Hi just a dumpster-diving follow up this: Dell Optiplex 990 which I found in the dumpster it was Dells top-of-the-line Office 900 series you know Slimline PC Intel Core I7 in here and I had a quick look in a previous video where I scored - which is the other one was a HP one which had an I5 something-or-other in it with like a past mark of like 7000 or something like that I'm currently actually using that I put upgraded a graphics card in it and currently using that as my main lab capture video capture PC here. So I thought I'd have a look at this one and one thing I didn't take a look at last time was the actual processor inside this thing. It turns out it's actually an I7 I won't show you that if you can't read that. sorry but it's an I7 2618 of like 9000 or something.

It's like Oh 8000 sorry 8200 or something. It's pretty darn good. and I've also got this motherboard up here as well which has the exact same socket 2011 I7 2600 Akkar sigh Case here: look at all. The drive bay is fantastic, but unfortunately I think there's something wrong with that motherboard because it doesn't seem to power up.

I've tried different power supplies and everything and the power supplies hiccup. so I think it might have some sort of remove the CPU removed everything I I think there's some sort of issue with that anyway. I thought we don't just take a look at that I well this one I have opened up the power supply so let's take a squiz at that. So the symptom with this PC is that it just simply wouldn't switch on.

So of course you instantly are suspect the power supply. This is actually a Delta Power supply. You can see that in there and you know top quality. Power Supply works.

Looks really well designed and manufactured. Look at all the gunk in there for the stuff and there's a fuse down in there. There it is and I have scraped away its off heat shrink which is fantastic. So I couldn't actually probe it unless I took the ball.

That's a bit much so I just scraped away access to the top and bottom terminals there and we can get in there and measure that cuz that's well, the first port of call really. But yeah, I'd like this supply. Looks well designed, well manufactured, but you'd expect that into the top-of-the-line Dell office PC Okay, it's going there and Tada that is. Yep, it's blowing.

There you go. But why is it so I mean is it was it just some sort of power on surge or something like that that caused you know, fatigue in the fuse caused an issue like that? That's possible. Or is there some you know, major fault somewhere that blew the fuse? Only one way to find out. Replace it Tara back up the blows again, you know there's something else.

Wow, this is actually quite difficult to get out. You know, some sponge under there your that don't sound like it's not really insulation. so I'm not sure what the deal is there, but anyway, look at all this. it's just just like this was all wired in place after the fact.

I Don't think that's a connector in the other thing that's hardwired in, so that's a real pain in the ass to service. Jeez, Looky, what we have here. Yeah, that looks like it's had this not blown out of it. Uh-huh.

Well, there's your problem. Wow Two capacitors there and they like high-voltage ones. I Don't know, but they have. They've really gone to town.

no wonder the fuse blew. so maybe I've done videos on this before. Ceramic capacitors can fail short and cause a real problem. but I'm gonna get like clean that out, sort of scrape it out and suck those off.

Nothing like sucking off a dead capacitor. There we go. Got them out that doesn't look pretty? Does it? Is there a trace running? If there's a trace running under between? Ah, that's interesting. Anyway, I'm pretty sure that these suckers have overheated and melted somewhat.

It's likely shorted out. Of course, the power delivers in there. They heat up and it's melted some of that foam underneath. I'm not a big fan of that foam now.

We don't directly know what the voltage of these caps. Ah, but we can have a look at the placement here and you can see this trace going off here They've got a like a star grounding point here going off. There's actually it looks like two of those going off those star grounding points to elsewhere way up in the circuit. and this one here.

Look at this. it looks like it's directly connected there. bit hard to see on my camcorder screen. I'll confirm that by buzzing it out, but that looks like it's directly across a big filter cap on the top.

Aha, is that the main DC filter cap? If so, that would explain why we blew the snot out of the 1206 ceramic capacitor there because it would have been like a high voltage like four hundred volt cap and any direct fire in that BAM is directly across that railway. It's going to take out the fuse. Definitely. So yeah, and sure enough, yep, it's the main filter cap there.

And yes, it's a 150 Mike 420 volt job. So there you go. They would have been high voltage ceramic caps I don't have in my jump in I Don't have such high voltage 1206 ceramic caps, but because it's basically just some you know, higher frequency, lower impedance stuff across the main filter cap there. We can simply leave that out and it should still work.

