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the gutless, bloated, and fried power supply hall of shame

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    Re: the gutless, bloated, and fried power supply hall of shame

    Originally posted by coreAngel View Post
    ... What i still wonder is how could th is have supported the system with 256mb RIMM's a video card,adaptec scsi card,modem,sound and a pentium 4 1.4ghz processor two cd drives and 2 hdd's ...
    I keep alive a dinosaur P4P800 with 3.4 HT Preshott OCed to 4 GHz, ATI 9800 Pro GPU, 3MB of RAM in four sticks, SSD, HDD, DVD and no less than 7 fans onboard, and it just draws ~230W DC tops under full torture.

    So wattage-wise poor ole 250W Deers were up to the task.

    Now, the ripple your components must have been enduring ...

    Comment


      Re: the gutless, bloated, and fried power supply hall of shame

      Originally posted by momaka View Post
      We, the people at badcaps.net, love Rulycons!
      So, thank you for posting .

      Now, if you are a fan of recursion, then have a look here:

      and here:


      Basically, your PSU appears to have the same (or very similar) design as the first one I posted above, but with cap choices and heatsinks of the second unit.
      Full threads below, if you get a kick out of reading longs posts about crappy PSUs :
      Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!

      Technical discussion for power supplies. This covers PC supplies, and any other related power supply issue. When starting a new thread, please put the make AND model of your device in the thread title. Also be VERY descriptive of your issue, that way you'll get the best answer possible!




      Yeah, amazing indeed how such gutless units still continue to run. What's even more amazing is that the PSU you got has a self-oscillating 5VSB circuit without feedback that still works. Those designs usually send the semiconductors in the sky after a few years.

      I got a PSU similar to yours last summer. Off of Craigslist too, with bulged caps, but still working, so same deal like yours. I just finished posting it here:



      It's pretty bad, alright. But it could still be worse. Don't believe me? Look back in this thread if you have time. I think you would be pleasantly (or unpleasantly?) surprised .
      This one is not exactly a power supply but it is an Inverter, it's designed to convert 12vdc car battery power to 110 to 130 watt AC power and a USB port for charging...after being on this site, i knew i had to take it apart,because it failed after 1 year, the fan works but the caps look unusual, but the fan seems to not spin correctly (its a yateloon fan)
      Attached Files
      Yes i love Nichicon MUSE Audio Capacitors...they would look awesome all over any motherboard

      Comment


        Re: the gutless, bloated, and fried power supply hall of shame

        Originally posted by coreAngel View Post

        I took it home and the first thing i took a gander at was the PSU, and guess what i found a Deer PSU 250 watt max on a P4 system i was like oh deer, pun intended.
        Looks like the Deer I used with my first Athlon! LOL! (T-bird 900 Mhz) (Especially the darkened spots!)
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        Comment


          Re: the gutless, bloated, and fried power supply hall of shame

          Shame on you, Solytech...

          This thing managed to power a computer for 2 years and never failed. Pretty surprising!
          Attached Files

          Comment


            Re: the gutless, bloated, and fried power supply hall of shame

            That must be a 'flying transistor' mod, very 'cool'.

            Comment


              Re: the gutless, bloated, and fried power supply hall of shame

              Comment


                Re: the gutless, bloated, and fried power supply hall of shame

                Maybe it's for the 5vSB rail? That might get away without a heatsink.
                "Tantalum for the brave, Solid Aluminium for the wise, Wet Electrolytic for the adventurous"
                -David VanHorn

                Comment


                  Re: the gutless, bloated, and fried power supply hall of shame

                  OFC it is SB rail…there is no booster so the switchers will be far on left.

                  This is absolutelly normal.
                  Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

                  Exclusive caps, meters and more!
                  Hardware Insights - power supply reviews and more!

                  Comment


                    Re: the gutless, bloated, and fried power supply hall of shame

                    Originally posted by Pentium4 View Post
                    Shame on you, Solytech...

                    This thing managed to power a computer for 2 years and never failed. Pretty surprising!
                    https://www.badcaps.net/forum/attach...1&d=1449294660
                    Haha! At first, I didn't even notice anything wrong there. It wasn't until I read all of the replies after this that I realized what was wrong.

