Re: Restoring rusty components - without using paint?
Posted on 2023-01-06, 10:49
I tried the zinc spray and it seems promising. Not the plain finish I'd like but it seems to be conductive. I think it's good for internal parts.
Re: Restoring rusty components - without using paint?
Posted on 2023-01-04, 14:38
One some old Macintosh metalwork I had GREAT success with citric acid - not from lemon juice, I have a can from ebay to clean my kettle! The rust disappeared but the yellow coating disappeared too. I have some paint coming but I think that for those internal parts keeping the bare metal would be …
Re: Restoring rusty components - without using paint?
Posted on 2023-01-04, 11:56
Zinc spray: very interesting! I cannot figure out what the finishing is going to be and whether it lays a non-conductive layer but I guess I could give it a go. It seems to be the best solution for those internal parts. Electro plating is for sure the best solution but as you say, messy and large …
Restoring rusty components - without using paint?
Posted on 2023-01-04, 10:01
Hi all, I have some old computers to restore and some are a bit rusty. I know the plan: citric acid to remove the rust, then some elbow grease and a layer of paint. However, paint will make the surface non conductive. I was wondering if there was an alternative, at least for the metal parts which …
Links to YouTube videos
Posted on 2022-12-30, 13:37
Hi there, I have a question for the admins and the whole community. I am a small youtuber and this forum has been very helpful over time with my projects. I usually make repair videos and I have linked them here before. However, my channel has now grown a bit and get paid (very little so far) for …
Re: Let's fix some PS/2 floppy drives!
Posted on 2022-12-30, 11:56
On this subject, while I try to fix the PS/2 drive, I'd like to build an adaptor for a standard 1.44MB unit. The read-made PCBs from TexElec would be great but they charge an arm and a leg in shipping so I found the below https://github.com/schlae/PS2FloppyAdapter and I thought I could order some to …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-16, 20:33
Thanks! I cannot wait to hear that familiar squeaky noise of that stepper motor! 😀 Finger crossed I can revive it!
Re: Let's fix some PS/2 floppy drives!
Posted on 2022-12-16, 20:32
ah, then the SIMMs are not working at all! I will be looking into the PS2 in some time but I guess I will remove the SIMMs and test. If the memory error goes away then I can test the drives. I wasn't aware that 128K lived on the board and thought that only a fraction of the SIMMs were being …
Re: Let's fix some PS/2 floppy drives!
Posted on 2022-12-16, 20:12
The guy in the video says "the difference is that the floppy drive seeks in this machine" making me assuming that the seeking noise happens every time he boots? Now, before digging into the floppy, I need to fix a memory issue with this computer. It only sees 128K and shows a memory error. Chances …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-16, 20:02
Apologies for not showing you the full sequence. After trying two times (after I lift the microphone), the drive gives up, the system gives error 1701 and the drive starts blinking 4 times - pause - 4 times - pause forever. When I unintentionally unplugged the speed sensor the blinking was three …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-16, 18:35
I am very familiar with that intro of course! I am not sure my stepper motor has an accessible spindle though - I'll disassemble and take pictures. I did not try to move the stepper - my observation is only based on the noise I hear - that is, I don't hear much movement. It could be that the stepper …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-16, 17:45
Back to the HDD, THIS might have something to do with the fault. It's the ribbon cable going to the heads I reckon. It's all corroded. I am not sure that that's the issue though as it feels to me that the head stepper motor is stuck - or the heads are stuck. But this cannot be good! :) IMG_2681.JPG …
Re: Easiest way to create 720KB Floppy - Windows
Posted on 2022-12-16, 11:55
The BIOS lists 720KB as available choice so it should work. Under MSDOS (6.22) if I just format the disk it tries at 1.44MB and fails. I have to manually select 720K via the /F:720 option. Then it seems to be working as I can boot from that disk and it runs MSDOS. I'll try later if Windows 10 likes …
Re: Easiest way to create 720KB Floppy - Windows
Posted on 2022-12-16, 10:22
Shall try and let you know!
Re: Easiest way to create 720KB Floppy - Windows
Posted on 2022-12-16, 09:59
How do I find out if the BIOS has 720K support? A safe way is if it allows you to define the drive as a 720KB one. But you didn't say what motherboard/platform you are using, if it's not that old it won't give you the option (Still the drive defined as 1.44MB in BIOS should be able to write DD …
Re: Let's fix some PS/2 floppy drives!
Posted on 2022-12-16, 09:47
I've been pointed here as I also have a PS2 with dead HDD and dead Floppy! Mine is the same model of the OP. The behaviour is that the motor spins (I will check the speed soon) the head seems to be kind of stuck. Let me explain. The head makes a very small movement when I power up but then nothing. …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-16, 09:24
@mkarcher Amazing! I'll continue there then! Thank you!
Re: Easiest way to create 720KB Floppy - Windows
Posted on 2022-12-16, 09:18
Probably that is the issue - the moment I cover the hole, if I try to access the drive Explorer crashes and WinImage briefly opens up the "writing disk" dialog which then closes immediately with no errors. I didn't realise I needed BIOS support for 720k. Meanwhile I think I've managed to use command …
Re: IBM PS/2 model 30 8086
Posted on 2022-12-15, 21:24
eheh - no it doesn't! :) Discovered after my previous post. Well - I am not 100% sure I am writing the disk right - as you say it's 720K so took me a while to hopefully write a correct copy of DOS 3.3 - but it does not read. The disk spins, the head barely moves. I moved the head manually a bit (to …
Easiest way to create 720KB Floppy - Windows
Posted on 2022-12-15, 19:35
Hi all, I need to create some 720KB floppy for a PS/2 system. I fished out an old MB with FDD support, plugged an actual Floppy Drive and attempted to use WinImage. It only works with the little window on the disk left open - if I cover it to simulate a 720KB disk, Windows just refuses to read the …
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