And as for the one next to it, well, for the money that goes up to there, what's that between there and there? Perhaps? No. you're probably screaming at me because you're watching in Hi-def and I'm watching in on the camcorder screen. No, these two caps are in parallel and that's actually not connected to the main filter cap there. It's actually connected to there.

So I need to follow the money and see where that goes. Deep throat time. Follow the money. Okay, so it looks like that bug is off under the huts, not down in there.

Buggers off to that I see there that pin over there? So I look I don't know. I'm not going to pull out a try and reverse engineer to pull out a typical worst schematic or whatnot. So yeah. oh, just choose if you know the highest voltage cap.

I've got to hand and whack it in there. and thanks to AVX who are set in this kid among many others, I've covered these in a previous mail bag with the UH flexible termination on these things. Automotive-grade Fantastic. Um, let's just go for a 10 Nano Farad 200 volt Oh 805 to hundreds of those back on and she'll be right.

Yeah, hopefully. actually. I Suspect that only one of these may have failed because I'm the other one. Well, one of them.

their measures are 33 in there. It is that one is still good. So yeah, I suspect that Well, our 10 ends probably. that's all I've got in that are high voltages.

Want to use as high a voltage r1 as possible? but I think yeah, we've only got the one failure there and the other one next to it is. It's pretty much fine and dandy. That's just a recap of the soft termination system there that prevents PCB warping from cracking the ceramic cup. There it is.

Check it out. It's a proper ceramic job. six point three amps. So yeah, we might be able to get those end caps off and actually stick it back in reuse those.

Can we? Hmm Wow Check it out. My jumpin came through I Just so happen to have exactly a six point three app. I'm dis ceramic hoc fuse beautiful and better yet, those end caps come off fantastic. I'll stick them back on I Can solder this sucker back in.

can even put some heat shrink on it. Check it out like a bought one. Alright, there's only one way to find out this is any good. Let's plug it in.

There's no power switch on this one. There's a green LED on the back. There's some sort of reset overload. see if it go bang What? No green light? Oh What? What? What? Mwah no.

I Don't think it's actually worth pursuing that power supply troubleshooting any further in terms of you know and effort for value output. but I'm curious to know if this motherboard actually works. So I think I might just work on next earn or power supply on to it. We can just lift that out, slide out that access the power.

of course it's got its. It's basically a standard sized motherboard so we can. If the motherboard works, we might be able to transplant it into a different case. but the dull ones.

if you want to get the exact deal replacement power supply. it's pretty expensive. like 70 80 bucks or something. I'm not going to spend that on this machine, but I can either transfer the motherboard out if it works into another case which I've got which supports the same size motherboard or potentially maybe you know, hacking a some other sort of slim line power supply into there.

but it won't like go into the nice because it's got like a nice clip a railing system here that you push down on that and it slides out and all that sort of jazz. You know if we can just stick it in there or something, tie it down how you doing? oh it's not, she'll be right. So I've got this other dumpster PC it's a Compaq Presario it's an I-5 Something is not very powerful at all and let's pair it up. a CPU Fans coming on.

By the way, it only it was missing the two pins down the bottom down there on the power connector if you can see that. but no it's it's pairing up well the fans coming on. It's good sign. Power supply is not hiccup in alright, let's give it a ball.

Oh I See something flicker? Do Ah, there you go. Motherboard works fine F12 thing. There we go. we're in like Flynn There is it.

Ah, we got eight gig of ram. no walk-ins and there it is. the I7 2603 point 4 gig. Sweet ass.

Well I Don't really want to transplant the motherboard out of this into the Compaq Presario case. I Really don't like that case. It's like the tower cases of dam so over them. I Really like these are slimline ones here, especially for in in the lab you know.

slide them under the bench. you can put like trays and stuff slide them under. Really, they do work quite nice actually. I Had another look on ebay and it turns out that all the cheap ones actually have the cable coming out the side.

here. they have the fan on the end and the cable. like coming out here somewhere and it's only like a really short power supply cable. So it's even though they advertise it as compatible with the Optiplex 990, which is what this one is.

but this one needs this massive long power cable coming all the way over here. Not to mention the super long extra 12-volt one going over here as well. And yeah, so unfortunately this one seems to be a fair bit rarer and more expensive. Aha I Remembered I might actually have an old Dil down in the bunker so I took a trip down, dug through the dumpster.

