c/cheap-diy-computer-fixes

Old office PC fan swap dropped my temps by 12 degrees for $9

My Dell OptiPlex from 2013 was running hot, like 88c under load, and I was about to buy a new cooler for $40. Instead I grabbed a used 92mm fan from a local repair shop in Austin for $9, wired it to the motherboard header, and zip tied it to the existing heatsink. The bracket didn't fit, but that didn't matter, the fan sat flush enough. Temps dropped to 76c after a full hour of folding. The noise went up a bit, but for a machine worth maybe $60, this feels like a win. Has anyone else jury rigged a fan with zip ties instead of buying a proper mount, or am I just asking for the whole thing to shake loose eventually?

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the_james•1d ago

Refurbished mobo from eBay saved me $140, but the BIOS had a surprise

My 6 year old ASRock board died last month, so I grabbed a used one from an eBay seller in Ohio for $45 instead of the $185 new price. It posted fine, but the BIOS was locked with a supervisor password the seller never mentioned, and I spent 3 evenings trying jumpers and CMOS resets with zero luck before finding a free tool that dumped the chip. Have any of you had luck talking sellers into refunding part of the cost when they hide stuff like that?

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the_vera•1d ago

That $30 used power supply from a flea market lasted a whole 3 days

Bought a 600W unit off a guy in Austin for thirty bucks, plugged it into my old gaming rig, and it smoked out on Tuesday night mid-match. I know buying used PSUs is a gamble, but has anyone actually found a reliable cheap source for these things, or is new always the only move?

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willow732•5d ago

A coworker's 5 minute fix made me look at old laptops different

Watched this guy at the shop last Friday take a 2012 Dell that would not boot and just bend one pin on the RAM stick with a pair of pliers. Took him less time than I spend finding my screwdriver. I used to tell people to just buy a new board whenever older RAM acted up. He said the contacts just get worn down and need a bit of pressure, not a whole replacement. Since then I've tried it on two dead machines and both fired right up. That's $80 in parts saved just for paying attention to how someone else handles a stubborn stick. Anyone else got a dumb simple trick they learned from watching a coworker or friend that makes the expensive fixes feel like a scam?

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ivan_perez•5d ago

Thermal paste vs. $40 cooler, my Ryzen 2600 ran 14C cooler with the cheap fix

Had a used Ryzen 2600 hitting 91C under load, so I was about to drop money on a new tower cooler. Friend said try re-pasting with that $6 tube of Arctic MX-4 from Micro Center first, so I did and it dropped to 77C after a 30 minute stress test. Now I'm wondering if we're all overbuying coolers when old paste is the real culprit, or if that's just luck on older chips. Anyone else get a bigger win from a $6 tube than a $50 part swap, or did I get a weird one-off?

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dylan_green58•9d ago

Check your thermal pads before buying a whole new GPU, trust me

I was over at a friend's place in Austin last week, his 2018 RX 580 started hitting 95C and crashing mid-game. He was about to drop $250 on a replacement until I pulled the cooler off and saw the thermal pads had turned to powder. A $12 pad kit from Amazon and some fresh paste from my drawer fixed it in an hour. Anyone else find that old pads fail way faster than the chips themselves?

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susan_wells•11d ago

Paid $60 for a used PSU and it literally saved my dead PC

My old power supply died on a Tuesday night, no warning, just a pop and smoke. Local shop wanted $150 plus labor to replace it, which was more than my 8 year old build was worth. Found a used 650W unit on Facebook Marketplace for $60 from a guy who said he upgraded to a smaller case. Threw it in, wired everything up, and it fired right up on the first try. Ran a stress test for 2 hours and voltages held steady, so either I got lucky or that guy was honest. Anyone else ever bought a used PSU without getting burned, or should I expect trouble down the road?

