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Toastrack - poor state/non working requiredHi all, I'm after the rattiest, tattiest, non-working toastrack that can be gotten - I'd like to obtain one I can fully socket for testing my diagn…
... fully socket for testing my diagnostics on and would not like ... -
48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…
... Wearmouth's gw03 ROM) and diagnostics and that works too. Create ... -
12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
... the ram. I ran the diagnostics cartridge, and this told me ... -
Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…
... tests using the ZX Spectrum Diagnostics ROM v0.33. I've ... too but wouldn't the diagnostics ROM highlight something with any ... -
48k Speccy died, resistors getting too hot to touchHi folks, With 2 days to go till an exhibition my trusty dual-boot 48K issue 3b that I made last year has given up the ghost and I'm not sure I ha…
... a really dark screen, the diagnostics portion of the ROM failed ... -
Spectrum 48k won't start any software but passes all RAM testsI have a rubber key 48k which will not start any software - it appears to work perfectly right up until the end of the tape and the program would sta…
... https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests no problems ... -
Spectrum 48+ 4S - Upper RAM issue, and now a self-created problem!I recently picked up a known-flaky spectrum off eBay, to have a bit of fun fixing it and reliving youth. It was labelled as 'keyboard duff, shows…
... of Balford's ram test diagnostics said the whole of upper ... -
Upper memory not available in issue 2A friend send me his issue 2 Spectrum for diagnosis. It boots okay but for some reason won't load games over 16kB. He sent also a Smart Card with int…
... a Smart Card with integrated diagnostics ROM, which failed the upper ... -
Issue with loading on a +2 (Grey)Hello together, I have a problem with my newly aquired (and first ZX Spectrum + 2 Grey). It isn't possible to load any game at all, because the…
... https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests . Strangely enough ... -
Strange Fault on 128 +2 GreyHi I've got 2 128 +2 Grey Spectrums and I thought they were both in good working order but it seems not but I have no idea what is wrong with one …
... https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests, and then ... https://github.com/brendanalford/zx-diagnostics/wiki/Firmware . All test pass ... -
Lower & upper ram IC's for an issue 3 please.Would any of you great folks have 1 spare lower ram, and 1 spare upper ram IC's you would be willing to sell. I'm fixing up a poorly Spectrum that is…
... an issue 3 board. Running diagnostics has highlighted that both IC6 ... -
ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... it's fine, connected the diagnostics board, and this makes no ... -
ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…
... Brendan Alford's "ZX Spectrum Diagnostics"
Exchange all electrolytic capacitors ... -
+2 crashes upon pressing some keysYears ago I purchased off ebay a mint condition, Dixons special offer boxed UK-made issue 1 +2. I did not use it so much until recently however, focu…
... ="https://github.com/brendanalford/zx-diagnostics/wiki/Tape-Tests"]this[/url ... -
Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…
... shorts, no problems. Tried the diagnostics again and this time everything ... the colored blocks. Ran the diagnostics again, this time beeper started ... problems were still present. The diagnostics reported IC13 still as faulty ... -
Microdigital TK95 / TK90X - my experiencesAs asked for by Renegade [url="https://worldofspectrum.org/forums/discussion/58189"]here[/url] I'll do a short writeup of my experiences with my TK90…
... /simple demos and ran the diagnostics ROM by Brendan Alford. Crapbert ... -
boot fail .. bad address lines A7,A12,A13anybody have any ideas what could be wrong with this specie issue 3B .. work done : removed rom, upper ram & logic put lower ram multiplexers in sock…
... different external rom ie zx diagnostics, or ,paul fellow program etc ... -
debuggingI have read a fair bit about z80 machine code and am ready to experiment using Tasm. One concern is how would you debug using this method of programm…
... not so easy to drop diagnostics into your program (like PRINT ... -
debuggingI have read a fair bit about z80 machine code and am ready to experiment using Tasm. One concern is how would you debug using this method of programm…
... not so easy to drop diagnostics into your program (like PRINT ... -
Overhauling my games room this weekend.Started just now, I bought a second hand bookcase for ?10. The guy in the second hand bookshop was a bit suprised when I told him that it was for vid…
... to free play, all the diagnostics are fine, except there is ... -
+3 sound questionsI know that the original +3 had the distorted sound problem. I also know that the +3b does not. Can anyone tell me what issue of the motherboard ca…
All +3B's have v4.1 ROM's AFAIK.
You can find out what ROM you have by holding down space when resetting the machine to get the test image then holding down QAZ PLM to get the diagnostics. -
SPECTRUM +3 NIGHTMAREGot my Specci +3 through the post this morning. The good news all the keys work and it turns on ok. The bad news the disk drive doesn't work. When yo…
... would also run through the diagnostics flow chart in the +3 ... . Give the built in ROM diagnostics a try too. You never ... -
"Unknown disk format"-error on Spectrum +3Hi, I have just gotten around to changing the drivebelt in my newly acquired +3. I tried to format one of the 3" disks I bought on eBay the other we…
did you run the +3's disgnostic test?
Turn it on, hold down BREAK then there's a combination of 4 keys to press (someone on here will tell you) then you're taken onto the diagnostics screen -
JamJust wondering what progs everyone always keeps on their computay`s and why? I`ll start the ball rolling :- BSPlayer Pro... My fave Video player, or…
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[B]SiS Sandra[/B] - diagnostics program
[B]System Mechanic ... -
PAW tests - help and discussion :)Hello my friends :) I have started to make some tests with PAW and I must say I'm very pleased and surprised at the great program. I will be posting…
... 2 (test your adventure with diagnostics on, hit enter to bring ... -
PAW tests - help and discussion :)Hello my friends :) I have started to make some tests with PAW and I must say I'm very pleased and surprised at the great program. I will be posting…
... 2 (test your adventure with diagnostics on, hit enter to bring ... -
Anybody fancy coding this?blah de blah de blah Please ignore, poting error.
... topic, while making my Spectrum Diagnostics board, I've run into ... -
BooHoo....Broken Speccy on 25th anniversary!Speccy broke today (today of all days!!) I'm presented with black screen on power up, anybody any ideas what might have gone wrong and any repair ti…
... 4116 is actually bad. (My diagnostics board is designed to sniff ... -
BooHoo....Broken Speccy on 25th anniversary!Speccy broke today (today of all days!!) I'm presented with black screen on power up, anybody any ideas what might have gone wrong and any repair ti…
... more guinea-pigs for my diagnostics board - send it to me ... -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... I'd plug in my Diagnostics Board and see what it ...
