Great video Ben. You showed that persistence pays off. Two items of note: 1) When replacing large capacitors, make sure they're discharged before working on them, especially if you've just had the unit plugged in. 2) A spot of silicone or hot glue to tack your modified capacitor to the board might be a good idea. Keep up the good work!
Great repair video. Some people may not realize that you need to pay attention to the polarity of those electrolytic capacitors. You could emphasize that in your next repair video. You mention that it takes time to get your components. Have you tried Digi-Key? That is who I have used in the past and they had great service.
+Pidasian Hippie Hmm... you're entirely right. I will make sure to emphasize that in the next video. I primarily use Mouser, Newark, and Ebay for parts but I'll definitely give Digi-Key a shot! Thanks!
Hi Ben, repair videos are cool and this one was very good, I am a old dude who is really a newbie when it comes to electyronics, so it's always inspiring to see the methodology of opening the box and finding the possible problem, testing solutions etc. I look forward to the next ones/ Keep on trucking !
Great job kid, very intellectual lesson, unfortunately I don't have the electrical experience to repair my POE switch, but I have to say congratulations and I have to say you have a good heart for doing what you do to help your school. Keep up the good deeds.
Great video Ben. I am by no means into electronics but I have ubiquity switch on hand that is not working. You gave me enough confidence and knowledge to start troubleshooting steps. Thanks!!
I know nothing about what you're doing, but these are pretty good learning tools. I loved the solar charger episode. Personally, I would love it if you mixed in some more really basic builds for newbies. It might not be what you're interested in, but it's just a thought.
You are getting better and comfortable in front of the camera. A simple video would be to show how to solder, I have seen so many videos all different, and I still have problems.
Hi Ben, thanks 4 this video! For a more complete info on this power supply, could you be so kind to tell me also the output voltage this power supply should provide o the load?
Much kudos to you on a successful repair, and especially in saving your school money. Now, let's see if I can take what you've demonstrated and save myself some money on repairing my 2716.
I see these fail the same way a lot. Problem is the small capacitor thats glued to the big 100uF shown in the video. Its something like a 47uf 25V an its called a bootstrap capacitor. Its only job is to provide power filtering to start up the supply when first plugged in. They often fail and are never noticed until after a power outage. When the power comes back on, the failed cap is unable to start up the supply. People assume some sort of power surge/spike killed the device during the outage but truth is the device failed a long time before the power outage. If the network box is powered by a UPS, this could be a very long time from when the cap failed to when it gets noticed. Replace that little guy and supply will come back to life. Do be sure to check the tall caps near the 6 pin plug. If they have any sort of bulge on the top, replace em.
You found it. I had the exact same problem - Dell 2Xnn series switch (mine is also a 2716; many of them share the same 5V 8A P/S) - and it had the same bad cap. It's C3, a 47µf 25v. Mine tested at 17µf. Replaced with 47µf 35v 5000hr part so it's unlikely to fail again for the lifetime of the switch.
Great video, and good work. Just to be nit picky though, those four controller chips you pointed out in the beginning aren't chips. They are magnetic couplers, required by the Ethernet specs. The controller chips are under the black heat sinks.
Ben Builds:, Those high voltage "Taicon" brand capacitors seem to be prone to having leakage and corrosion at the leads. I've seen it before numerous times.
nice video but ...how to fix a poe switch from ubiquiti (the main problem is about if you connect 2 more poe devices , the switch poe mode doesn't work well) ?
i have problem with planet FGSW 1816 hps its all lights ON and nothing working not even reset the led is blink underneath the circuit board continuously. what is this meaning or code for this led blinking.if any one know help is appreciate-able
Great repair video! I have two 5 port switch's that have the same behavior, they turn the light on "power" and "led Ports" but the led ports keep blinking, i've analyzed the board and doesn't see no capacitor's damaged, have 3 47uF 25V small capacitors and 2 100uF 25V a lil bigger ones, maybe its one of those? If u can please help me
+Ben Builds: It's blinking but not data transfer blinking, i had no data through, ive replaced the 2 100uF 25V capacitors and now i can have 2 PC's receiving internet when i plug a third the connection goes down, i might have to replace all the 3 47uF 25V capacitors too...
Any idea for ZYXEL switches what voltage must the internal PSU have ? I measure 3.3 on red and 5V on yellow and I have a feeling this should be 5 and 12 instead.
I blew a R 20 000 switch it still lights up but doesn't work I replaced a capacitor that that blew and the coil that burnt still no luck. Before it broke it would click like as if a relay was triggered but not exactly what the next step is. I haven't been able to find any wiring diagrams. It's a planet igs-10020hpt switch
Ha! I think the reason it failed at 5:30 was because you reversed the polarity of your probes :) My caps all seem to be intact and the fuse hasn't blown, which is a major PITA because I don't like blindly swapping parts (/waiting for them to arrive one by one). The general assessment online (as you noted) is C3 so I'll go for that and C1 first. Now time to shop for other goodies on Digikey to make the shipping price worthwhile!
Believe it or not I have in front of me a NetGear switch with a dead PSU that is exactly the same at that Dell and the same cap is broken and oozing around the same leg.
Capacitors are the bane of modern electronics. It all has to do with smoothing out power and when they short of go open it's trouble city. The issue is that manufacturers build as cheaply as they can and use low quality capacitors.
I used to repair many makes of switches in the aerospace - defence industry, best to change ALL the capacitors Not just One, because they age with heat & poor design of the power supply, always use high temperature capacitors rated at 105C & look at the capacitor types, Panasonic switching capacitors are very good to use, Look at the ESR Value, you can fit better types always, WATCH OUT FOR HIGH VOLTAGE Large High Voltage Capacitors take time to drain, which depends on the bleed resistor connected in parallel,
