Always look into the electronic recycling dumpster, wonderful playthings can be found... Take everything apart before you throw it away and learn from it!
can u help me bro 😢 I used am4 socket with thinner and no more power on after this.I though some moisture there and blew the socket with dryer.after doing this it power on again and use as long as opening the pc.if I off a sometime,it was nomore power on again.Then I use dryer to blew the cpu socket and it power on again 😢 what do I do bro.
Thinner? ou mean paint thinner? That's bad stuff man! It can dissolve plastics and it may also contain some oil. Very bad. You can try to clean again with Isopropyl alcohol as I show in the video. You should also clean the cpu contacts. Be careful not to bend any pins.
@@PlaywithJunk thanks bro I will try to clean,Now I can use my pc when give a little hot air to cpu socket,I can use as normal without shutting down for a long time 😅
but when I power off for a long time it show cpu led and not power on again 😅 then I use hot air to socket and open normally again.I think some liquid or some oil like bro said still inside the socket.Thanks for ur video bro.I will try to clean again and I will tell my result again.
I'm sorry but we don't sell refurbished batteries for the EVA4400. I made this video to show how it can be done. The problem is shipping of Lithium batteries is always a bit difficult. And I can't give any warranty for the repair. Some work after refurb and some don't.
What an amazing machine. I remember going into data centers and labs with racks and racks of these things running. And boy, did they SCREAM bloody hell. Kilowatts and kilowatts of power just for cooling. These things were engineered with serviceability in mind with the least downtime as possible. Cool stuff!
Yes.... but they are easier to install because you can use existing cables. And some 4K cameras make really good pictures. Of course "realtime" is something you can forget 🙂
Women were the ones who made almost everything then... Core memories, electron tubes, clock faces (radium!) and during the war even heavy metal working.
I remember my only flight on a 4-engine piston aircraft. It was a C-118/DC-6 I think. Eight hours from Florida to Arizona, and I was sitting right in line with the engines. The whole time, the props were going in and out of sync. As you described, it was a constant wah-wah-wah and I could hear the phasing change sounds drifting back and forth from wing to wing like someone was changing the balance knob on a stereo. Totally annoying and tiresome. Didn't experience this on a C-130, so I don't know whether turboprops don't have the same issue, or was it just that particular plane. Don't really miss those "bad old days" of propellers and analog electronics. Good presentation, though. Thank you!
Thanks for sharing that story... 🙂 It's possible that the DC6 didn't have a synchronizer. So it was up to the flight engineer to take care of it. The later L-1649 "Starliners" even had a propeller synchrophaser, which not only controlled the prop RPM but also the position (phase) of the engines relative to each other. This decreased vibration even more. The adjustment had to be done for each airplane individually.
Pro tip. You dont need a soldering iron. I find that it is much faster ans cleaner to just use a lighter to quickly melt the solder and help it fuse evenly with the wire. This especiallt works well with bigger wires
Thanks for that video (and your recommendation). The VAX 4000/705 is 5.6x faster than a VAX 4000/300, which was the first released VAX 4000 (but not the slowest) ;)
@@PlaywithJunk Okay, so it was something like a VAX 4000/400 or above before. Unfortunately, the VAX 4000/300 cannot be upgraded without a change of the backplane :(
@@PlaywithJunk I have to correct that: There are probably different revisions and I have Rev. L01. If I have understood this correctly, I could probably upgrade to NVAX :)
COMPAQ had been a very swanky Company in Computer Business with excellent Products in all Fields. In addition we have to be very grateful for it's engagement to make PC available and usable to the public and PC "Clone" standardisation by defeating IBM's arrogant Big Blue leadership politics.
Yes. And right now HP is destroying all this by acting themself like a "big leader" but people don't take it anymore. HP policy about software/firmware updates is horrible. So bad that they had to move back to normal after court decision. Good luck trying to download the Support Pack for Gen9 servers...
What a swanky Compaq Monster Server. No wonder why Compaq Proliant was leader in Intel based Server realm that era. I got the RA4000 & RA8000 HSG80 FC storage arrays and the SP750 Workstation.
Most of these power supplies turn on by pulling the „on“ pin to ground. Which one that is changes from model to model. It‘s like a PC power supply, green wire. Some P.S. will need a processor talking to them. Those are not suitable for tinkering… Try Google „turn server power supply on“ many hints are in RC forums.
Awesome to see these old workhorses... I sharpened my teeth on the VAX (starting with an 11/750) - but managed a number of them including a bunch of MicroVAX models. Great machines of the time.
The system board to disk tray cable is a bugger, there are also some rather sharp edges which caused many a swear word when I used to be a system manager on these things! Built like tanks though - wish I'd kept my VaxStation 4000/60. Worked on MicroVax 2000 all the way up to 7840's + many many Alpha systems. Loved em! OpenVMS still rules - far better than 'cooler OSes' that are about now & secure too - I should know, still in the IT game :-) The owners should make it far more available now its on x64 - I'd get a copy!
Hi, could you sell / borrow / give the machine to another RU-vidr, NCommander from New Yersey? He works on compiling and running the BSD operating system from source on a VAX machine.
I remember to wok with DEC Rainbow PC‘s which had the same nice and eye comfortable screen and the keyboard wich had a separate numeric pad in opposite of the IBM PC. Fortunately this layout made the throughput up to today. Nice video!
I've programmed all the Vaxen, from MicroVax to 8600 standalone and clusters. I wrote Vax/RDb, C , COBOL, and FORTRAN IV and Vax assembler, all 450 instructions of it. Ultrix and VMS. People must still use them for legacy apps because they go for thousands on Ebay.
The last ones we serviced were on a nuclear power plant. The process of replacing parts there is extremely complicated and bureaucratic. That‘s why they keep everything unchanged as long as possible.
Have you replaced the Dallas clock battery yet? I would have done that first. I guess I would have been wrong also. After that I would have assumed stiction on a drive (same as the other poster below mentions) that age. Glad it was something simple. When replacing a SMD component I prefer to hold it down with an xacto knife or similar instead of using tweezers. With tweezers the part will typically end up hovering over the board by the same amount it was when you pushed it down into the existing solder blobs on the board. When simply holding it down it'll be pushed down flat onto the board once the solder warms up. I knew a guy who used a MicroVAX back in the time of this device. I think it was a MicroVAX 2000. Something smaller than this.
You did it the hard way of plugging the SCSI cable into the mainboard while it was still connected to the drives on the drive tray instead of unplugging the SCSI cable from the drives and plugging the cable by itself into the mainboard without the drive tray in the way.
The initial not working when drives plugged in to power pointed directly at one of the drives having a shorted voltage line and not the power supply. Wy didnt you start with the actual problem in the first place as it was a dead giveaway?
Well…to add some extra drama to the video? 😊 No the reason is that the system worked fine one day before and I let it run over night. Next day it was crashed and I suspected the P.S. because I never saw a disk failing like this. But I had many of these P.S. with bad caps. And bad caps can cause strange phenomena like load depending crashes. So I started with the caps they needed to go anyway after that time…
