Keep things simple

Hi Charles, as i don't know your level of experience working on vehicle's i apologise in advance if this sounds a bit patronising but i always begin with the premise that the postee know's little more than the basic's, so here goes.Have the trans fluid checked for level and condition , as this would help explain while ok when cold, also get the OBD codes read to see if there is a component or circuit involved , please keep me posted as to your progress

Dont mean to sound patronising , but not using the default options on the tvremote.
Have you gone deep into the inbuilt on screen menu and selected sound and colour to make sure it had not been disabled or turned down, as those onscreen menu tv settings can over ride remote tv control options

dont do it if your not fairly average mechanic .

usually left spare for addition electronics.

Hi there, takes a bit of working out without a manual, but try this....take bottom half of trimmer line spool off, get piece of spool line approx 60 cm, long and thread through centre holes, ( bit fiddly but ) pull line through until you have equal length on both sides, dont try and wind it up onto the spool, just put ends of line through outside cover holes, then lock spool in place in other half. now simply wind the knob at the end and the line should retract into the spool., sounds complicated but really isnt, best regards and good luck, Philbee