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johns18•13d ago

That 'just use toothpaste' screen fix advice nearly killed my old monitor

That 'just use toothpaste' screen fix advice nearly killed my old monitor. About 3 weeks ago, a guy in a Facebook group swore toothpaste and a soft cloth would buff out deep scratches on my 2012 Dell monitor. I tried it on a small spot in the corner first, and it looked okay for like an hour. Then the whole area went cloudy and hazy, and now that part of the screen is permanently smeared even after cleaning it with alcohol. He said it worked for his phone screen, but LCD panels have a softer coating that scratches way easier. I ended up finding a used bezel with a good panel on eBay for $35, which was still cheaper than a repair shop but way more than the $2 toothpaste. Anyone else been burned by a 'kitchen cabinet' fix that worked on one gadget but wrecked another?

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hunt.rowan•14d ago

That $90 'gaming' power supply nearly torched my whole rig

Bought a cheap off-brand PSU on sale last month to replace a dying one in my old build. It worked for about two weeks, then started making this faint whine and the PC would randomly reboot during games. Pulled it out and the plastic around the 24-pin connector was actually melted, no joke. That $90 saved me $40 upfront but almost killed a $600 GPU. Anyone else get burned by these no-name PSUs, or is there a decent cheap brand that's actually reliable?

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nathanbennett•15d ago

Bought a $9 thermal pad instead of paste, GPU ran cooler somehow

I tried one of those graphite thermal pads on an old GTX 970 from a pawn shop in Columbus. The card idled 4 degrees cooler and the hotspot dropped like 8, totally opposite of what I expected. Maybe the paste I used before was just dried out, but the pad also means I never have to redo it. Has anyone else had a pad beat paste on a older card?

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riverp37•15d ago

The $3 thermal pad trick that had me questioning 4 years of paste

I always used thermal paste because every guide said so, but after my laptop hit 95C in July I tried those cheap pink pads from a local shop in Austin. Dropped it to 78C and now I wonder how many fans I killed by being loyal to the tube. Anyone else switch and never look back?

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stone.evan•16d ago

Can we talk about thermal paste on old CPUs?

Pulled apart a 2012 Dell OptiPlex last night and the paste was basically rock dust, no wonder it was hitting 95C. Scraped it off with an old gift card and used a $6 tube of Arctic MX-4, temp dropped to 61C under load. Anyone else skip the repair shop and just repaste their old office castoffs?

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nelson.finley•17d ago

Dollar store thermal paste gamble paid off after 2 crashes

My old 2012 laptop kept shutting down during summer, so I grabbed a $3 tube of thermal compound from the dollar store instead of the $15 name brand stuff. Slapped it on the CPU after watching a 10 minute video, and it's been running cool for 3 months now with no issues. Anyone else risk the cheap stuff on a machine they don't care much about?

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sethc12•17d ago

Stopped trusting that $15 paste after a buddy's tip saved my GPU

My friend Joe from Tulsa told me to ditch the expensive thermal paste and use the cheap white stuff from the hardware store, and after repasting my old 970 with it last week, my temps dropped 9 degrees, so has anyone else been burned by fancy paste that was just marketing?

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rowan666•18d ago

Pro tip: my $7 thrift store PSU beat my $50 cheap one

Picked up a used 400W Dell PSU for 7 bucks at a flea market in Austin and compared it to a no-name 600W I got online. Timed a stress test on my old i5 rig, the Dell held steady at 12.1V while the cheap one sagged to 11.4V and shutdown after 40 minutes. Opened both up, the Dell had proper heatsinks and a real fan bearing, the other one just had a sticker. Anyone else got a junk part that secretly worked better than the flashy option?

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derekthomas•18d ago

Old laptop hinge held together with zip ties for 8 months now

My 2014 Dell started cracking at the hinge so bad the screen would flop over, instead of paying $90 for a new lid I drilled tiny holes and ran 3 zip ties through the plastic frame. It holds the tension fine and looks janky but works, though the plastic is starting to stress a little. Has anyone else done an ugly repair like this that ended up lasting way longer than the factory part?

