PX-716A power cal and dvd read errors.
reloaded all software - no go.
removed eide cable powerup recal - no go.
tried compressed air with vacuum assist - no go.
removed case and vacuumed circuitry.
cleaned laser with alcohol 70% - no go.
removed laser cable from pcb power reset - no go.
edit- updated firmware to rev10, also using only verbatim 16x
then removed cable from laser, which was not installed
straight in the connector. examined with a magnifier and
noticed on one end that the trace had barely made contact
to the connector.
reinstalled cable flush with connector and unit working
Over a period of time the vibration from the movement
of the laser must have caused the connection to develope
a resistance. The unit would randomly work, but got worse
The connectors swing upward at a 90 degree angle to allow
the cable to be removed with zero force.