PC Archives Sure enough, we've got this. Dell Studio I don't know something or other. whatever it is. Anyway, it's an Intel Core 2 Duo Fantastic.

It's an E 7400 so you know. Not exactly great, but check out inside that looks very similar. Power supply not identical. It's the cables not quite as long here.

it just goes down into there, but maybe that will reach and that'll fit. We can budget in. Hmmm. let's give it a go.

Studio Slim 540's For those playing along at home, check it out. There near-identical The only major difference is the one that came out actually has the cable coming out the bottom here and there we go there it is again, the D 250 something or other and this is the one we've got inside the older Slim one and well, it's even got the like the correct indents I should just clip in. Beauty. Let's give it a go.

ha. It clips in. it's not as solid as the other one, but put the screws in the back. she'll be right.

No worries that won't be able to snake right around there like it did last time. but no workers I can take that over the top there. she'll be right now. No worries whatsoever.

Yeah, that's a Bobby does. Love that and power cable reaches. That is a winner. Winner chicken dinner, huh? Even the three screw holes line up.

Sometimes you win. Beautiful. All right. Here she goes.

Yeah, Come on. Beautiful. There you go. We have a working Core I7 2600 mAh Sheen in a nice Optiplex 990 case.

of course I'm going to have to get a GT 1030 yo graphics card for it, one of those slim, low-profile things, but that and this fan is pretty silent on that power supply and that as well. so that's fantastic by the way. I'm not sure if I ever updated you on this previous one that I found in the dumpster. it's a core I7 3 double 7 OS it's actually I believe it's the most powerful one I've ever are found in the dumpster.

slightly better than the I-5 I'm currently running as my lab a PC I think it's a pass mark of like 8800 or 9000 or or something like that. There we go for those playing along at home and it works. a treat. It had like a fan issues but I reset the bias and did all sorts of stuff and it is a very very nice machine.

and it's some and the fans go like they a bit noisy when they start up for 10 seconds but then they shut down ten things near silent a three double seven 0s. So I now have three working dumpster Slimline machines one and I-5 which I'm using as the lab PC and all of them are like over 8000 pass mark and a three double seven zero. What people are throwing out and as it so happens, it was real handy to keep that old core2duo del machine as well I cut the perfect power supply out of it. Unbelievable.

Sometimes you just win like if you bought that I could sell these on eBay for I don't know, probably 250 $300 each Australian something like that and they just toss about. but wait, that's not all I didn't want to do this as a separate video. it wasn't really worthy. but let's check out this.

Oh Ben Q or monitor. It's a Geo 2450. It's a 24 inch full HD monitor with all the bells that you know one those are new fangled LED Backlight once. Umm, what a score to go along with the things and it seems to be working just fine.

If only it looks a bit fuzzy at the moment. I'm using VGA output at the moment, but it looks to be in pretty good. Nick's a bit dusty but still got the sticker on the back. Beautiful! So there's some pretty amazing finds from the dumpster.

In recent times, three working I7 machines are monitors. This is not that. I don't think I got another monitor fairly recently I like some of them a crap but occasionally you get like decent ones like a 24 inch LED backlight one like this model here. Unbelievable.

And for those who always ask, yes I Do find this stuff in the dumpster. It is a corporate office complex. You have to be an own. It serves several big corporate office buildings here.

There's dozens and dozens of high tech companies here and they just throw out. you know, office pcs like this or a dime-a-dozen to them and monitors when they upgrade and other sorts of stuff. and they just toss them out. Usually almost always are working in some sort of condition.

So yeah, it's fantastic. Um, so yes, this is not a public access dumpster. it's specifically for the use of the companies in this corporate. Business Park and sorry if are these jeans are better than the one that you're using now cuz I know there's a lot of people who are absolutely amazed by this thing.

They go I wish I could have a three double 700 you know, with a eight or nine thousand pass mark or something like that. and yeah, sorry. it's just the culture we live it. They throw this stuff away.

Unbelievable. Anyway, if you liked it, please give it a big thumbs up. And as always discussed down below, catch you next time.