I have a gpx PDL705, remote is missing. Only CDs will play. Can i fix it?

SOURCE: error not disc

Have you reset the little eye under the dvd.  Gentlly slide it to the middle and turn it back on..  sometimes that works

SOURCE: GPX PDL705---Picture very dark

Sounds like the back lighting of the LCD screen is faulty. Is it a new unit - take it back. You might try the brightness and contrast controls and turn them up. If that doesn't help it needs to be repaired.
nssms

SOURCE: I can't determine the polarity of my GPX PDL705 portable dvd

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buy replacement ac adapter power charger cord for GPX PDL705

SOURCE: I have a GPX PDL705. I am getting a flashing

if it plays ok with the cord plugged in then you might have a shorted cell in the battery.. that prevents the battery voltage from ever getting to its design value .. the charger shows this like the battery never gets charged ... removing or replacing the battery should eliminate the blinking symbol...