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wrenwilson•19d ago

A buddy's comment about his $8 garage sale PSU made me question my build budget

Last week my friend Rob showed me his whole PC running on a dusty old power supply he grabbed at a garage sale for $8. I laughed at first, but then he said 'it either works or it doesn't, and if it pops I'm out less than a pizza.' That hit different because I just dropped $110 on a new unit for my own rig after the old one made a weird noise. Now I'm wondering if I overthink this stuff, like is the peace of mind worth the extra cash or am I just feeding the fear? Has anyone else run a sketchy cheap PSU for years without issues?

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tessa_roberts1•19d ago

Thermal paste on a budget, this old-timer showed me up

At a salvage shop in Portland last month, this guy watched me grab a $3 tube of generic paste and laughed. Said he's been using the same $8 syringe for 9 years because he stores it in the fridge between jobs. He showed me his trick: warm the tube in your pocket for 10 minutes before applying, it spreads way thinner and you use half as much. Tried it on my buddy's old i5 rig, temps dropped 8 degrees versus my usual sloppy job. Anyone else got odd storage tricks for cheap parts that actually work?

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uma_reed26•20d ago

That $20 power strip saved me a $150 repair bill

Last Tuesday my desktop started randomly shutting off, and I was sure the PSU was toast. Before ordering a new one, I grabbed a cheap Kill A Watt meter from Harbor Freight and found the voltage dipping under load. Turned out the old surge protector I'd been using since 2019 was cooked, so I swapped in a basic $20 strip from Home Depot in Richmond. Has anyone else traced a flaky machine to a worn-out power strip instead of the actual components?

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alex_coleman•20d ago

Thermal paste on a budget, the $6 tube beat the $25 one

Tbh I always figured expensive thermal paste had to be better, but last month I rebuilt an old gaming rig on a tight budget. I grabbed a $6 tube of generic paste from a local electronics store in Austin and compared it to the $25 Arctic stuff I had leftover. After a week of gaming, the temps were within 2 degrees Celsius, so the cheap tube won for me. Has anyone else tried mixing budget paste with a used CPU cooler and seen similar results?

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amygonzalez•20d ago

Spent 3 years over-tightening every screw on my PC builds

My old PC kept crashing randomly and I blamed the RAM, turns out I was mounting the CPU cooler with way too much paste for two years straight. A single pea sized dot finally got temps from 85 to 60, so I guess I owe my CPU an apology. Anyone else discover a simple paste fix after fighting overheating?

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evan151•21d ago

Used to pay $60 for thermal paste jobs, now I use mayo in a pinch

Back in 2019 my laptop was overheating bad in Austin and I was broke, so I smeared some mayo from the break room on the CPU. It actually worked for like 3 weeks until I could get real paste from a buddy for $5. Has anyone else tried random food items as thermal goop, or am I the only weirdo?

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sarahsullivan•23d ago

That $30 'premium' thermal pad turned my GPU into a sauna

Bought a fancy graphene pad off Amazon last month to avoid repasting my old 1070, and the core temps jumped 15 degrees within a week. Swapped back to the $8 tube of Arctic MX-4 I had sitting in a drawer, and now I'm wondering if anyone else got burned by those overhyped pads too?

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alice_reed47•23d ago

Dust blower vs. air compressor, which one actually saves you money in the long run?

Stopped by a computer repair shop in Austin last week to grab a used fan for $5. The guy behind the counter was blowing out a motherboard with a pancake compressor. He said he's been using that $80 compressor for 6 years instead of buying canned air at $12 a can every couple weeks. My buddy swears by a $25 electric blower off Amazon, says it's quieter and good enough for his home rig. But I've seen both strip screws and push dust deeper into PSUs if you're not careful. So which route has actually worked for you without wrecking parts, and did the upfront cost really beat the canned air over time?

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leo_campbell•24d ago

Thermal paste vs. those cheap pad kits, the pad route saved my GPU last Sunday

I swapped a $6 pad kit onto my old RX 580 after the paste dried out and temps dropped 15 degrees, so why does everyone here keep pushing the messy paste method when pads are zero risk and take five minutes total, has anyone else made the switch?

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