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<1…13141516171819…34>
  • Weird output...Last week I found my old ZX Spectrum 48k and I tried to connect it to my tv... After tuning it (at 583MHz - C35, it's the only one with signal) it s…

    ... has problems.

    Either fault could have caused the other ... indicate that the CPU and ROM are working, and that the ...
    balford balford April 2014 Hardware
  • 48k black paper white borderI recently sold a speccy to a guy, unfortunately the power supply didnt survive the trip, so on replacing for him it seems neither did the speccy! H…

    Possible poor connection on ROM socket (also check any other ... likely to be a RAM fault.

    As it appears ... Z80 is getting through the ROM start-up code to set ...
    1024MAK 1024MAK April 2014 Hardware
  • ROM cartridgesStarting tonight 19:30. [url]http://www.ebay.co.uk/sch/bytedelight/m.html?_ipg=50&_sop=12&_rdc=1[/url] More to follow!

    ... an offer for the test rom??[/QUOTE]

    For collection ... the comprehensive diag ROM cartridge, which is great for fault diagnosis (I ...
    bverstee bverstee May 2014 Sales
  • ROM cartridgesStarting tonight 19:30. [url]http://www.ebay.co.uk/sch/bytedelight/m.html?_ipg=50&_sop=12&_rdc=1[/url] More to follow!

    ... the comprehensive diag ROM cartridge, which is great for fault diagnosis (I ... the original Sinclair black test rom

    [url]http://www ...
    ANDREW RYALS ANDREW RYALS May 2014 Sales
  • Spectrum Plus display issueHi, does anyone know if this is fixable at all by someone with no experience? From looking on a similar post on World of Spectrum forum they mention…

    ... />
    - Faulty CPU
    - Faulty ROM
    - Faulty ULA
    - Faulty ... .
    - Other fault interfering with communications between CPU/ROM/ULA.

    Zorn Zorn May 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... the RAM still had a fault, I would expect the Spectrum ... RAM test. Alternatively use a ROM test cartridge that has a ...
    1024MAK 1024MAK July 2014 Hardware
  • Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…

    ... the RAM still had a fault, I would expect the Spectrum ... RAM test. Alternatively use a ROM test cartridge that has a ...
    Brian Brian July 2014 Hardware
  • Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…

    ... the CPU or ULA or ROM (very rare) or something interfering ... upper RAM (a lower RAM fault can also do this, but ...
    Zorn Zorn August 2014 Hardware
  • Interfaces & ROMsHi everyone, I'm currently looking into the various modern interfaces for the Spectrum to allow me to run all my games from an SD card. I have a few…

    ... other than a simple keyboard fault) prevents it from receiving instructions ... ROMs (like the SPECTRUM ROM TESTER) actually have to ... other interfaces that include a ROM cartridge slot (Sinclair Interface ... the BASIC ROM and switch in another ROM or ROM image in ...
    Tekno Venus Tekno Venus September 2014 Hardware
  • 48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…

    ... /Interface2/Cartridges/Interface2_RC_TestCartridges.htm"]ROM cartridge which contains a ... other interfaces that include a ROM cartridge slot (RAM Turbo ... Paul can supply a suitable ROM cartridge.[/URL]
    Next, ... operate, so if the fault is a failure of the ...
    1024MAK 1024MAK September 2014 Hardware
  • Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…

    ... faulty Spectrum+ had the same ROM checksum 7758 that was not ... ://www.livewiredesign.co.uk/TestSpec4-fault.png[/IMG]

    Picture ...
    Korinel Korinel November 2014 Hardware
  • Issue 2 Spectrum - Black screenHi I have an issue 2 spectrum which I'm having some issues with. I bought it on ebay so have no idea of the history or how it came to be broken. Whe…

    ... had access to a diagnostic ROM / board / cartridge. Would quickly establish ... "smells" like a "lower" RAM fault.

    Which chips are ...
    1024MAK 1024MAK November 2014 Hardware
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... you can burn my test ROM (it's on here ... ).

    Put the ROM in, press the button, and ... which will tell you the fault - probably.

    If ... fault. You can check this with a Multiface with a normal ROM ... unlikely to be a ULA fault. If your -5V is ...
    Spirantho Spirantho January 2015 Hardware
  • RobikHello to all, Is anyone experienced on this russian clone? I have one at hand with corrupted screen (but it boots and replies to keyboard inputs so …

    ... : check the voltages, RAM, Z80, ROM.

    There's a ... could be the Z80 at fault. Take this with a pinch ... my experience most times the fault is really the RAM, and ...
    pkersey pkersey January 2015 Hardware
  • Resurrection of ZX SpectrumHello everyone. I recently emerged from my attic bearing my childrens 128k ZX Spectrum +2 with a bag of games etc. Like many before it hasn't seen…

    ... a RAM chip fault, a ROM chip fault or a Z80 ... CPU fault.

