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Faulty +2, What could it be?

SteveINtheUKokSteveINtheUKok
edited May 2014 in Hardware
Hi,

ZX Spectrum +2, grey model with a barrel connector for power.

When powered up the screen has lots of flashing coloured blocks each with some rubbish in them. Looks a mess.

Any idea what might be the fault, know its difficult from that description, but it may ring a bell with some of you.

Glad of any help

Thanks
Post edited by SteveINtheUKok on

Comments

  • napoleonblownapartenapoleonblownaparte
    edited June 2012
    Sounds like the problem I'm having with my CPU socket - do you have alternate black & white bars behind the flashing attributes?
  • MaccMacc
    edited May 2014
    Ive just aquired a faulty +2B, horizontal black and white bars with occasional flashing screen corruption but the bars always remain. Z80 and ROMs switched out to no avail

    (Sorry for the thread necromancy!)
  • guesserguesser
    edited May 2014
    Macc wrote: »
    Ive just aquired a faulty +2B, horizontal black and white bars with occasional flashing screen corruption but the bars always remain. Z80 and ROMs switched out to no avail

    RAM next then?

    Or buzz out all the traces to look for cracks or shorts first.
    My rubbish website including the redrawn Amstrad schematics and the Sinclair Wiki.
  • balfordbalford
    edited May 2014
    At least there's only 4 memory IC's to check on that model :)
    The Spectrum Resuscitation Thread - bringing dead Spectrums back to life
    zx-diagnostics - Fixing ZX Spectrums in the 21st Century (wiki)
    Sinclair FAQ Wiki
  • MaccMacc
    edited May 2014
    Ay there is, wish I could tell which though!
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