ZX Spectrum FROM HELL - CARNAGE - Part 2
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- Опубликовано: 2 авг 2024
- A Sinclair ZX Spectrum 48k saved on its way to the rubbish bin!
Can I repair this poor abused microcomputer?
In this episode, I dig up many problems under the lower ram and find absolute carnage underneath the video encoder chip.
Memory chip tester:
www.ebay.co.uk/itm/1247260207...
Website
www.morefunmakingit.co.uk/
My Twitterings can be found here
/ zzleezz
Discord Channel
/ discord
Ko-fi page
ko-fi.com/morefunmakingit
00:00 Introduction
01:07 Lower Ram removal
06:58 Lower Ram Replacement
09:38 TESTING!
10:04 Video Encoder Chip
14:41 TESTING 2!
15:09 Recap all the faults
16:16 Outro
#zxspectrum #zxspectrum40 #zxspectrumrepair 
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That diagram of all the traces under the lower RAM chips is brilliant. Nice to know I'm not the only one that needs a mud map to find their way around a circuit board. Looking forward to part 3!
I took a picture of the traces and opened it in PS. Then traced over the actual traces on a new layer. It worked really well.
Well, it kinda worked. I missed 2 broken traces altogether!
Your video skills are really getting slick. Enjoying this series loads 👍
Cheers Matt! It's a big learning curve but I'm getting there 😁
Sympathetically coloured bodge wires marks you out as a pro!
Or a lucky amateur 😆
What happened to this poor Spectrum!? Seems the bodges are never ending! Personally I'd have put it out of its misery long before now but glad you're perservering. 👍
I would love to be able to answer that question. Looks like it was used for practice by rabid chimps.
"Your ZX Spectrum has gone to live on a farm, Lee..."
So good of you to try to save it!
It became a matter of principal and pride.
Also, I kept thinking "if I can repair this I can repair anything!"
@@MoreFunMakingIt next step... the Antikythera mechanism!
I had a dog that went to live on a farm, it was many years before I realized what this meant :(
Awww. Sending hugs to 8yo you. Unless it was much more recent and you're actually just gullible :D
@@MoreFunMakingIt about the correct age it was a boxer and a very nice dog, but it was also crazy and couldn't be left alone at all.
I have to say that although I really enjoy repairing things and watching repair videos in general, I really am appreciating your added brand of specially injection humour. Very informative and enjoyable. 😁
As an added side note, I had one of these rubber keyed ZX Spectrums when I was a kid and it went in for repair so many times that I doubt there was much left in the end that was original. I remember a few times going to the local electronics repair shop with my Dad and witnessing the ever increasing nest of multi-coloured wires as the repair tech showed my Dad the latest fixes. Ever since I've always had a very strong impression that breathing on these circuit boards would be enough to make the traces do an impression of a drunk lemming, lol.
Thank you so much! That's a lovely thing to say. For a moment I thought it was going to be a 'but' after the comma! 😂
My boyhood Spectrum only had the one fault in its life. The keyboard membrane gave up eventually after too much Daley Thompson. I biked into town and ordered a new one. Picked it up a week or so later (very vivid memories of that journey) and took it home. It was my very first computer repair. I still remember opening up the case and wondering how I was going to get the membrane out of the keyboard.
@@MoreFunMakingIt Lol, definitely not. Besides, from watching these spectrum from hell repair videos, I'd say you've already had the but, or more precisely the butt, lol. Amazing repair work on such a mangled board. Someone clearly shouted yeehaaa before diving in to try to do the prior err... repairs, lol?
@@MoreFunMakingIt I bet that was quite nerve wrecking at the time, but a good starting point on your repair learning journey. I think that my Speccy completely gave up in the end, but no idea what eventually happened to it. Maybe I'm watching you repair it right now, lol. 🤣
Excellent video and work! I has a similar issue with a Commodore 64. It was so bad, I told the owner ot would be cheaper to get another board. Over 25 different issues. Sometimes a board just can't be saved, sad
There is definitely a point where the amount of work you put into a thing is worth much more than the thing itself. I blew waaaay past that point quite close to the start of the first episode :D But this became a challenge and I can be a stubborn old fart sometimes.
