and after wasting 2 hours checking the PSU I finally found a tiny whisker of solder bridging two pins on the HDMI retimer chip. Now I check every board under a scope before I even plug anything in - has anyone else had a hidden solder ball cause a crazy issue like that?

TIL those cheap capacitor testers on Amazon are wildly inaccurate

I was fixing an old receiver from the 80s and used my $15 component tester on some caps. It said they were all good but the thing still wouldn't power up. Decided to actually desolder them and check with a $40 multimeter from Fluke and 3 out of 4 showed way low capacitance values. Found a video from a guy in Texas who tested 10 of those cheap testers against a proper bench meter and every single one was off by at least 20%. Anyone else waste hours chasing ghosts because of bad gear?