DM4800 All switch lights stay on after start up including overload leds

Discussion in 'TASCAM DM-3200 & DM-4800' started by ghook, Jan 31, 2020.

  1. ghook

    ghook New Member

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    Hi ,I have an early version DM4800 which is about 14 years old and on startup today all the switch led's and overload leds remain lit.Everything seems to work ok but obviously is unusable in its current state.Has anyone had this issue happen or know a fix.I tried a diagnostic test and found the (F11 clear Out) button in the Machine Control section was not working.I tried contact spray to no avail.Thanks for any help anyone can give.Geoff from Australia
  2. cmaffia

    cmaffia Moderator Staff Member

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    2 x DM3200, DA-3000
    Did you try DeOxit? Would a perpetually stuck F11 button cause all lights to stay on? Something else is up
  3. ghook

    ghook New Member

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    Thanks for your reply.I only tried contact cleaner.Like you I think something else is up.I just don't know what it is.
  4. cmaffia

    cmaffia Moderator Staff Member

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    It's a short somewhere. Not sure it's related to F11 key.
  5. ghook

    ghook New Member

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    Thanks cmaffia,I think I better ring Tascam Australia to seek a repairer who can check it out.
  6. Fiber

    Fiber New Member

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    I think your power supply has a problem on one rail, probably ripple that keeps it in a bootloop. These machines are getting quite old so I guess the caps are starting to dry out.