@@MoreFunMakingIt I agree I think sometimes the fun is just the challenge ( If its not commercial ofc). My challenge at the moment as a beginner is actually finding something that is genuinely just not working rather than a dealer etc who has already had a go and failed as I would be starting with no chance if you know what I mean. Looking forward to part 3
Right so.. thanks, I've got an Amiga that I've been putting off fault finding for ages, however using some of your tips has made things a lot easier and I'm on the final leg of my journey so thanks. Now I'm just waiting to finally see where this spectrum ends up :)
I can promise you, this kind of message is the best kind someone making videos can get. If I've helped at all in some way is fantastic to hear! Good luck with the rest of the Amiga work!
Nooo not ANOTHER cliff hanger! Ooo how you tease! Can't wait for the next now :D
3 is the last one I promise 😜
Another great video, thank you!
Thank you for watching it! :D
Nice one! Loved it!
Thank you! 😁
Unbelievable!
Still more to come! 🤣
Just burn it. 😂
It crossed my mind once or twice! Especially in the next stage after I thought I'd fixed everything and it STILL didn't work 🤣
TBH I would've probably given up on that PCB and ordered a brand new repro board by now. Fair play to Lee for being stubborn enough to persevere this far. 😂
You know that feeling you get when you win? And how the tougher the competition the bigger the buzz? THIS!
Also, I'm bloody stubborn :D
His editing skills are becoming too powerful, this man must be stopped
MOAR NODES!
@@MoreFunMakingIt MONKE EDIT
Such a shooodily made cheap PCB!
That might be where they saved a few dollars/pounds?
That was the whole point of the early Sinclair machines. They were built to a very low price point, even using faulty chips in the upper ram to save money.
Looking forward to know how does it ends...
Soon!
7:20 at that point I think i wouldve opted for a Lower Ram Replacement module... would have made things easier. I can see how the ULA ended up getting toasted now...
I won't spoil it for you, but in the end I get to that point too.
@@MoreFunMakingIt Yep, saw that in the end. Sometimes its just not worth making the original chips work... or replacing them if more than 2-3 are faulty
Totally agree. Even if they test ok they're almost certainly about to fail any day
What is the chip tester that youre using? Loving these videos btw
Thank you!
I'll put a link to the ebay listing in the description in a moment.
@@MoreFunMakingIt Got it! Thanks very much
I'm not entirely sure, how you haven't flooded it with IPA and set fire to it tbh. Mind you I have several dead ones to look at and your patience may spur me on
That thought crossed my mind a few times! I also considered setting fire to it might improve it. Can't be worse than the previous soldering!
That thought crossed my mind a few times! I also considered setting fire to it might improve it. Can't be worse than the previous soldering!
wow ,,, that is one sick specie ,,, i thought we had seen the worst in part 1 .. i was wrong
2 more episodes to go! Surely it can't get any worse?! 🤣
@@MoreFunMakingIt WOW just watched the other 2 parts .. epic repair !!! somebody really did a number on that :)
I've never seen anything like it!
Amazed it wasn't just binned.
@@MoreFunMakingIt i have some +2 (grey's) in my to do pile that may provide similar problems .. trouble is my to do pile just gets bigger and bigger .. i just noticed you have some atari 2600 vids i shall be watching them later ..
Better to have a healthy repair pile than nothing to fix. That would be a disaster!
Good luck with the +2's!
To be honest, this is one case where I would've bought a new board and just transplanted the components over. I love originality, but that's gone too far IMO.
Thanks for watching!
;)
Why don't you order a new pcb. Two videos in you could have built 3 spectrum boards by now. I admire the preserving attitude but it's killing me
I'm a stubborn old man!