Apple IIe: Vertical Bars or Hissing after Logic PCB Replacement



PROBLEM DESCRIPTION: After the logic PCB is replaced, the
Apple IIe displays vertical bars on the monitor or makes a
hissing sound.

CAUSE: The speaker wire may be shorting against the logic PCB.

CURE: 1. Check to see if the speaker wire is running under the
Logic Board. If this is the case the wire may have
been punctured by one of the IC pins protruding from
the bottom of the logic board.

2. Route the wire over the top of the board and reconnect
the speaker. If this cures the problem, replace the
speaker with a new one.

3. Follow the Level I Tech Procedures to replace the Logic Board.

If this cure does not resolve the problem, go back to the Word Search
screen and search on the product's name and HTS and GTS to obtain a
General Troubleshooting procedure.



Published Date: Feb 19, 2012