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  1. craigorm

    MLS-18D Flex Circuit Membrane

    Just in case anyone has the same problem, here's a quick solution I found. The flex membrane in these phones has 2 ribbon connectors on the circuitboard. I located the pin that traces to the line 1 button. I put a peice of tape just over the lead going to line 1 so it would not make contact in...
  2. craigorm

    MLS-18D Flex Circuit Membrane

    I should have clarified these are old used phones I bought off of Ebay. They are 7-10 years old.
  3. craigorm

    MLS-18D Flex Circuit Membrane

    I purchased 7 mls-18d phones for a small office. In about 6 weeks 4 of the phones have died. They all do the same thing. When plugged in for about 20-30 minutes they start an odd beeping sound and are completely unusable. If I press the line 1 button and hold it I can hear a dialtone but it is...

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