                    Wow, that is... shocking? ...or amazing?
                    Even though this IS for the 5VSB rail, I am surprised that it didn't fail within minutes. The older Deer/Allied/L&C PSUs tend to generate a lot of heat in soft-OFF/standby mode. I guess Solytech must have improved their 5VSB designs a little. My Deer DR-250ATX keeps the whole primary heatsink nice and warm (about 40-50C) in soft-OFF mode. So I would guess that transistor is dissipating no less than 1 Watt. If this was the case here with this PSU, the PCB underneath that transistor would definitely have become crispy, especially around the Collector pin. Then again, it's hard to tell with a PCB painted black.
                    Last edited by momaka; 12-06-2015, 03:10 PM.

                    Comment


                      Re: the gutless, bloated, and fried power supply hall of shame

                      Possibly there is already some PWM driver, if the unit is only few years old. EU regulations in this area already work for some time…and manufacturers tend to have single paltform for all markets.
                      Less jewellery, more gold into electrotech industry! Half of the computer problems is caused by bad contacts

                      Exclusive caps, meters and more!
                      Hardware Insights - power supply reviews and more!

                      Comment


                        Re: the gutless, bloated, and fried power supply hall of shame

                        Dell H240AS-00

                        I posted pics of this PSU before, and I seem to recall someone saying to replace a ceramic cap, but I looked and couldn't find that post.

                        Well .... you were right. I think it finally failed.
                        That computer was brought back to me, and had no power. No 5v stby

                        The picture tells it all! :P

                        She blowed up real good!
                        Notice the soot around the fuse! Holy moses! Somethin done gone bang for sure!

                        .. Looks like I have a power supply to fix

                        -Ben
                        Attached Files
                        Muh-soggy-knee

                        Comment


                          Re: the gutless, bloated, and fried power supply hall of shame

                          Looks like that ceramic cap is across Drain and Source on the FET behind it. Also note the small hole in the resistor too! Judging by the resistance value of that resistor, it is probably used as a Source resistor for the FET - and if it is, you might want to check the FET too. I see a 420V primary cap behind. APFC PSU? If yes, I bet that's all that is wrong with it.

                          Originally posted by ben7
                          .. Looks like I have a power supply to fix
                          Mmm-hmmm
                          Last edited by momaka; 12-07-2015, 07:17 PM.

                          Comment


                            Re: the gutless, bloated, and fried power supply hall of shame

                            Originally posted by momaka View Post
                            Looks like that ceramic cap is across Drain and Source on the FET behind it. Also note the small hole in the resistor too! Judging by the resistance value of that resistor, it is probably used as a Source resistor for the FET - and if it is, you might want to check the FET too. I see a 420V primary cap behind. APFC PSU? If yes, I bet that's all that is wrong with it.
                            Yes I am just about the check the FET and other primary side power devices.

                            And yes it has APFC! Somewhat surprising for a 240W PSU.

                            -Ben
                            Muh-soggy-knee

                            Comment


                              Re: the gutless, bloated, and fried power supply hall of shame

                              [Quick update]

                              (Will make new thread if I need to, but I don't at the moment. Don't want to hijack lol)

                              The main switching FET is shorted, the APFC FET is shorted, and the APFC diode seems unhealthy. (Measures 200 ohms both ways, and this is in circuit.)

                              The APFC FET shorted badly, I get 0.4 ohms on the + and - of the bridge rectifier. (All 4 bridge rect diodes test fine though, forward voltage wise.)

                              It's REALLY gone pop!...
                              No wonder why the fuse blew so hard!

                              An SMD diode and resistor have blown as well.

                              Edit: Holy crap! Gee, a switching controller chip on a daughterboard is burnt as well!...

                              -Ben
                              Last edited by ben7; 12-07-2015, 07:45 PM.
                              Muh-soggy-knee

                              Comment


                                Re: the gutless, bloated, and fried power supply hall of shame

                                As PhotonicInduction would say:
                                Awwwww. We POPed it!
                                I'd still try to repair it, though, just for fun. If you do that, then yeah, make a thread for it (and with more pictures of the carnage!)

                                Comment

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