Apple Macintosh LC 575 Specifications download pdf (Page 46)

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 25

Miscellaneous

(Continued)

Screen shows “Sad

Macintosh” icon and

black vertical lines;

screeching sound

1 Replace RAM SIMMs on logic board.

2 Replace logic board. Retain customer’s SIMMs.

Headphone jack does

not operate correctly

1 Verify that headphone jack is seated properly.

2 Replace front panel control board.

3 Replace chassis harness assembly.

No sound from

external speakers

1 Check that volume is turned on (manually or through Control

Panel).

2 Verify that headphones are unplugged.

3 Verify that speaker connectors are properly connected.

4 Test speakers with known-good Macintosh; if speakers do not

work, replace them.

5 Replace logic board.

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 150 151

No comments

Apple Macintosh LC 575 Specifications Page 46