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Power supply blew up today!

bigboxes

Lifer
Went to plug it in and the sparks flew and I saw flames inside. I immediately unplugged the sucker. There was a plume of smoke in the air. Fun stuff! Waited awhile and plugged it back in to fire it up. Dead. Bummer.

The bad news? It was my first power supply that I bought ten years ago for my first build. An Antec 300W model. I immediately went out and bought a brand new Antec Earthwatts 380W PSU from Fry's for $30 (on sale). It's this model: Newegg link The old pc booted right up.

I took apart the old power supply. I couldn't find any damage. No burn marks. No bulging capacitors. No scorched circuit boards. Nothing. Maybe the small white fuse I saw inside is blown. Maybe I'll replace that later just for fun.

Of that first system I've had the mobo died (Abit KT7A-RAID), the video card died (ATI Radeon 64 VIVO), the hard drive died (Maxtor 10gb), and the cd drive died (Yamaha SCSI). The ram (Kingston PC133 SDRAM 256gb x 3) became outdated. The sound card was some soundblaster knockoff that never worked right (crappy drivers). I don't use Windows 98SE anymore. I still use my Cooler Master ATC-200 aluminum case. That was a great case!

Anyone else get bummed out when your old parts die? I gotta admit that the motherboard and video card's demise made me depressed. I don't feel the same when my four year old DFI board died. Nor when my Klipsch Promedia 2.1 speakers started flaking out. Nor when my Mitsubishi CRT started dying a couple of years ago. Nor when my 9800XT stopped working. But for some reason my the parts of my first build meant a lot to me. I still have my Athon Thunderbird 1200 cpu, but I'll never use it again because I have 3 faster Socket A processors vying for the one available motherboard. Sigh.
 
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Well ten years isn't too bad IMO. Caps probably failed (there are failure modes where they don't always vent/bulge, or they vent out the bottom which can be hard to spot unless you remove the cap). With any luck, hopefully you'll get ten more years out of the new power supply. 🙂

I rarely keep parts long enough for failure to be an issue. 😛
 
The fuse is probably open. Replacing it will most likely result in another pyrotechnic display along with another spent fuse.

Most likely you had a rectifier or TRIAC fail. These are those little black square things bolted to the heatsink.
 
The fuse is probably open. Replacing it will most likely result in another pyrotechnic display along with another spent fuse.

Most likely you had a rectifier or TRIAC fail. These are those little black square things bolted to the heatsink.

Good to know. I really didn't have any illusions of fixing the PSU. Just sad about it's demise. 🙁
 
A 6800GT in my old A64/SLI box died some months ago, I've been bummed about it for a while. Paid $350 for that thing back in the day :| Other than that, no hardware deaths due to anything other than lightning several years ago. A lot of my hardware isn't too important to me anymore, but I would be very sad if my old A7N8X died - it was my main rig for some 6 years (even survived lightning + failed power supply).
 
Lol, Rubycon, A good friend of mine had a fuse blow in his PSU, after the autopsy in which we discovered it, we decided to solder a comparable Amperage automotive fuse in its place. Upon firing it up, we were greeted with yet another "pyrotechnic" display, lol.

Of all my failed components the one I missed the most was my DFI Lanparty Mobo, RIP!
 
lets see how much dust was in that puppy 🙂

ibm got it right by putting air filters for large particulate in front of the air intake lol
 
lets see how much dust was in that puppy 🙂

ibm got it right by putting air filters for large particulate in front of the air intake lol

There was suprisingly little. I try to periodically blow out the dust, but at least whenever I work on a machine.
 
Just a suggestion to anyone - if you plug in your PC, and your PSU sparks, play it safe and don't plug it in again 😉

You're lucky it didn't blow stuff up the second time around.
 
Lol, Rubycon, A good friend of mine had a fuse blow in his PSU, after the autopsy in which we discovered it, we decided to solder a comparable Amperage automotive fuse in its place. Upon firing it up, we were greeted with yet another "pyrotechnic" display, lol.

Of all my failed components the one I missed the most was my DFI Lanparty Mobo, RIP!

I did that with a larger CRT monitor. Obviously, something else must have failed if it kept blowing fuses.
 
Well, I never plugged it in all the way when it arced. I didn't know what the cause was. There's a first for everything. Live and learn. D'oh!

Once you let the magic smoke out, what did you think was going to happen? If it "blew up" and "the sparks flew and I saw flames inside", what good could come from plugging it in again and risking another fire display?
 
Once you let the magic smoke out, what did you think was going to happen? If it "blew up" and "the sparks flew and I saw flames inside", what good could come from plugging it in again and risking another fire display?

This reminds me back in October 2006 when my Liberty 620 (then powering an A8N32-SLI FX60 1950XTX system) went flash bang. Except it did not exactly go flash bang - the first time.

I was just casually using the system looking at a PDF document when it just turned off. My desk light also went off which I thought was strange. Then I smelled that familiar smell of burning electronics (phenol resin). So I immediately pulled the power cord and started looking around but could not find anything.

I also received a call that the circuit I was using had tripped off line. 😱 The circuits are monitored, fed balanced (240V 60Hz) power and things like arcing (RF) will trip them too. Of course overcurrent and short protection wraps up the deal. On an interesting note when I first received this PSU it would trip the circuit every time the PC was turned on. Turns out the APFC circuit causes an RF chirp which triggers an arc fault condition. The engineer allowed this circuit to have its threshold adjusted so this PSU would work on this circuit.

So what happened is the PSU faulted and the circuit tripped so fast there was no time for fireworks! When the PSU was removed from the case a piece of one of the rectifiers fell out!

