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<1234567…34>
  • 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
  • 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
  • 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
  • Faulty 128 toastrackHello, I hope someone of the hardware gurus can point me in the right direction for fault finding. My speccy crashes often (sometimes after a short,…

    ... in the right direction for fault finding.
    My speccy crashes ... screen completely filled with thoose dots and blocks.
    Switching power ... /> Any hints for shortening the fault finding and repair procedure will ...
    Mad Fritz Mad Fritz June 2009 Hardware
  • Repair options for my own dear old Spectrum 48k?Hello all, This is my first post to this wonderful forum, which is part of a truly great website! My name is Arnold, and I live in Utrecht, The Nethe…

    ... anymore. It?s my own fault. Somewhere in the early nineties ... a mosaic of coloured flashing dots and blocks. The spectrum got ...
    ZXHistory ZXHistory October 2009 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
  • 48k dots appear but not with CUB monitorToday I tried out an issue 3 and an Issue 2 with the CUB monitor, to my surprise they both worked flawlessly, now before when I tried them on any oth…

    ... other display i would get dots and lines appearing on the ...
    Macc Macc May 2011 Hardware
  • Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…

    ... the car boot has a fault. When you boot it, it ... any reason to be at fault there), and the lines went ...
    Muzer Muzer June 2011 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'd ... Spectrum. This usually indicates a fault with the upper RAM or ... was unable to find any fault by testing from BASIC.
    fault from BASIC. I can only ...
    Zorn Zorn April 2012 Hardware
  • ZX81 with black screen and some white dots.Was gearing up to do a composite video mod on my ZX81, and today was going to be it. Unfortunate when started my ZX81 seems faulty. I get a back scre…

    ... back screen with a couple dots where I assume the K ...
    pmsr pmsr July 2012 Hardware
  • Interesting Keyboard FaultWhy-oh-why do I keep buying half-dead Speccys off fleabay. Bought this one as a source of spares, it was listed as having a non-working keyboard due…

    ... due to a possible ULA fault, I had a correct (but ...
    napoleonblownaparte napoleonblownaparte August 2012 Hardware
  • Susan Kare 5 Dots Font...Hi Folks, Thought I would have a go at creating a version of Susan Kare's "5 Dots" font for the Spectrum. Susan's example on her web site gives the…

    ... of Susan Kare's "5 Dots" font for the Spectrum. Susan ...
    Paddy Coleman Paddy Coleman July 2014 Development
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    ... to look to resolve the fault with my issue two board ... anything similar sounding? Perhaps a fault on the LM1889N?

    Wiggs Wiggs September 2014 Hardware
  • Newbie with a faultHi all just joined after digging my spectrum out of the loft after 30 years, it was put up there because it had a common fault I remember from back i…

    ... because it had a common fault I remember from back in ... sure this is a common fault.
    Many thanks. btw its ...
    Boogie-time Boogie-time January 2015 Hardware
  • Guess the video faultI've two dead flesh Spectrums, one a 16K issue 2 outputting white with a tinge of blue (not as extreme as photo shows) with two pink horizontal lines…

    ... wrong? Is either a caps fault?

    16k:
    [IMG ...
    brownb2 brownb2 January 2015 Hardware
  • Toastrack fault - anyone recognize it?Hi I took a chance on a toastrack on eBay lately although it had a fault. The problem can be seen on the linked picture below. The problem sta…

    ... lately although it had a fault. The problem can be seen ...
    Kjaerhus Kjaerhus August 2015 Hardware
  • help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…

    ... some diagnosis.

    the fault occurred about 13years ago whilst ... the upper memory but the fault is still there.

    fault? or is my rom scrambled ...
    cypher007 cypher007 December 2016 Hardware
  • ZX Spectrum +3 keyboard faultHi all I've powered on my zx spectrum +3 for the first time in a couple of years. It seems to have developed a fault with the cursor keys. I can'…

    ... seems to have developed a fault with the cursor keys. I ...
    schneil schneil July 2020 Hardware
  • Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…

    ... i've noticed some black dots on the white paper that ... .
    This is the fourth fault i'm trying to repair ...
    gtsamour gtsamour January 2007 Hardware
  • Interface rom - Need help to dump itHi, I have temporarily an interface that is similar to a multiface. It has an NMI button and displays a menu where states can be saved and pokes ent…

    ... some kind of thermal related fault. Last night, i quickly replaced ... if i could track the fault but it still didn't ... , although having a few black dots appearing randomly after the sinclair ... temperature. (Or something caused a fault in a way that a ...
    odious odious October 2007 Hardware
  • ** Two Forthcoming Cronosoft Releases **Here's a couple of taster screenshots of forthcoming releases, coming very soon: SHOOT-EM-UP DESIGNER [url]http://i21.photobucket.com/albums/b253/c…

    See, it's Simon fault! But I agree, early '80s ... to just go for the dots, or risk the multipliers + letters ...
    bobs bobs February 2008 Games
  • Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…

    ... . It seems to be the fault of one of my add ... , and I thought that the fault maybe related to that. I ... screen and 8 groups of dots appear in squares , 4 at ...
    Alien 8 Alien 8 August 2010 Hardware
  • Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…

    ... unable to find where the fault is.

    Currently when ... black paper with random green dots.

    I have tested ...
    Johan1973 Johan1973 July 2012 Hardware
  • Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…

    ... 4116 chips around, but the fault appears in the same place ... (>1min), a few extra dots appear two columns to the ... /> One other thing with this fault is that if you look ... .

    2. The second fault has only happened a few ...
    Trafferth Trafferth July 2013 Hardware
  • Anyone managed to get a Spectrum emulator working on an Ouya?After messing around with a Raspberry Pi for a while, I gave up and bought an Ouya specifically as an emulation machine. It works great for almost a…

    ... was partly the Shield's fault, and partly sloppy programming.
    dots button?

    [quote]This is not really a fault ...
    djdron djdron August 2014 Emulators
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... on, I had a few dots and lines down the left ... RAM IC with an intermittent fault or something else occasionally interfering ...
    Zorn Zorn December 2014 Hardware
<1234567…34>

Latest Posts

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  • Microdrive fault.I guess some of you may know this...<br /> <br /> My microdrive has a problem: the motor starts running as soon as I plug the computer in, and won't …
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