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<1234567…34>
  • Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…

    Swapped a few upper rams over and i was chasing the faulty chip so gave up fault finding and brought a complete upgrade kit from Retroleum (ty Phil) now I have a fully working 48k Spectrum at last !!!
    povvercrazy povvercrazy April 2017 Hardware
  • Spectrum 128k 2a or not 2b....Just picked up a +2 black case version and I'm in as little bit of a quagmire, The case is definitely black, has '+2A' stamped on the bottom, but in…

    ... /> So as I'm servicing/fault finding I didn't connect all ...
    povvercrazy povvercrazy April 2017 Hardware
  • Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…

    ... help a lot in the fault finding and repair process.
    Mad Fritz Mad Fritz June 2017 Hardware
  • Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …

    ... .

    Yes I was "fault finding" yesterday and if you look ...
    harriusherbartio harriusherbartio July 2017 Hardware
  • ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…

    To aid in fault finding, a test ROM is desirable. ...
    1024MAK 1024MAK July 2017 Hardware
  • Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…

    ... bet than RF/UHF when fault finding, but, if it has not ...
    1024MAK 1024MAK August 2017 Hardware
  • 48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…

    ... " DRAM chips as well while fault finding) power up again and retest ...
    1024MAK 1024MAK October 2017 Hardware
  • help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …

    ... quickest and easiest way of fault finding suspect RAM problems, is to ...
    1024MAK 1024MAK July 2018 Hardware
  • help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …

    ... quickest and easiest way of fault finding suspect RAM problems, is to ...
    redfiat redfiat July 2018 Hardware
  • Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…

    ... which IC is faulty making fault finding a breeze. The Smartcard can ... that would indicate a typical fault with 1 or more lower ... would need a bit more fault finding, my first guess though being ...
    Your Spec-chum Your Spec-chum August 2019 Hardware
  • Was this normal or a bit odd?I just wanted a few thoughts on something that happened a few years back when I had to attend a psychotherapy group. Its probably too far back to mak…

    ... , but was up against petty fault finding at times, wasn't even ...
    dmsmith dmsmith August 2019 Chit chat
  • The Diagnostic PCBIt arrived in the post today so this is my first go with the Diagnostic PCB. (bought on Ebay) This item , I think , does the same job as Retroleu…

    ... with a faulty machine. When fault finding, you want as close to ...
    1024MAK 1024MAK March 2020 Hardware
  • The Diagnostic PCBIt arrived in the post today so this is my first go with the Diagnostic PCB. (bought on Ebay) This item , I think , does the same job as Retroleu…

    ... with a faulty machine. When fault finding, you want as close to ...
    guesser guesser March 2020 Hardware
  • ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …

    ... step one again with the fault finding process...

    If you ...
    1024MAK 1024MAK May 2020 Hardware
  • Speccy 4A board problemHi all. I was hoping for some help with my Speccy (with 4A Board) before I send it off for repair. When I power it on all looks fine (i.e. copyright …

    ... /> It could be a RAM fault, most likely the ‘lower’ RAM ... quickest and easiest method of fault finding, is to use a diagnostic ... happens.

    If the fault is then still present, you ...
    1024MAK 1024MAK September 2020 Hardware
  • 128K refurb.... What is the best way?Here's the latest Spectrum I got... Finally got a Toastrack... Not sure if it was good value ( around US$100 ). [img]https://os.blackice.com.au/us…

    ... up the 128k and started fault finding. No clock on the z80 ...
    cj7hawk cj7hawk March 2021 Hardware
  • How to apart a 16K from a 48K?How can I understand that if i have a 16K or 48K? Thanks

    ... ’ / extension RAM is handy for fault finding when a machine won’t ...
    1024MAK 1024MAK April 2021 Sinclair Miscellaneous
  • Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…

    ... know how it helps with fault finding these.

    [b][i ...
    1024MAK 1024MAK January 2022 Hardware
  • Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …

    ... tricky to diagnose upper RAM fault, so I thought I' ... . This usually indicates a fault with the upper RAM or ... this RAM test was regularly finding a problem at the ... was unable to find any fault by testing from BASIC.< ... I couldn't reveal the fault from BASIC. I can ...
    Zorn Zorn April 2012 Hardware
  • Microdrive fault.I guess some of you may know this... My microdrive has a problem: the motor starts running as soon as I plug the computer in, and won't stop! It is …

    ... is not the interface's fault, as it behaves the same ...
    Alessandro Tommasi Alessandro Tommasi April 2001 Sinclair Miscellaneous
  • Spectrum +3 fault - flashing screen on power onHi ive just bought a +3 When I power it on the power led and disk drive led come on. The screen just flashes black and white around the border, almos…

    ... ideas as to what the fault is?

    ta ...
    mlasham mlasham December 2002 Sinclair Miscellaneous
  • Finding the length of loaded Bytes:Is there a way from BASIC of finding out how big a block of bytes loaded from tape was? i.e. - if you do LOAD""CODE and load in a lump of bytes, ca…

    ... a way from BASIC of finding out how big a block ...
    trellis trellis May 2003 Sinclair Basic
  • Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…

    We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working one, and we got the same result.

    is this a ram fault? How can we check ram chips?
    Arda Arda December 2006 Hardware
  • What I hate about computers and/or video gamingYesterday I spent approximately four months (subjecively that is, objectively it was around two to three hours) fixing my mate's PC. I won't bore you…

    ... a friend's PC, and finding x amount of malware on ... the third party program at fault, but WinXP is supposed to ...
    ewgf ewgf August 2007 Chit chat
  • Need help finding Spectrums in London - visiting in NovemberHi there, I need some help from all of the english members of this forum, or more specifically anyone located in the London area. Late last year, e…

    ... what the chances are of finding a ZX Spectrum in one ...
    8bitten 8bitten August 2007 Sinclair Miscellaneous
  • Hardware fault - HELP!I bought a speccy 48K (rubber) on Ebay. I was delighted when it arrived. It was in PRISTINE condition, it looks brand new! However, the machine has a…

    ... ! However, the machine has a fault. The seller has no idea ... that the machine has a fault, so I'm reluctant to ... condition...

    So, the fault? Well, SOME of the keys ... conclude the hardware is at fault. A couple of questions:
    Mark Wills Mark Wills February 2008 Hardware
  • Spectrum 48k Fault - anybody seen this before?Hello, I have two 48k spectrums that exhibit the same fault. Black border, paper area is full of columns of wavey lines. I have posted a screen sho…

    ... spectrums that exhibit the same fault. Black border, paper area is ... anybody seen this kind of fault before that could let me ...
    zx2628 zx2628 November 2009 Hardware
  • Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…

    ... if the memory is at fault, and which chip?

    JohnH JohnH November 2009 Hardware
  • Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…

    ... can help me with a fault that has just developed on ...
    pasty72 pasty72 December 2010 Hardware
  • Possible design fault in +2A/+3 power pack. Fix?It's the second time a +3 power pack ceases to work when I make a short while using the scope to diagnose a +2A/+3 computer. And it's the second tim…

    ... , and... why the 2N2222 became fault. So I peeked at the ...
    mcleod_ideafix mcleod_ideafix February 2011 Hardware
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