    But ... been built-up by the ROM programmer(s) using the ... stage of fault finding is to swap the ROM chips between ... If the fault does not move with the ROM chips, they ...
    1024MAK 1024MAK January 2015 Sinclair Miscellaneous
  • Resurrection of ZX SpectrumHello everyone. I recently emerged from my attic bearing my childrens 128k ZX Spectrum +2 with a bag of games etc. Like many before it hasn't seen…

    ... see the CPU being at fault here as the machine *almost ... an emulator if I disabled ROM write protection and started writing ... randomly to the ROM :)

    They should be ... check. If you have a ROM from a toastrack or grey ...
    balford balford January 2015 Sinclair Miscellaneous
  • +3e simple ide interfaceHi guys, I want to make a +3e with my +2a. I'm thinking of making the simple 8bit ide interface (internal) and connecting it to a 40 pin ide to sd r…

    ... /> And theres already a +3e rom for it. I've done ... than hardware. But the one fault is that the following games ...
    Zetr0 Zetr0 January 2015 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…

    ... it is, but occasionally a ROM failure can cause it too ... need one, really - diagnosing the fault will be much harder without ...
    Spirantho Spirantho January 2015 Hardware
  • DivMMC Enjoy! Works on 3 of 4 48k Speccy's I own?Hey guys. I have a DivMMC Enjoy! Which is absolutely awesome! Love it to bits. It works perfect on three of my 48k Speccy's, but something isn't rig…

    ... of certain parts of the ROM firmware.

    It seems ... clones) were manufactured with this fault and it went unnoticed in ...
    Zorn Zorn January 2015 Hardware
  • DivMMC Enjoy! Works on 3 of 4 48k Speccy's I own?Hey guys. I have a DivMMC Enjoy! Which is absolutely awesome! Love it to bits. It works perfect on three of my 48k Speccy's, but something isn't rig…

    ... of certain parts of the ROM firmware.

    It seems ... clones) were manufactured with this fault and it went unnoticed in ...
    RSwipeCA RSwipeCA January 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    ... />
    From your symptoms, the fault appears to just be limited ... the ULA, the RAM, the ROM are all working okay.
    1024MAK 1024MAK February 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    General Z80 fault finding:-
    Check the supply ... or /CE pins on the ROM chip.

    Mark
    1024MAK 1024MAK May 2015 Hardware
  • External Z80 CPUHi Looking for some advice if possible. Many years ago I had a plug-in board for a Spectrum 48k which had a couple of switches, a z80 CPU, and a S…

    ... (except maybe during a fatal fault condition).

    On the ... . Program the normal ZX Spectrum ROM in one half followed by ... a test ROM in the other half. Each ... ROM image must be exactly 16384 ...
    1024MAK 1024MAK August 2015 Hardware
  • Dead SpectrumHello guys, I've just bought a dead Speccy 48k (Rubber Keyboard Issue 3 board). Basically, when powered on it initially appears to boot up ok, but in…

    ... s slightly more probable the fault is in the upper ... could well have an addressing fault that'll prevent proper initialisation ... .

    If the fault is in upper RAM, depending ... from an external (or replacement) ROM. In this case I usually ...
    Zorn Zorn August 2015 Hardware
  • Destroyed my ROM. Need a new one...I was messing around with my 48K rubberkey's ROM trying to read its contents with the programmer we have at work but in my haste and excitement I mad…

    ... and the pin of the ROM - nothing! No continuity! ... worked. Now I have a fault-free Spectrum.

    ROM?! So I replaced it ... I didn't destroy my ROM! Just soldered in a ... you rather have your Hitachi ROM returned? I don't ...
    namtip namtip August 2015 Hardware
  • Game development guidesHello all, I want to get into game development for the ZX Spectrum and would like to know where I can find some helpful guides. I've looked around t…

    ... SP is pointing to the ROM, it won't be able ... NMI won't be z88dk fault!
    Einar Saukas Einar Saukas September 2015 Development
  • z80 assembly helpEver since I was a child I wanted to program my zx81 then my zx spectrum + 2. However, it was such a mystical beast and I only ever used BASIC not kn…

    ... that it's not your fault in this case). All further ... . passed to PRINT_OUT in the ROM) as the row & column ... at the start of the ROM, so 'rst 16' does the ...
    Battle Bunny Battle Bunny September 2015 Development
  • 48k not startingHi team, I have 2 48k's, one works (Issue 4s), one doesn't (Issue 4a). The non-working one appears to start, but not finish the RAM test. The pape…

    ... run code from an external ROM (e.g. the Retroleum SMART ... is on a lower RAM fault.

    B
    balford balford September 2015 Hardware
  • 48k not startingHi team, I have 2 48k's, one works (Issue 4s), one doesn't (Issue 4a). The non-working one appears to start, but not finish the RAM test. The pape…

    ... /"]fault finding guide[/url].
    [*]Alternative: build your own DIY external ROM ...
    1024MAK 1024MAK September 2015 Hardware
<1…13141516171819…34>

Latest Posts

  • Minor British Sports that did become games on the ZX Spectrum
    dmsmith on 11:22PM
  • I bought an accoustic guitar. How do you play it?
    Maroc's Other Projection on 9:55PM
  • Goodbye Z80
    moggy on 9:07PM
  • Happy 40th Birthday to the Amstrad CPC464!
    AndyC on 6:29PM
  • Another Birthday! The Game Boy Is 35!
    dm_boozefreek on 6:17PM
  • I am currently watching.....
    Antiriad2097 on 5:05PM
  • European Software Titles with an English version
    harriusherbartio on 12:06PM
  • How Do You Categorize Your Speccy Software and Games?
    harriusherbartio on 11:21AM
  • Fixed Speccy Software. And which games remained unfixed?
    harriusherbartio on 11:01AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21

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