c/electronics-repairers

3

wesley_martin•1d ago

Should we trust freeze spray or just use a heat gun for finding bad caps?

I had a dead monitor last week and tried freeze spray on about 30 caps one by one... took forever and I still didn't find the bad one. Then I just used a heat gun on the board and watched the screen flicker back to life when I hit one area. Is the freeze spray trick actually faster for anyone else or is it just a waste of money?

8

ellis.mia•2d ago

Hit 500 board repairs last month without tracking it

Been doing console and phone board work for about 4 years now. Last month I passed 500 repairs without even noticing the milestone. Anyone else lose count after a while or do you keep a strict log?

30

butler.finley•4d ago

Spent 6 hours troubleshooting a capacitor that wasn't even bad

Had a power supply that kept shutting off after 30 seconds. Checked all the big capacitors with my ESR meter, nothing looked wrong. Replaced them anyway because I was sure that was the issue. Finally traced it to a cold solder joint on the main transformer pin. Fixed it in 2 minutes with a touch of the iron. Has anyone else spent way too long chasing a ghost like that?

2

cora_scott77•5d ago

Threw away $60 on a cheap soldering station last month

Bought one of those no-name 60W stations off Amazon for $60 figuring it would be fine for occasional use. The tip temperature was all over the place, like 100 degrees off from what I set it to. Fried two PCB pads on a keyboard repair before I wised up and just bought a Hakko FX-888D. Should have listened to the guy in the forum who said to skip the cheap stuff. Anyone else learn this lesson the hard way?

16

lopez.simon•7d ago

My Hakko FX-888D made me realize my old Weller was junk

I compared them side by side on a stubborn ground plane joint and the Hakko heated up in 15 seconds while the Weller took over a minute. The tip temp on the Weller was all over the place too. Anyone else notice how bad older Wellers drift after a few years?

6

ray363•7d ago

Had a talk with an old radio guy at a garage sale that made me rethink how I clean flux

I was digging through a box of old test leads at this guy's sale in Portland last Saturday, and he saw me scrubbing a board with isopropyl and a toothbrush. He said 'you're just pushing the junk around, try distilled water and a soft paintbrush instead, let it dry slow.' I laughed it off at first, but I tried it on a crusty old VCR power supply this morning and it worked way better. Has anyone else switched up their cleaning method like that?

5

lucashart•13d ago

Pro tip: Stop using compressed air to clean power supplies unless you vacuum at the same time

Was reworking a rack of server PSUs at a client site in Portland last Tuesday. Guy I was working with saw me blast air into a fan and just shook his head. Said all I'm doing is shoving dust deeper into the windings and bearings. He showed me his method - hit it with air but have a vacuum right at the exhaust port catching everything. Tried it on a unit that was clearly clogged. After cleaning, the fan spun up smoother and the unit ran 8 degrees cooler on the load test. Been doing it that way for a week now. Anyone else clean them differently?

12

jamesfox•13d ago

Vent: Stop using solder wick for everything when you should just flux it

I was over at Mike's shop last Thursday watching him try to desolder a through-hole cap on a Pioneer receiver board. He spent 5 minutes with the wick, pressing down hard, lifting pads, making a mess. I told him to just add fresh flux and hit it with the iron for 3 seconds. Came right off. I see this all the time - people think wick is magic but it just pulls heat away and rips traces if you don't prep right. Has anyone else noticed new guys refusing to use flux first?

14

taylor.amy•15d ago

Found out solder fumes can mess with your lungs long term

I was reading through some old trade journals from 2019 I found at a surplus store in Denver. One study said rosin core solder smoke has chemicals that build up in your system over 10-15 years. I always just used a fan on my bench but now I'm looking at those fume extractors. Anyone else use a serious respirator or just a basic setup?

18

josephbutler•16d ago

Firmware updates from the manufacturer vs. third-party patches for old routers

I had a Linksys WRT1900ACS that was stuck on a 2019 firmware. Tried running DD-WRT on it instead. Night and day difference. The official firmware was slow and kept dropping connections. DD-WRT gave me VLAN support and actual QoS that works. Has anyone else had better luck with third-party firmware than sticking with stock?

11

the_holly•16d ago

Used to laugh at guys who spent $300 on a soldering station. Then I bought a Hakko FX-888D and holy crap I was wrong.

I was hardcore team $30 Amazon special for like 5 years. Told everyone spending more was a scam. Then my buddy brought his Hakko to a group repair thing last month and I tried it. Temperature actually stayed where I set it. Tips didn't oxidize in a week. Finished a controller board rework in half the time. Went home and ordered one that night. Anyone else have a tool they were dead wrong about?

20

claire_ramirez•17d ago

Thought ultrasonic cleaning was snake oil until a crusty logic board fix changed my mind

Swore by contact cleaner for years but after a 2009 MacBook board with crusty corrosion on a job in Austin last month, threw it in the ultrasonic tank and it booted first try, anyone else have that moment where a tool they doubted totally proved them wrong?

20

andrew_rodriguez•17d ago

That capacitor swap that fixed a 15 year old monitor's ghosting issues

I had this old Dell 2001FP sitting in my shop for years with terrible ghosting on dark scenes. Swapped out three bulging 1000uF caps near the power supply on a whim last Saturday. After powering it back up the text was crisp and the motion blur was GONE. Has anyone else fixed ghosting with just a simple capacitor replacement?

