Recording DVD unresponsive

[N_Cook]

Panasonic DMR EZ25 , no known history.
ps voltages agree with manual
slow to respond to buttons like open/close and will not play discs , will go
through the sledge/platter sequence before ejecting, laser light present.
Most of the time just says please wait.
Will not respond to the almost inhuman hand-span 3 button push at power-up
to go into service mode.
Will respond to forced power off of 10 second push of power/standby button
and go to presumably flashing clock of 0:00 that does not advance to 0:01
I've reseated all ribbons and before ESR'ing caps , and exploring rear of
main board, any ideas of anything specific to look at

 

[N_Cook]

Well that was an interesting exercise in fingertip manipulation . Fathomed
(accidently ;-)) how to release the central area of the deck then remove
the 2 sled slide rods and then remove the laser assembly. Now know it is
type RAF3332A. Then get inside the optics, all without disturbing any
set-screws for slide or optics I think, and reassemble. The 45 degree mirror
was filthy with dust and even a curl of hair right at the centre, if it was
the outlet lens that was that dirty then a CD/DVD player would work. Not yet
fully reassembled and powered up yet