Computer beeps three times at startup

  1. Three beeps means that no RAM banks passed memory testing.
  2. If a RAM card is installed in the upper expansion slot (if not, skip to next step), remove it and restart.
  • If symptom does not repeat, replace RAM card.
  • If symptom repeats, replace RAM in lower RAM slot with known-good and compatible RAM card and restart. If symptom repeats, replace logic board.

3. If a RAM card is not installed in the upper expansion slot, replace RAM in lower RAM slot with known-good and compatible RAM card and restart.

• If symptom repeats, replace logic board.

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