This unit was then handed over to my broker who then (safely) tested it with a long cord. I was told that upon plugging into a power source (nothing hooked up to DC side) copious amounts of sparks and popping were present similar to small fireworks. The internal fuse opened that stopped this. He said that the sparking/buzzing while loud would not have presented a hazard to myself or immediate surroundings and is common in the home environment where standard fuses/circuit breakers are used to protect branch circuits.

So to answer the question as to why would you plug something in again after it goes bang? Just to be sure! 😛
 
This reminds me back in October 2006 when my Liberty 620 (then powering an A8N32-SLI FX60 1950XTX system) went flash bang. Except it did not exactly go flash bang - the first time.

I was just casually using the system looking at a PDF document when it just turned off. My desk light also went off which I thought was strange. Then I smelled that familiar smell of burning electronics (phenol resin). So I immediately pulled the power cord and started looking around but could not find anything.

I also received a call that the circuit I was using had tripped off line. 😱 The circuits are monitored, fed balanced (240V 60Hz) power and things like arcing (RF) will trip them too. Of course overcurrent and short protection wraps up the deal. On an interesting note when I first received this PSU it would trip the circuit every time the PC was turned on. Turns out the APFC circuit causes an RF chirp which triggers an arc fault condition. The engineer allowed this circuit to have its threshold adjusted so this PSU would work on this circuit.

So what happened is the PSU faulted and the circuit tripped so fast there was no time for fireworks! When the PSU was removed from the case a piece of one of the rectifiers fell out!

This unit was then handed over to my broker who then (safely) tested it with a long cord. I was told that upon plugging into a power source (nothing hooked up to DC side) copious amounts of sparks and popping were present similar to small fireworks. The internal fuse opened that stopped this. He said that the sparking/buzzing while loud would not have presented a hazard to myself or immediate surroundings and is common in the home environment where standard fuses/circuit breakers are used to protect branch circuits.

So to answer the question as to why would you plug something in again after it goes bang? Just to be sure! 😛

Cliffs? 😀

Oh yeah, that smell..... When I was in college I worked as the lab assistant to the Electrical and Electronics Instructors. Oh the number of 1st year student meters they'd hand me to "repair" that had that smell.
 
Ive had my 3.06 P4 ASUS system(w/Lian Li case) now for a long ass time. If anything should ever happened to it, that would make me sad as everything (ie, all the software & hardware) works so well & is incredibly interoperable. Ive done a lot (& still do every day a lot ) of creative stuff on that machine for a lot of people.

In the many years now since I built it, Ive had only one HDD & one PSU go. When someone reports all kinds of pieces blowing out of their system I always wonder if it isnt because their PSU is going bad (ie, improper voltages) that is the cause & taking out the hardware. Therefore, I recommend that people always buy high quality PSUs & check the supply voltages from time to time to ensure everything is reasonably in spec. Usually you can display the 12 & 5 Volt levels from the BIOS screen.
 
Cliffs? 😀

Oh yeah, that smell..... When I was in college I worked as the lab assistant to the Electrical and Electronics Instructors. Oh the number of 1st year student meters they'd hand me to "repair" that had that smell.

That reminds me of the Simpson 260. Staple diet for electricians in training. Leaving it on OHMS or AMPS (shudder) as the probes were stuck in a wall socket was FUN! :biggrin:

Leaving the leads connected (red lead plugged into 10A UNFUSED) and testing voltage of 144 volt UPS battery bank is like the Delorean hitting 88 mph. You will see some serious sh!t!
 
That reminds me of the Simpson 260. Staple diet for electricians in training. Leaving it on OHMS or AMPS (shudder) as the probes were stuck in a wall socket was FUN! :biggrin:

Leaving the leads connected (red lead plugged into 10A UNFUSED) and testing voltage of 144 volt UPS battery bank is like the Delorean hitting 88 mph. You will see some serious sh!t!

Been there done that... :biggrin: I had bypassed the fuse with solder because I could not find a fuse that fit so figured I'd just risk it...

So I go to test a socket and set it to volt AC but accidentally made it jump too far and it went to amps. I put it in, all I her is a TOCK! sound. Was kinda awkward as it was not the typical POOF! with sparks that I'd expect. Then I noticed the knob was at amps, I'm like "shit!". I opened up the multimeter to see the damage, the solder exploded everywhere inside LOL.

So much for that one. :biggrin: Ended up buying another cheapy one at Canadian tire.
 
That reminds me of the Simpson 260. Staple diet for electricians in training. Leaving it on OHMS or AMPS (shudder) as the probes were stuck in a wall socket was FUN! :biggrin:

Leaving the leads connected (red lead plugged into 10A UNFUSED) and testing voltage of 144 volt UPS battery bank is like the Delorean hitting 88 mph. You will see some serious sh!t!

I still have a couple of them.
260_black-w.jpg


Oh the number of those I repaired.... 🙄
 
The fuse is probably open. Replacing it will most likely result in another pyrotechnic display along with another spent fuse.

Most likely you had a rectifier or TRIAC fail. These are those little black square things bolted to the heatsink.

BINGO, they are three prong, soldiered to the circuitry board they produce incredible black smoke when they die. There are a few in every PSU always the main thing to check upon a PSU death. Prolly two dollars at radio snack lol.
 
The fuse is probably open. Replacing it will most likely result in another pyrotechnic display along with another spent fuse.

Most likely you had a rectifier or TRIAC fail. These are those little black square things bolted to the heatsink.
A triac in a PC PS? Where?
 
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