24

nancygrant•18d ago

Spent 2 years cleaning flux with the wrong kind of brush until a repair buddy set me straight

So I'm working on this old receiver from the 70s, covered in that crusty rosin flux, and I'm scrubbing with these cheap nylon brushes from Harbor Freight. My buddy walks in, takes one look, and asks why I'm leaving a fuzzy residue everywhere. Turns out those brushes were way too soft and had fibers that just smeared the flux around instead of lifting it. He handed me a horsehair brush he bought for like 5 bucks at an art supply store near Denver, and the difference was night and day. Has anyone else had a similar facepalm moment with a basic tool you thought was fine?

26

terry_carter15•18d ago

Warning: That cheap $15 soldering iron from Amazon almost burned my bench down last month in Phoenix

I was in a rush to fix a power supply for a guy's TV and grabbed this no-name iron I'd bought online. It seemed fine for little jobs but the tip got loose, then the whole handle started smoking. I'm talking real smoke, not flux. Had to unplug it fast and throw it outside. I've been fixing electronics for like 8 years and never had that happen with my old Weller. Anyone else had a cheap tool go bad on them like that?

8

oliviagrant•20d ago

That capacitor drain moment when I realized I was testing backwards for 2 years

I was troubleshooting a power supply board in my garage last month and couldn't figure out why my multimeter kept giving weird readings. Turns out I had been testing capacitors without discharging them first, so I was just measuring stored charge instead of actual circuit values. Has anyone else spent way too long on a basic habit they thought they had down?

2

riveradams•22d ago

Had a plasma cutter acting weird for 6 hours before I found the issue

Was cutting some 1/4 plate and the arc kept sputtering. Spent 4 hours checking gas lines and tips before I realized the ground clamp was just loose on the bench. Anyone else ever waste a whole afternoon on something this stupid?

12

nathanj56•23d ago

Tried reflowing a motherboard with a heat gun and ended up melting a capacitor

I had an old Dell laptop from 2012 with a dead GPU and decided to try the heat gun reflow trick I saw on YouTube. Set it to 350 degrees and held it there for about 2 minutes, but I guess I got too close because a small capacitor next to the chip just bubbled up and melted off the board. Learned the hard way that those cheap infrared thermometers from Harbor Freight aren't accurate enough for this kind of work. Anyone else ruin a board trying to save a few bucks on proper gear?

5

blakem37•24d ago

Pro tip: check your isolation transformer before you assume it's working

I was in my basement shop last Thursday trying to troubleshoot a buzzing old tube radio from the 50s, and I spent a solid hour chasing a phantom ground loop. Turns out the isolation transformer I plugged it into had a cracked winding and was feeding line voltage straight through. Has anyone else had a supposedly safe tool actually make things sketchier?

14

emery19•29d ago

Wasted $80 on a 'professional' solder station from a no-name brand

Bought this cheap station on Amazon and it melted down on my third joint - smoke everywhere and the tip fell apart. Anyone else had luck with a specific brand under $150 or should I just save up for a Hakko?

22

robin_roberts84•1mo ago

Hit 500 logic board repairs this month and it got me thinking about quantity vs quality

I just crossed 500 logic board repairs in my home shop outside Denver. Halfway through I noticed my success rate dropped from 92% to 84% around the 300 mark because I was rushing to hit numbers. The other half I slowed down and got picky about which boards I took on, and my rate climbed back to 90%. So which matters more to you guys in this trade - how many repairs you do or how well you do them? I'm still trying to decide where I land.

13

terry_jones•1mo ago

Tried using isopropyl alcohol to clean a dirty potentiometer... big mistake

I had an old Pioneer receiver with scratchy volume control. Read online that 99% IPA would clean it out fine. Sprayed some in there and it worked for about 2 days then got worse than before. Turns out the alcohol removed what little lubricant was left and the wiper started wearing down the track faster. Now I only use Deoxit F5 for pots. Anyone else ruin a pot with alcohol before figuring this out?

11

elizabethhayes•1mo ago

Changed my mind about ultrasonic cleaners after talking to a guy in Denver

I always thought ultrasonic cleaners were overpriced toys for hobbyists until I spent 20 minutes talking to a repair shop owner in Denver who swore by his. He told me he pulls corroded board connectors from old consoles and gets them working again after a 5 minute cycle with the right solution. Has anyone else seen a real difference in salvage rates after switching to one?

4

patricia_schmidt14•1mo ago

Found a trick for cleaning flux off boards with something cheap I already had

So I've been using isopropyl alcohol and a toothbrush forever to clean up after soldering. Works fine but takes forever and uses a ton of wipes. Last week I was fixing a power supply for a buddy and the flux was crusted on bad. I grabbed some... denture cleaner tablets from the bathroom. Dissolved a couple in warm water and dropped the board in for like 10 minutes. Rinsed it off and the flux was completely gone. No scrubbing. Anyone else tried this or got a better hack for stubborn flux?

3

lilykelly•1mo ago

Heard a customer say 'the solder joints look fine' after bridging 4 pins on a board repair

Was helping a buddy at his shop in Austin last Tuesday when some guy dropped off a monitor with a blown cap. He tried fixing it himself and insisted the solder joints were fine. I counted 4 bridged pins on the main chip. People really need to invest in a $15 magnifying lamp before they fry a whole board. Anyone else see a ton of these half-assed DIY jobs rolling in?